1.
CD Video
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CD Video is a format of optical media disc that was introduced in 1987 that combines the technologies of standard compact disc and LaserDisc. CD-V discs are the size as a standard 12-cm audio CD. It also contains up to 5 minutes of video information plus digital CD-quality sound. One of the first LaserDisc players that can play CD-V discs is the Pioneer CLD-1010 from 1987, though it is a CD-based format, CD Video was never given a rainbow book designation. CD Video discs have a gold color, to differentiate them from regular silver-colored audio CDs. This is a characteristic that would later be replicated in HVD, a similar version of CD Video called Video Single Disc was also released. It is basically the same as CD Video, but it only has the video track. CD Video was targeted toward teenagers who watched music videos on MTV, however, few of them were familiar with LaserDiscs, and far fewer owned CDV-compatible players at the time. Buying a costly new player was not an option just for the use of playing a single music video that can be recorded with a VCR. IEC61104 - Compact disc video system -12 cm CD-V A webpage on CD Video discs, featuring a list of NTSC CD-V releases The LaserDisc Database, including CD Video
2.
Videodisc
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Videodisc is a general term for a laser- or stylus-readable random-access disc that contains both audio and analog video signals recorded in an analog form. Typically, it is a reference to any media that predates the mainstream popularity of the DVD format. When played back at 16 frames per second, it would give a time of 13 seconds. Theodore Brown patented in 1907 a photographic system of recording approximately 1,200 images in a spiral of pictures on a 10 inch disk. Played back at 16 frames per second, the disk could provide around one and this was intended to be synchronously combined with playback from a vinyl record. It appears a working system was never produced and it has similarities with the tape based Electronic Video Recording system, which was released for professional use. Westinghouse Electric Corporation developed a system in 1965 called Phonovid, that allowed for the playback of 400 stored still images, the system used a standard record player, and built the picture up slowly. The Television Electronic Disc, a system was rolled out in Germany. 12-inch discs had a capacity of eight minutes, however. Visc was a video disc system developed in Japan by Matsushita subsidiary National Panasonic. The 12-inch vinyl disc was spun at 500 rpm with each holding three frames of color video, with a total of up to an hour of video on each side of the disc. Discs could be recorded in either a 30-minute-per-side format, or a 60-minute-per-side-format, a later incarnation of the system used 9-inch discs in caddies capable of storing 75 minutes per side The system was abandoned in January 1980 in favor of JVCs VHD system. The DiscoVision system was released in America in 1978, developed by MCA and Philips of the Netherlands, it utilized an optical reflective system read by a laser beam. It was renamed several times, as VLP, Laservision, finally, Japans Pioneer Electronic Corporation trademarked it as LaserDisc, the name by which it is perhaps best known. The format struggled to gain acceptance in the consumer market, and Pioneer became the chief sponsor of the format when MCA. The high cost of players and discs was the main reason for its ultimate demise. Thomson CSF created a system that used thin flexible video discs, the system was marketed for industrial and educational use in 1980. Each side of the disc could hold 50,000 still CAV frames, Thomson exited the videodisc market in 1981
3.
Optical disc
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The encoding material sits atop a thicker substrate which makes up the bulk of the disc and forms a dust defocusing layer. The encoding pattern follows a continuous, spiral path covering the disc surface. Most optical discs exhibit a characteristic iridescence as a result of the diffraction grating formed by its grooves and this side of the disc contains the actual data and is typically coated with a transparent material, usually lacquer. The reverse side of a disc usually has a printed label, sometimes made of paper. Optical discs are usually between 7.6 and 30 cm in diameter, with 12 cm being the most common size, a typical disc is about 1.2 mm thick, while the track pitch ranges from 1.6 µm to 320 nm. An optical disc is designed to support one of three recording types, read-only, recordable, or re-recordable, write-once optical discs commonly have an organic dye recording layer between the substrate and the reflective layer. Rewritable discs typically contain an alloy recording layer composed of a phase change material, most often AgInSbTe, an alloy of silver, indium, antimony, Optical discs are most commonly used for storing music, video, or data and programs for personal computers. The Optical Storage Technology Association promotes standardized optical storage formats, although optical discs are more durable than earlier audio-visual and data storage formats, they are susceptible to environmental and daily-use damage. Libraries and archives enact optical media preservation procedures to ensure continued usability in the optical disc drive or corresponding disc player. For computer data backup and physical data transfer, optical discs such as CDs and DVDs are gradually being replaced with faster, smaller solid-state devices and this trend is expected to continue as USB flash drives continue to increase in capacity and drop in price. Additionally, music purchased or shared over the Internet has significantly reduced the number of audio CDs sold annually. The first recorded use of an optical disc was in the 1884 when Alexander Graham Bell, Chichester Bell. An early optical disc system existed in 1935, named Lichttonorgel, an early analog optical disc used for video recording was invented by David Paul Gregg in 1958 and patented in the US in 1961 and 1969. This form of optical disc was an early form of the DVD. It is of special interest that U. S, patent 4,893,297, filed 1989, issued 1990, generated royalty income for Pioneer Corporations DVA until 2007 —then encompassing the CD, DVD, and Blu-ray systems. In the early 1960s, the Music Corporation of America bought Greggs patents and his company, american inventor James T. Russell has been credited with inventing the first system to record a digital signal on an optical transparent foil which is lit from behind by a high-power halogen lamp. Russells patent application was first filed in 1966 and he was granted a patent in 1970, following litigation, Sony and Philips licensed Russells patents in the 1980s. Both Greggs and Russells disc are floppy media read in transparent mode, in the Netherlands in 1969, Philips Research physicist, Pieter Kramer invented an optical videodisc in reflective mode with a protective layer read by a focused laser beam U. S
4.
Content format
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A content format is an encoded format for converting a specific type of data to displayable information. Content formats are used in recording and transmission to prepare data for observation or interpretation and this includes both analog and digitized content. Content formats may be recorded and read by either natural or manufactured tools, in addition to converting data to information, a content format may include the encryption and/or scrambling of that information. Multiple content formats may be contained within a section of a storage medium or transmitted via a single channel of a transmission medium. With multimedia, multiple tracks containing multiple content formats are presented simultaneously, content formats may either be recorded in secondary signal processing methods such as a software container format or recorded in the primary format. Observable data is known as raw data, or raw content. There has been a number of content formats throughout history
5.
Megabyte
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The megabyte is a multiple of the unit byte for digital information. Its recommended unit symbol is MB, but sometimes MByte is used, the unit prefix mega is a multiplier of 1000000 in the International System of Units. Therefore, one megabyte is one million bytes of information and this definition has been incorporated into the International System of Quantities. However, in the computer and information fields, several other definitions are used that arose for historical reasons of convenience. A common usage has been to one megabyte as 1048576bytes. However, most standards bodies have deprecated this usage in favor of a set of binary prefixes, less common is a convention that used the megabyte to mean 1000×1024 bytes. The megabyte is commonly used to measure either 10002 bytes or 10242 bytes, the interpretation of using base 1024 originated as a compromise technical jargon for the byte multiples that needed to be expressed by the powers of 2 but lacked a convenient name. As 1024 approximates 1000, roughly corresponding to the SI prefix kilo-, in 1998 the International Electrotechnical Commission proposed standards for binary prefixes requiring the use of megabyte to strictly denote 10002 bytes and mebibyte to denote 10242 bytes. By the end of 2009, the IEC Standard had been adopted by the IEEE, EU, ISO, the Mac OS X10.6 file manager is a notable example of this usage in software. Since Snow Leopard, file sizes are reported in decimal units, base 21 MB =1048576 bytes is the definition used by Microsoft Windows in reference to computer memory, such as RAM. This definition is synonymous with the binary prefix mebibyte. Mixed 1 MB =1024000 bytes is the used to describe the formatted capacity of the 1.44 MB3. 5inch HD floppy disk. Semiconductor memory doubles in size for each address lane added to an integrated circuit package, the capacity of a disk drive is the product of the sector size, number of sectors per track, number of tracks per side, and the number of disk platters in the drive. Changes in any of these factors would not usually double the size, sector sizes were set as powers of two for convenience in processing. It was an extension to give the capacity of a disk drive in multiples of the sector size, giving a mix of decimal. Depending on compression methods and file format, a megabyte of data can roughly be, a 4 megapixel JPEG image with normal compression. Approximately 1 minute of 128 kbit/s MP3 compressed music,6 seconds of uncompressed CD audio. A typical English book volume in plain text format, the human genome consists of DNA representing 800 MB of data
6.
International standard
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International standards are standards developed by international standards organizations. International standards are available for consideration and use worldwide, the most prominent organization is the International Organization for Standardization. International standards may be used either by application or by a process of modifying an international standard to suit local conditions. Technical barriers arise when different groups together, each with a large user base. Establishing international standards is one way of preventing or overcoming this problem, the implementation of standards in industry and commerce became highly important with the onset of the Industrial Revolution and the need for high-precision machine tools and interchangeable parts. Henry Maudslay developed the first industrially practical screw-cutting lathe in 1800, maudslays work, as well as the contributions of other engineers, accomplished a modest amount of industry standardization, some companies in-house standards spread a bit within their industries. Joseph Whitworths screw thread measurements were adopted as the first national standard by companies around the country in 1841 and it came to be known as the British Standard Whitworth, and was widely adopted in other countries. By the end of the 19th century differences in standards between companies were making trade increasingly difficult and strained, the Engineering Standards Committee was established in London in 1901 as the worlds first national standards body. After the First World War, similar national bodies were established in other countries, by the mid to late 19th century, efforts were being made to standardize electrical measurement. An important figure was R. E. B, Crompton, who became concerned by the large range of different standards and systems used by electrical engineering companies and scientists in the early 20th century. Many companies had entered the market in the 1890s and all chose their own settings for voltage, frequency, current, adjacent buildings would have totally incompatible electrical systems simply because they had been fitted out by different companies. Crompton could see the lack of efficiency in this system and began to consider proposals for a standard for electric engineering. In 1904, Crompton represented Britain at the Louisiana Purchase Exposition in Saint Louis as part of a delegation by the Institute of Electrical Engineers. He presented a paper on standardisation, which was so well received that he was asked to look into the formation of a commission to oversee the process. By 1906 his work was complete and he drew up a permanent constitution for the first international standards organization, the body held its first meeting that year in London, with representatives from 14 countries. In honour of his contribution to electrical standardisation, Lord Kelvin was elected as the bodys first President, the International Federation of the National Standardizing Associations was founded in 1926 with a broader remit to enhance international cooperation for all technical standards and specifications. The body was suspended in 1942 during World War II, after the war, ISA was approached by the recently formed United Nations Standards Coordinating Committee with a proposal to form a new global standards body. List of international common standards List of technical standard organisations Global Frameworks and standards organized along function lines, accessed 2014 ^ Cordova
7.
White Book (CD standard)
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The White Book refers to a standard of compact disc that stores not only sound but also still pictures and motion video. It was released in 1993 by Sony, Philips, Matsushita and these discs, most commonly found in Asia, are usually called Video CDs. In some ways, VCD can be thought of as the successor to the Laserdisc, note that Video CD should not be confused with CD Video which was an earlier and entirely different format. Several extensions to the White Book were published in years, VCD2.0 in 1995, VCD-Internet in 1997. The standard is not freely available and must be licensed from Philips, the White Book also defines the more general CD-i Bridge format, which are CD-ROM XA discs with an additional Green Book CD-i specific application program. The CD-ROM XA information in bridge discs can be obtained through CD-ROM drives, Bridge discs must conform to both the CD-ROM XA and Green Book CD-i specifications. VCDs and SVCDs fall under the category of bridge discs, as do Photo CDs, the following is a summary of the specifications for VCDs and SVCDs
8.
Philips
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Koninklijke Philips N. V. is a Dutch technology company headquartered in Amsterdam with primary divisions focused in the areas of electronics, healthcare and lighting. It was founded in Eindhoven in 1891, by Gerard Philips and it is one of the largest electronics companies in the world and employs around 105,000 people across more than 60 countries. Philips is organized into three divisions, Philips Consumer Lifestyle, Philips Healthcare and Philips Lighting. As of 2012, Philips was the largest manufacturer of lighting in the world measured by applicable revenues, Philips said it would seek damages for breach of contract in the US$200-million sale. In April 2016, the International Court of Arbitration ruled in favour of Philips, Philips has a primary listing on the Euronext Amsterdam stock exchange and is a component of the Euro Stoxx 50 stock market index. It has a listing on the New York Stock Exchange. The Philips Company was founded in 1891, by Gerard Philips and this first factory has been adapted and is used as a museum. In 1895, after a difficult first few years and near bankruptcy, though he had earned a degree in engineering, Anton started work as a sales representative, soon, however, he began to contribute many important business ideas. After Gerard and Anton Philips changed their business by founding the Philips corporation. In the 1920s, the company started to other products. In 1939, they introduced their electric razor, the Philishave, the Chapel is a radio with built-in loudspeaker, which was designed during the early 1930s. On 11 March 1927, Philips went on the air with shortwave radio station PCJJ which was joined in 1929 by sister station PHOHI, PHOHI broadcast in Dutch to the Dutch East Indies while PCJJ broadcast in English, Spanish and German to the rest of the world. The international program on Sundays commenced in 1928, with host Eddie Startz hosting the Happy Station show, broadcasts from the Netherlands were interrupted by the German invasion in May 1940. The Germans commandeered the transmitters in Huizen to use for pro-Nazi broadcasts, some originating from Germany, Philips Radio was absorbed shortly after liberation when its two shortwave stations were nationalised in 1947 and renamed Radio Netherlands Worldwide, the Dutch International Service. Some PCJ programs, such as Happy Station, continued on the new station, by the late 1940s, the Type 10 was ready to be handed over to Philips subsidiary Johan de Witt in Dordrecht to be produced and incorporated into a generator set as originally planned. The result, rated at 180/200 W electrical output from a bore, approximately 150 of these sets were eventually produced. However, they filed a number of patents and amassed a wealth of information. The first Philips shaver was introduced in the 1930s, and was simply called “The Philishave”, in the USA, it was called the “Norelco”, which remains a part of their product line today
9.
Sony
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Sony Corporation is a Japanese multinational conglomerate corporation that is headquartered in Kōnan, Minato, Tokyo. Its diversified business includes consumer and professional electronics, gaming, entertainment, the company is one of the leading manufacturers of electronic products for the consumer and professional markets. Sony was ranked 116th on the 2015 list of Fortune Global 500 and these make Sony one of the most comprehensive entertainment companies in the world. The group consists of Sony Corporation, Sony Pictures Entertainment, Sony Interactive Entertainment, Sony Music Entertainment, Sony Financial Holdings and others. Sony is among the Semiconductor sales leaders by year and as of 2013, the companys current slogan is BE MOVED. Their former slogans were make. believe, like. no. other, Sony has a weak tie to the SMFG keiretsu, the successor to the Mitsui keiretsu. Sony began in the wake of World War II, in 1946, Masaru Ibuka started an electronics shop in a department store building in Tokyo. The company had $530 in capital and a total of eight employees, in the following year he was joined by his colleague, Akio Morita, and they founded a company called Tokyo Tsushin Kogyo 東京通信工業. The company built Japans first tape recorder, called the Type-G, in 1958 the company changed its name to Sony. When Tokyo Tsushin Kogyo was looking for a name to use to market themselves, they strongly considered using their initials. The primary reason they did not is that the railway company Tokyo Kyuko was known as TTK, the company occasionally used the acronym Totsuko in Japan, but during his visit to the United States, Morita discovered that Americans had trouble pronouncing that name. Another early name that was tried out for a while was Tokyo Teletech until Akio Morita discovered that there was an American company already using Teletech as a brand name, the name Sony was chosen for the brand as a mix of two words. One was the Latin word sonus, which is the root of sonic and sound, and the other was sonny, a common slang term used in 1950s America to call a boy. In the 1950s Japan sonny boys, was a word into Japanese which connoted smart and presentable young men. The first Sony-branded product, the TR-55 transistor radio, appeared in 1955, at the time of the change, it was extremely unusual for a Japanese company to use Roman letters to spell its name instead of writing it in kanji. The move was not without opposition, TTKs principal bank at the time and they pushed for a name such as Sony Electronic Industries, or Sony Teletech. Akio Morita was firm, however, as he did not want the company tied to any particular industry. Eventually, both Ibuka and Mitsui Banks chairman gave their approval, according to Schiffer, Sonys TR-63 radio cracked open the U. S. market and launched the new industry of consumer microelectronics
10.
Panasonic
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Panasonic Corporation, formerly known as Matsushita Electric Industrial Co. Ltd. is a Japanese multinational electronics corporation headquartered in Kadoma, Osaka, Japan. The company was founded in 1918 and has grown to one of the largest Japanese electronics producers alongside Sony, Hitachi, Toshiba. In addition to electronics, it offers non-electronic products and services such as home renovation services, Panasonic is the worlds fourth-largest television manufacturer by 2012 market share. Panasonic has a listing on the Tokyo Stock Exchange and is a constituent of the Nikkei 225. It has a listing on the Nagoya Stock Exchange. From 1935 to October 1,2008, the name was Matsushita Electric Industrial Co. Ltd. On January 10,2008, the announced that it would change its name to Panasonic Corporation, in effect on October 1,2008. The name change was approved at a meeting on June 26,2008 after consultation with the Matsushita family. Panasonic was founded in 1918 by Kōnosuke Matsushita as a vendor of duplex lamp sockets, in 1927, it began producing bicycle lamps, the first product which it marketed under the brand name National. After the war, Panasonic regrouped as a Keiretsu and began to supply the boom in Japan with radios and appliances. Matsushitas brother-in-law, Toshio Iue, founded Sanyo as a subcontractor for components after World War II, Sanyo grew to become a competitor to Panasonic, but was later acquired by Panasonic in December 2009. In 1961, Konosuke Matsushita traveled to the United States and met with American dealers, the company began producing television sets for the U. S. market under the Panasonic brand name, and expanded the use of the brand to Europe in 1979. The company used the National brand outside of North America from the 1950s to the 1970s, the company also developed a line of home appliances such as rice cookers for the Japanese and Asian markets. Rapid growth resulted in the company opening manufacturing plants around the world, the company debuted a hi-fidelity audio speaker in Japan in 1965 with the brand Technics. This line of high quality stereo components became worldwide favorites, the most famous products being its turntables, such as the SL-1200 record player, known for its high performance, precision and durability. In 1973, Matsushita formed a joint venture with Anam Group, in 1983, Matsushita launched the Panasonic Senior Partner, the first fully IBM PC compatible Japanese-made computer. In November 1990, Matsushita agreed to acquire the American media company MCA Inc. for US$6.59 billion, Matsushita subsequently sold 80% of MCA to Seagram Company for US$7 billion in April 1995. In 1998, Matsushita sold Anam National to Anam Electronics, on May 2,2002, Panasonic Canada marked its 35th anniversary in that country by giving $5-million to help build a music city on Torontos waterfront
11.
JVC
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Victor Company of Japan, Ltd, TYO,6792, usually referred to as JVC, is a Japanese international professional and consumer electronics corporation based in Yokohama. Founded in 1927, the company is best known for introducing Japans first televisions, from 1953 to 2008, Matsushita Electric Industrial Co. Ltd. was the majority stockholder in JVC. In 2008, JVC merged with Kenwood Corporation to create JVC Kenwood Holdings, JVC was founded in 1927 as The Victor Talking Machine Company of Japan, Limited, a subsidiary of the United States leading phonograph and record company, the Victor Talking Machine Company. In 1929 majority ownership was transferred to RCA-Victor, in the 1930s JVC produced phonographs and records. In 1932, JVC started producing radios, and in 1939 Japans first locally-made television, JVC severed relations with its foreign partners during World War II. Today the record company in Japan is known as Victor Entertainment, in 1953, JVC became majority-owned by the Panasonic Corporation. Panasonic released its ownership in 2007, in the 1960s, JVC established the Nivico brand for Delmonicos line of console televisions and stereos. In 1970, JVC marketed the Videosphere, a cathode ray tube television inside a space-helmet-shaped casing with an alarm clock at the base. In 1971, JVC introduced the first discrete system for four channel quadraphonic sound on vinyl records - CD-4 or Quadradisc, in 1975, JVC introduced the first combined portable battery-operated radio with inbuilt TV, as the model 3050. The TV was a 3-inch black-and-white cathode ray tube, one year later, JVC expanded the model to add a cassette-recorder, as the 3060, creating the worlds first boombox with radio, cassette and TV. In 1976, the first VCR to use VHS was the Victor HR-3300, JVC started selling the HR-3300 in Akihabara, Tokyo, Japan on October 31,1976. Region-specific versions of the JVC HR-3300 were also distributed later on, such as the HR-3300U in the United States, in the late 1970s, JVC developed the VHS format, introducing the first VHS recorders to the consumer market in 1976 for the equivalent of US $1060. Sony, which had introduced the Betamax home videocassette tape a year earlier, became the competitor for JVCs VHS format into the 1980s. The Betamax cassette was smaller, with slightly superior quality to the VHS cassette. The two companies competed fiercely to encourage others to adopt their format, but by 1984 forty companies were using JVCs VHS format, Sony began producing VHS recorders in 1988 and after 1993 stopped making Betamax recorders for the US market. In 1979, JVC demonstrated a prototype of its high density disc system. This system was capacitance-based, like capacitance electronic disc, but the discs were grooveless with the stylus being guided by signals in the disc surface. The VHD discs were initially handled by the operator and played on a machine that looked like an audio LP turntable, development suffered numerous delays, and the product was launched in 1983 in Japan, followed by the United Kingdom in 1984, to a limited industrial market
12.
Super Video CD
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Super Video CD is a digital format for storing video on standard compact discs. SVCD was intended as a successor to Video CD and an alternative to DVD-Video, although SVCDs proved more sophisticated than VCDs, the format remains in the latters shadow. Similar to VCDs, SVCDs comply with the CD-i Bridge format, the first track is in CD-ROM XA Mode 2, Form 1, and contains metadata about the disc. The other tracks are in Mode 2, Form 2, and contain audio and this allows roughly 800 megabytes of data to be stored on one 80 minute CD. One CD can hold up to 35 minutes of full quality SVCD-format video, on the downside, this increase in picture resolution sacrifices video length capacity by over 50%. Because of this, titles released on SVCD has to come in twice the number of discs of their VCD equivalents. Unlike other CD-based formats, such as China Video Disc and Video CD, however, many DVD and Blu-ray players will play back SVCD resolution video from a DVD or Blu-ray disc anyway. Interlaced video is supported for SVCD video, though not required,23.976 frames per second video is supported by use of interlacing and 3,2 pulldown. The combined audio and video bit rates should not exceed 2.7 Mbps and this data rate was chosen, in part, to ensure compatibility with slower and less expensive 2 × speed CD drives. Codec, MPEG-1 Audio Layer II Frequency,44,100 hertz Output, Monaural, dual channel, stereo, SVCDs may have two separate stereo, or four mono audio tracks. Audio may have up to 6 channels using the MPEG Multichannel surround sound format, although space constraints and inconsistent hardware support make it impractical, variable bit rate encoding, while not supported by the MPEG-1 Audio Layer II standard, is part of the SVCD specification. However, variable bit rate audio is not consistently supported by standalone players, play back of SVCD titles is impaired when played on most DVD players, causing dropped frames, choppy video playback or skipping of sound. This is due to the unfortunately chosen two-thirds video ratio in the SVCD format specifications, most DVD players support the video formats VCD, SVCD and DVD but the best resolution usually dictates the design of all the electronics components, most notably the low pass filter. With only one analog low pass filter optimised for one video format, the SVCD format is especially prone to foldover because the 480p format doesnt fit well over a 720p output. Although the aliasing artifacts that result from this bad fit are usually buried in noise from other sources, such as camera, quantization, China Video Disc is a CD-based video format which was created during the development of the SVCD standard and is almost identical to SVCD. The primary technical difference is a video resolution of 352×480 or 352×576. Because 352×480/576 is a recognized DVD resolution, CVD video is fully compatible with the DVD-Video standard, the lower resolution also allows the bitrate to be reduced while keeping compression artifacts to a minimum. CVD also supports all of the features which are supported by SVCD
13.
Optical disc drive
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Some drives can only read from certain discs, but recent drives can both read and record, also called burners or writers. Compact discs, DVDs, and Blu-ray discs are common types of media which can be read. Optical disc drives that are no longer in production include CD-ROM drive, CD writer drive, combo drive, as of 2015, DVD writer drive supporting all existing recordable and rewritable DVD formats is the most common for desktop PCs and laptops. There are also the DVD-ROM drive, BD-ROM drive, Blu-ray Disc combo drive and they are also very commonly used in computers to read software and consumer media distributed on disc, and to record discs for archival and data exchange purposes. Floppy disk drives, with capacity of 1, USB flash drives, high-capacity, small, and inexpensive, are suitable where read/write capability is required. Large backups are often made on external hard drives, as their price has dropped to a level making this viable. The first laser disc, demonstrated in 1972, was the Laservision 12-inch video disc, the video signal was stored as an analog format like a video cassette. The first digitally recorded optical disc was a 5-inch audio compact disc in a format created by Sony. The CD-ROM format was developed by Sony and Denon, introduced in 1984, as an extension of Compact Disc Digital Audio, the CD-ROM has a storage capacity of 650 MB. Also in 1984, Sony introduced a LaserDisc data storage format, in 1987, Sony demonstrated the erasable and rewritable 5. 25-inch optical drive. The first Blu-Ray prototype was unveiled by Sony in October 2000, technically Blu-ray Disc also required a thinner layer for the narrower beam and shorter wavelength blue laser. The first BD-ROM players were shipped in mid-June 2006, the first Blu-ray Disc titles were released by Sony and MGM on June 20,2006. The first mass-market Blu-ray Disc rewritable drive for the PC was the BWU-100A, initially, CD-type lasers with a wavelength of 780 nm were used. For DVDs, the wavelength was reduced to 650 nm, two main servomechanisms are used, the first to maintain the proper distance between lens and disc, to ensure the laser beam is focused as a small laser spot on the disc. The second servo moves the head along the discs radius, keeping the beam on the track. Optical disk media are read beginning at the radius to the outer edge. This is detected by photodiodes that create corresponding electrical signals, an optical disk recorder encodes data onto a recordable CD-R, DVD-R, DVD+R, or BD-R disc by selectively heating parts of an organic dye layer with a laser. This changes the reflectivity of the dye, thereby creating marks that can be read like the pits, for recordable discs, the process is permanent and the media can be written to only once
14.
Compact disc
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Compact disc is a digital optical disc data storage format released in 1982 and co-developed by Philips and Sony. The format was developed to store and play only sound recordings but was later adapted for storage of data. The first commercially available Audio CD player, the Sony CDP-101, was released October 1982 in Japan, standard CDs have a diameter of 120 millimetres and can hold up to about 80 minutes of uncompressed audio or about 700 MiB of data. The Mini CD has various diameters ranging from 60 to 80 millimetres, they are used for CD singles, storing up to 24 minutes of audio. At the time of the introduction in 1982, a CD could store much more data than a personal computer hard drive. By 2010, hard drives commonly offered as much space as a thousand CDs. In 2004, worldwide sales of audio CDs, CD-ROMs and CD-Rs reached about 30 billion discs, by 2007,200 billion CDs had been sold worldwide. In 2014, revenues from digital music services matched those from physical format sales for the first time. American inventor James T. Russell has been credited with inventing the first system to record information on an optical transparent foil that is lit from behind by a high-power halogen lamp. Russells patent application was first filed in 1966, and he was granted a patent in 1970, following litigation, Sony and Philips licensed Russells patents in the 1980s. The compact disc is an evolution of LaserDisc technology, where a laser beam is used that enables the high information density required for high-quality digital audio signals. Prototypes were developed by Philips and Sony independently in the late 1970s, although originally dismissed by Philips Research management as a trivial pursuit, the CD became the primary focus for Philips as the LaserDisc format struggled. In 1979, Sony and Philips set up a joint task force of engineers to design a new audio disc. After a year of experimentation and discussion, the Red Book CD-DA standard was published in 1980, after their commercial release in 1982, compact discs and their players were extremely popular. Despite costing up to $1,000, over 400,000 CD players were sold in the United States between 1983 and 1984, by 1988 CD sales in the United States surpassed those of vinyl LPs, and by 1992 CD sales surpassed those of prerecorded music cassette tapes. The success of the disc has been credited to the cooperation between Philips and Sony, who came together to agree upon and develop compatible hardware. The unified design of the disc allowed consumers to purchase any disc or player from any company. In 1974, L. However, due to the performance of the analog format
15.
Compact Disc Digital Audio
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Compact Disc Digital Audio is the standard format for audio compact discs. The standard is defined in the Red Book, one of a series of Rainbow Books that contain the specifications for all Compact Disc formats. These parameters are common to all discs and used by all logical formats. The standard also specifies the form of audio encoding, 2-channel signed 16-bit Linear PCM sampled at 44,100 Hz. Although rarely used, the specification allows for discs to be mastered with a form of emphasis, the second edition of IEC60908 was published in 1999 and it cancels and replaces the first edition, amendment 1 and the corrigendum to amendment 1. The IEC60908 however does not contain all the information for extensions that is available in the Red Book, such as the details for CD-Text, CD+G, the standard is not freely available and must be licensed. It is available from Philips and the IEC, as of 2013, Philips outsources licensing of the standard to Adminius, which charges US$100 for the Red Book, plus US$50 each for the Subcode Channels R-W and CD Text Mode annexes. The audio contained in a CD-DA consists of two-channel signed 16-bit Linear PCM sampled at 44,100 Hz, the sampling rate is adapted from that attained when recording digital audio on a PAL videotape with a PCM adaptor, an earlier way of storing digital audio. An audio CD can represent frequencies up to 22.05 kHz, the selection of the sample rate was based primarily on the need to reproduce the audible frequency range of 20–20,000 Hz. The Nyquist–Shannon sampling theorem states that a rate of more than twice the maximum frequency of the signal to be recorded is needed. The exact sampling rate of 44, the device that converts an analog audio signal into PCM audio, which in turn is changed into an analog video signal is called a PCM adaptor. This technology could store six samples in a horizontal line. 60 field/s black and white video was required, and in NTSC countries that video signal has 245 usable lines per field, similarly, PAL has 294 lines and 50 fields, which gives 44,100 samples/s/stereo channel. This system could store 14-bit samples with some correction, or 16-bit samples with almost no error correction. There was a debate over the use of 14-bit or 16-bit quantization. When the Sony/Philips task force designed the Compact Disc, Philips had already developed a 14-bit D/A converter, in the end,16 bits and 44.1 kilosamples per second prevailed. Philips found a way to produce 16-bit quality using its 14-bit DAC by using four times oversampling, some CDs are mastered with pre-emphasis, an artificial boost of high audio frequencies. The pre-emphasis improves the apparent signal-to-noise ratio by making use of the channels dynamic range
16.
CD-ROM
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A CD-ROM /ˌsiːˌdiːˈrɒm/ is a pre-pressed optical compact disc which contains data. The name is an acronym which stands for Compact Disc Read-Only Memory, computers can read CD-ROMs, but cannot write to CD-ROMs which are not writable or erasable. From the mid-1990s until the mid-2000s, CD-ROMs were popularly used to distribute software for computers, some CDs, called enhanced CDs, hold both computer data and audio with the latter capable of being played on a CD player, while data is only usable on a computer. An early CD-ROM format was developed by Sony and Denon, introduced at a Japanese computer show in 1984 and it was an extension of Compact Disc Digital Audio, and adapted the format to hold any form of digital data, with a capacity of 540 MiB. The Yellow Book is the standard that defines the format of CD-ROMs. One of a set of books that contain the technical specifications for all CD formats. CD-ROMs are identical in appearance to audio CDs, and data are stored and retrieved in a similar manner. Discs are made from a 1.2 mm thick disc of polycarbonate plastic, data is stored on the disc as a series of microscopic indentations. A laser is shone onto the surface of the disc to read the pattern of pits. This pattern of changing intensity of the beam is converted into binary data. Several formats are used for data stored on discs, known as the Rainbow Books. The Yellow Book, published in 1988, defines the specifications for CD-ROMs, the CD-ROM standard builds on top of the original Red Book CD-DA standard for CD audio. Other standards, such as the White Book for Video CDs, the Yellow Book itself is not freely available, but the standards with the corresponding content can be downloaded for free from ISO or ECMA. There are several standards that define how to structure data files on a CD-ROM, ISO9660 defines the standard file system for a CD-ROM. ISO13490 is an improvement on this standard which adds support for non-sequential write-once and re-writeable discs such as CD-R and CD-RW, as well as multiple sessions. The ISO13346 standard was designed to address most of the shortcomings of ISO9660, and a subset of it evolved into the UDF format, which was adopted for DVDs. The bootable CD specification was issued in January 1995, to make a CD emulate a hard disk or floppy disk, is called El Torito, data stored on CD-ROMs follows the standard CD data encoding techniques described in the Red Book specification. This includes cross-interleaved Reed–Solomon coding, eight-to-fourteen modulation, and the use of pits, the structures used to group data on a CD-ROM are also derived from the Red Book
17.
CD-R
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CD-R is a digital optical disc storage format. A CD-R disc is a disc that can be written once. CD-R disks are readable by most plain CD readers, i. e. CD readers manufactured prior to the introduction of CD-R and this is an advantage over CD-RW, which can be re-written but cannot be played on many plain CD readers. The CD-R, originally named CD Write-Once, specification was first published in 1988 by Philips, the Orange Book consists of several parts, furnishing details of the CD-WO, CD-MO, and CD-RW. The latest editions have abandoned the use of the term CD-WO in favor of CD-R, written CD-Rs and CD-RWs are, in the aspect of low-level encoding and data format, fully compatible with the audio CD and data CD standards. This means they use Eight-to-Fourteen Modulation, CIRC error correction, and, for CD-ROM, properly written CD-R discs on blanks of less than 80 minutes length are fully compatible with the audio CD and CD-ROM standards in all details including physical specifications. 80 minute CD-R discs marginally violate the Red Book physical format specifications, CD-RW discs have lower reflectivity than CD-R or pressed CDs and for this reason cannot meet the Red Book standard. Some hardware compatible with Red Book CDs may have difficulty reading CD-Rs and, because of their lower reflectivity, especially CD-RWs. To the extent that CD hardware can read extended-length discs or CD-RW discs, it is because that hardware has capability beyond the minimum required by the Red Book and Yellow Book standards. The dye materials developed by Taiyo Yuden made it possible for CD-R discs to be compatible with Audio CD, a standard CD-R is a 1.2 mm thick disc made of polycarbonate about 120 mm or 80 mm diameter. The 120 mm disc has a capacity of 74 minutes of audio or 650 Megabytes of data. Despite the foregoing, most CD-Rs on the market have an 80-minute capacity, there are also 90 minute/790 MiB and 99 minute/870 MiB discs, although they are less common. Also, due to the limitations of the structures in the ATIP,90 and 99 minute blanks will identify as 80 minute ones. Therefore, in order to use the capacity, these discs have to be burned using overburn options in the CD recording software. Nothing in the Red, Yellow or Orange Book standards prohibits disc reading/writing devices from having the capacity to read or write discs beyond the Compact Disc standards, the polycarbonate disc contains a spiral groove, called the pregroove, to guide the laser beam upon writing and reading information. The polycarbonate disc is coated on the side with a very thin layer of organic dye. Then, on top of the dye is coated a thin, reflecting layer of silver, finally, a protective coating of a photo-polymerizable lacquer is applied on top of the metal reflector and cured with UV-light. A blank CD-R is not empty, the pregroove has a wobble, maintaining a constant rate is essential to ensure proper size and spacing of the pits and lands burned into the dye layer
18.
CD-RW
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CD-RW is a digital optical disc storage format. A CD-RW disc is a disc that can be written, read arbitrarily many times, erased. The technology was introduced in 1997, CD-RW discs require readers that have more sensitive laser optics than are required to read plain CDs. Consequently, CD-RWs cannot be read in many CD readers built prior to the introduction of CD-RW, CD-ROM drives that bear a MultiRead certification claim compatibility. CD-RW discs need to be blanked before reuse, fast blanking is much quicker, and is usually sufficient to allow rewriting the disc. Full blanking removes traces of the data, often for confidentiality reasons. It may be possible to data from full-blanked CD-RWs with specialty data recovery equipment, however. Their ideal usage field is in the creation of test discs, temporary short or mid-term backups, and in general, the CD-MO standard also allowed for an optional non-erasable zone on the disc, which could be read by normal CD-ROM reader units. Reading of the discs relied on the Kerr effect, the format was never released commercially, mostly because of its inherent incompatibility with standard CD reading units. A similar situation was present for early CD-R media, which suffered from either physical or logical incompatibilities. There were however some magneto-optical drives and media with the form factor that dont have this limitation. Unlike modern CD-RWs, CD-MO allowed for hybrid discs containing both an unmodifiable, pressed section, readable in standard drives, and a writable MO section, other kinds of magneto-optical media, unbound by the limitations of the typical CD-ROM filesystems, took the place intended for CD-MO. Rewritable media can, with hardware, according to some manufacturers. The CD-RW technology is based on phase change technology, so the degree of reflection reached is only 15–25%, the properties of the medium and the write and erase procedure is defined in the Orange Book Part III. To keep rotational speed precise, tracks have a slight superimposed sinusoidal excursion of 0.3 µm at a frequency of 22.05 kHz, in addition a 1 kHz frequency modulation is applied to provide the recorder with an absolute time reference. The grooves have a width of 0.6 µm and pitch of 1.6 µm, the media for CD-RW has basically the same layers as CD-R media. The reflective layer is, however, an alloy, which has in its original state. When writing the laser beam uses its power to heat the material to 500–700 °C
19.
Super Audio CD
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Super Audio CD is a read-only optical disc for audio storage, introduced in 1999. It was developed jointly by Sony and Philips Electronics, and intended to be the successor to their Compact Disc format, having made little impact in the consumer audio market, by 2007, SACD was deemed to be a failure by the press. A small market for SACD has remained, serving the audiophile community, the Super Audio CD format was introduced in 1999. Royal Philips and Crest Digital partnered in May 2002 to develop and install the first SACD hybrid disc production line in the USA, SACD did not achieve the same level of growth that Compact discs enjoyed in the 1980s, and was not accepted by the mainstream market. By October 2009, record companies had published more than 6,000 SACD releases, jazz and popular music albums, mainly remastered previous releases, were the next two most numerous genres represented. Many popular artists have released some or all of their catalog on SACD. Pink Floyds album The Dark Side of the Moon sold over 800,000 copies by June 2004 in its SACD Surround Sound edition, the Whos rock opera Tommy, and Roxy Musics Avalon, were released on SACD to take advantage of the formats multi-channel capability. All three albums were remixed in 5.1 surround, and released as hybrid SACDs with a mix on the standard CD layer. Some popular artists have released new recordings on SACD, sales figures for Stings Sacred Love album reached number one on SACD sales charts in four European countries in June 2004. Between 2007 and 2008, Genesis re-released all of their studio albums across three box sets, each album in these sets contains the original album on SACD in both stereo and 5.1 mixes. The US & Canada versions do not use SACD but CD instead, by August 2009443 labels had released one or more SACDs. Instead of depending on major label support, some orchestras and artists have released SACDs on their own, many of the SACD discs that were released from 2000-2005 are now out of print and are available only on the used market. By 2009, the record companies were no longer regularly releasing discs in the format. SACD is a disc of identical physical dimensions as a compact disc. There are three types of disc, Hybrid, Hybrid SACDs are encoded with a 4.7 GB DSD layer, single-layer, A DVD-5 encoded with one 4.7 GB DSD layer. Dual-layer, A DVD-9 encoded with two DSD layers, totaling 8.5 GB, and no PCM layer, dual-layer SACDs can store nearly twice as much data as a single-layer SACD. Unlike hybrid discs, both single- and dual-layer SACDs are incompatible with conventional CD players and cannot be played on them, a stereo SACD recording has an uncompressed rate of 5.6 Mbit/s, four times the rate for Red Book CD stereo audio. Other technical parameters are as follows, Commercial releases commonly included both surround sound and stereo mixes on the SACD layer, some reissues however, retained the mixes of earlier multi-channel formats
20.
Photo CD
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Photo CD is a system designed by Kodak for digitizing and saving photos in a CD. Launched in 1992, the discs were designed to hold nearly 100 high quality images, scanned prints, Photo CDs are defined in the Beige Book and conform to the CD-ROM XA and CD-i Bridge specifications as well. They were intended to play on CD-i players, Photo CD players, furthermore, Photo CD relied on CRT-based TV sets for home use. However, these were designed for moving pictures and their typical flicker became an issue when watching still photographs. The Photo CD system gained a level of acceptance among professional photographers due to the low cost of the high quality film scans. Prior to Photo CD, professionals who wished to digitize their film images were forced to pay higher fees to obtain drum scans of their film negatives and transparencies. The Kodak Pro Photo CD Master Disc contains 25 images with resolution of 6144 x 4096 pixels. This type is appropriate for 120 film, 4x5, but also for small picture film, separate from the Photo CD format is Kodaks proprietary Portfolio CD format, which combines Red Book CD audio and Beige Book PCD with interactive menus and hotspots on PCD images. Some standalone Philips Photo/Audio CD players could play Portfolio CDs, the Kodak Portfolio CD is not defined in any particular Rainbow Book. The Photo CD system was announced by Kodak in 1990, Photo CD targeted a full range of photographic needs, ranging from consumer level point-and-shoot cameras to high-end professionals using large format 4x5 sheet film. The first Photo CD products, including scanners for processing labs and Photo CD players for consumers, the project was expected to be a $600 million business by 1997 with $100 million in operational earnings. Kodak entered into a number of partnerships grow the usage of Photo CD and this included, for example, an arrangement with L. L. These measures, together with the relatively low cost of $3 per image and convenience. For example, a 16Base Photo CD image of 5.5 Mb can be encoded as a JPEG image of 2.1 Mb at 80% quality, when the Photo CD format was designed in the early 1990s, a design goal was to allow low cost playback-to-TV devices. While the pixel resolution of Photo CD was still comparable or better than the alternatives, firstly, the Photo CD color space, designed for TV display, is smaller than what can be achieved by even a low cost desktop scanner. Secondly, the rendition of Photo CD images changed over time. Thirdly, the range of scans was lower than for desktop scanners. Tests at the time indicated that the rating of Photo CD was 2. 8-3.0, while commonly available desktop scanners were reaching 4.2
21.
CD+G
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CD+G is an extension of the compact disc standard that can present low-resolution graphics alongside the audio data on the disc when played on a compatible device. CD+G discs are used for karaoke machines, which use this functionality to present on-screen lyrics for the song contained on the disc. The CD+G specifications were published by Philips and Sony in a revision of the Red Book specifications. The first CD to be released with CD+G graphics was Eat or Be Eaten by Firesign Theatre in 1985, the CD+EG is a similar format that allows for better graphics, but has been used very rarely. Some CD-ROM drives can read this data. Pioneers LaserActive player can also play CD+G discs, as long as either the PAC-S1/S-10 or PAC-N1/N10 game modules are installed, since 2003, some standalone DVD players have supported the CD+G format. The CD+G format takes advantage of the subcode channels R through W and these six bits store graphics information. In the CD+G system, 16-color graphics are displayed on a field which is 300×216 pixels in size. Compact disc Karaoke MP3+G The CD+G Museum and Discography, details on released titles and how to identify them CD+G faq
22.
CD-Text
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CD-Text is an extension of the Red Book Compact Disc specifications standard for audio CDs. It allows for storage of information on a standards-compliant audio CD. The specification for CD-Text was included in the Multi-Media Commands Set 3 R01 standard, released in September 1996 and it was also added to new revisions of the Red Book. The actual text is stored in a compatible with Interactive Text Transmission System. The ITTS standard is applied in the MiniDisc format, as well as in Digital Audio Broadcasting technology. The CD-Text information is stored in the subchannels R to W on the disc and this information is usually stored in the subchannels in the lead-in area of the disc, where there is roughly five kilobytes of space available. It can also be stored on the program area of the disc. Since the R to W channels are not used in the Red Book specification of audio CDs, they are not read by all CD players, of these, three are reserved and therefore they dont have keywords. The character encoding is not specified, and there is no provision for indicating in the CD-Text data which encoding is in use, the original Sony authoring tools and specifications supported ASCII and two of its supersets, ISO-8859-1 and MS-JIS. Annex J of the MMC-2 specification mentions only ASCII, but provides for double byte character codes to be indicated, cdrdao, Linux command line tool that supports writing CD-Text. CDRWIN can burn CD-Text Exact Audio Copy has support for reading CD-Text to fill in artist/title information when ripping CDs, foobar2000 Since version 1.0 has support for reading CD-Text to fill in artist/title information when playing and ripping CDs. Fre, ac has support for reading CD-Text to fill in artist/title information when ripping CDs, icedax, Linux command line tool that supports reading CD-Text. This information can be added/modified during the creation of a. CUE file, isoBuster copies CD-Text when a CD is ripped in raw format and saves it to a. cdt file. ITunes 7 or higher supports burning CD Text and it is by default an unchecked option in the burning preferences. K3b has support for reading and writing CD-Text on Linux, Media Player Classic reads from CD-Text and will automatically display track title and author. MusicBee audio player/organizer can read CD-Text when playing or ripping CDs, nero Burning ROM can burn CD-Text since version 5.5.10, its track saving utility can read CD-Text when ripping. RealPlayer 10 supports reading and writing of CD-Text Sound Juicer can read from CD-Text Toast on Mac OS X has support for CD-Text, VLC media player can read CD-Text on all platforms Winamp has had support for reading CD-Text since version 5.31, but does not write CD-Text. Windows Media Player 10 and higher with the WMPCDText plug-in supports reading CD-Text, x-CD-Roast for Linux has had reading/writing support since version 0. 98alpha10
23.
Green Book (CD standard)
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The standard was originally not freely available and had to be licensed from Philips. However, the 1994 version of the standard was made available for free by Philips. CD-i discs conform to the Red Book specification of audio CDs, tracks on a CD-is program area can be CD-DA tracks or CD-i tracks, but the first track must always be a CD-i track, and all CD-i tracks must be grouped together at the beginning of the area. CD-i tracks are structured according to the CD-ROM XA specification, and have different classes depending on their contents, message sectors contain audio data to warn users of CD players that the track they are trying to listen to is a CD-i track and not a CD-DA track. The CD-i specification also specifies a system similar to ISO9660 to be used on CD-i tracks. The CD-i Ready format is a type of format, also designed by Philips. This format puts CD-i software and data into the pregap of Track 1, the CD-i Bridge format, defined in Philips White Book, is a transitional format allowing bridge discs to be played both on CD-ROM drives and on CD-i players
24.
DVD
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DVD is a digital optical disc storage format invented and developed by Philips, Sony, Toshiba, and Panasonic in 1995. The medium can store any kind of data and is widely used for software. DVDs offer higher capacity than compact discs while having the same dimensions. Pre-recorded DVDs are mass-produced using molding machines that physically stamp data onto the DVD, such discs are a form of DVD-ROM because data can only be read and not written or erased. Blank recordable DVD discs can be recorded using a DVD recorder. Rewritable DVDs can be recorded and erased many times, DVDs containing other types of information may be referred to as DVD data discs. The OED also states that in 1995, The companies said the name of the format will simply be DVD. Toshiba had been using the name ‘digital video disk’, but that was switched to ‘digital versatile disk’ after computer companies complained that it left out their applications, Digital versatile disc is the explanation provided in a DVD Forum Primer from 2000 and in the DVD Forums mission statement. There were several formats developed for recording video on optical discs before the DVD, Optical recording technology was invented by David Paul Gregg and James Russell in 1958 and first patented in 1961. A consumer optical disc data format known as LaserDisc was developed in the United States and it used much larger discs than the later formats. CD Video used analog video encoding on optical discs matching the established standard 120 mm size of audio CDs, Video CD became one of the first formats for distributing digitally encoded films in this format, in 1993. In the same year, two new optical disc formats were being developed. By the time of the launches for both formats in January 1995, the MMCD nomenclature had been dropped, and Philips and Sony were referring to their format as Digital Video Disc. Representatives from the SD camp asked IBM for advice on the system to use for their disc. Alan E. Bell, a researcher from IBMs Almaden Research Center, got that request and this group was referred to as the Technical Working Group, or TWG. On August 14,1995, an ad hoc group formed from five computer companies issued a release stating that they would only accept a single format. The TWG voted to both formats unless the two camps agreed on a single, converged standard. They recruited Lou Gerstner, president of IBM, to pressure the executives of the warring factions, as a result, the DVD specification provided a storage capacity of 4.7 GB for a single-layered, single-sided disc and 8.5 GB for a dual-layered, single-sided disc
25.
DVD recordable
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DVD recordable and DVD rewritable refer to part of optical disc recording technologies. DVD recordable is a term that refers to both write-once and rewritable formats, whereas DVD rewritable refers only to rewritable formats. Like CD-Rs, DVD recordables use dyes, depending on the intensity of the laser, the reflective property of the dye on a particular spot will determine whether it is a peak or a valley representation from pressed DVD. Dyes give the side of a disc a distinct color. Dyes are also the playback is not guaranteed. Their reflective properties are not as good as with stamped DVDs that commonly have aluminum as the reflective layer, the larger storage capacity of a DVD-R compared to a CD-R is achieved through smaller pit size and smaller track pitch of the groove spiral which guides the laser beam. Consequently, more pits can be written on the same physical sized disc, in order to write smaller pits onto the recording dye layer, a red laser beam with a wavelength of 640 nm is used in conjunction with a higher numerical aperture lens. Because of this wavelength, DVDs use different dyes from CDs to properly absorb this wavelength. The R format DVDs can be once and read arbitrarily many times. Thus, R format discs are suited to such as non-volatile data storage, audio. This can cause confusion because the DVD+RW Alliance logo is a stylized RW, thus, a DVD+R disc may have the RW logo, but it is not rewritable. According to Pioneer, DVD-RW discs may be written to about 1,000 times before needing replacement, RW discs are commonly used to store data in a volatile format, such as when creating backups or collections of files. They are also used for home DVD video recorders, one benefit to using a rewritable disc is, if there are writing errors when recording data, the disc is not ruined and can still store data by erasing the faulty data. The DVD-R format was developed by Pioneer in 1997 and it is supported by most normal DVD players and is approved by the DVD Forum. Has broader playback compatibility than the + especially with older players. The dash format uses a land pre-pit method to provide sector address information, DVD minus R is not correct, according to DVD-R consortium recommendations, it is, in fact, a dash. DVD-R and DVD+R technologies are not directly compatible, which created a war in the DVD technology industry. To reconcile the two competing formats, manufacturers created hybrid drives that could read both — most hybrid drives that handle both formats are labeled DVD±R and Super Multi and are very popular, developed by Philips and Sony with their DVD+RW Alliance
26.
DVD+R DL
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DVD+R DL also called DVD+R9, is a derivative of the DVD+R format created by the DVD+RW Alliance. Its use was first demonstrated in October 2003, DVD+R DL discs employ two recordable dye layers, each capable of storing nearly the 4.7 GB capacity of a single-layer disc, almost doubling the total disc capacity to 8.5 GB. Discs can be read in many DVD devices and can only be created using DVD+R DL, DL drives started appearing on the market during mid-2004, at prices comparable to those of existing single-layer drives. As of March 2011 DL media is up to twice as expensive as single-layer media, the latest DL drives write double layer discs at a slower rate than current single-layer discs. Dual-layer recording allows DVD-R and DVD+R discs to store more data, up to 8.5 gigabytes per disc. DVD-R DL was developed for the DVD Forum by Pioneer Corporation, while DVD+R DL was developed for the DVD+RW Alliance by Philips, a dual-layer disc differs from its usual DVD counterpart by employing a second physical layer within the disc itself. The drive with dual-layer capability accesses the second layer by shining the laser through the first semi-transparent layer, the layer change can exhibit a noticeable pause in some DVD players, up to several seconds. DVD recordable discs supporting this technology are compatible with some existing DVD players. Many current DVD recorders support dual-layer technology, and the price is now comparable to that of single-layer drives, the recording speeds reached by dual-layer media are still well below those of single-layer media. There are two modes for dual-layer orientation, parallel track path and opposite track path, in PTP mode, used for DVD-ROM, both layers start recording at the inside diameter with the lead-in and end at the outside diameter with the lead-out. Sectors are sequenced from the beginning of the first layer to the end of the first layer, in OTP mode, the second layer is read from the outside of the disk. For DVD-Video a variation of the technique is employed and this means that the start of the second layer may not have any recorded material present. This is in order to minimise the time that the player takes to locate and focus on the second layer. A common misconception is that the disc spins first in one direction, and then another, either for PTP or OTP recording, when in fact DVD-Writers always spin a disc in the clockwise direction. A simpler way to understand whats written above is to think of the hole in the centre of the DVD as the inside. This results in the skipping or freezing up for some time as the laser head repositions itself. For comparison, the table below shows storage capacities of the four most common DVD recordable media, stands for standard single-layer discs, while DL denotes the dual-layer variants. See articles on the formats in question for information on compatibility issues, DVD-R DL DVD DVD+R DVD+RW DVD+RW DL Book type MultiLevel Recording Bennett, Hugh
27.
DVD-Audio
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DVD-Audio is a digital format for delivering high-fidelity audio content on a DVD. DVD-Audio uses most of the storage on the disc for high-quality audio and is not intended to be a delivery format. DVD-Audio has much higher quality than video DVDs containing concert films or music videos. The first discs entered the marketplace in 2000, DVD-Audio offers many possible configurations of audio channels, ranging from single-channel mono to 5. 1-channel surround sound, at various sampling frequencies and sample rates. Audio on a DVD-Audio disc can be stored in different bit depth/sampling rate/channel combinations. For instance, a DVD-Audio disc may contain a 96 kHz/24-bit 5. 1-channel audio track as well as a 192 kHz/24-bit stereo audio track, also, the channels of a track can be split into two groups stored at different resolutions. For example, the front speakers could be 96/24, while the surrounds are 48/20, Audio is stored on the disc in Linear PCM format, which is either uncompressed or losslessly compressed with MLP. The maximum permissible total bit rate is 9.6 Megabits per second, channel/resolution combinations that would exceed this need to be compressed. In uncompressed modes, it is possible to get up to 96/16 or 48/24 in 5.1, to store 5.1 tracks in 88. 2/20,88. 2/24, 96/20 or 96/24 MLP encoding is mandatory. If no native stereo audio exists on the disc, the DVD-Audio player may be able to downmix the 5. 1-channel audio to two-channel stereo audio if the listener does not have a surround sound setup. Downmixing can only be done to two-channel stereo, not to other configurations, with the introduction of the DVD-Audio format, some kind of backward compatibility with existing DVD-Video players was desired, although not required. To address this, most DVD-Audio discs also contain DVD-Video compatible data to play the standard DVD-Video Dolby Digital 5. 1-channel audio track on the disc. Many DVD-Video players also offer the option to create a Dolby MP matrix-encoded soundtrack for older surround sound systems lacking Dolby Digital or DTS decoding, some discs also include a native Dolby Digital 2.0 stereo, and even a DTS 96/245. 1-channel, audio track. Since the DVD-Audio format is a member of the DVD family, a disc can have multiple layers. A common configuration is a single-sided DVD with content in both the DVD-Video and DVD-Audio directories, the high-resolution, Packed PCM audio encoded using MLP is only playable by DVD players containing DVD-Audio decoding capability. DVD-Video content, which can include LPCM, Dolby or DTS material, other disc configurations may consist of double layer DVDs or two-sided discs. Some labels have released two-sided DVD titles that contain DVD-Audio content on one side and DVD-Video content on the other, unofficial playback of DVD-Audio on a PC is possible through freeware audio player foobar2000 for Windows using an open source plug-in extension called DVDADecoder. VLC media player has DVD-Audio support Cyberlinks PowerDVD Version 8 provides a method of playing DVD-Audio discs
28.
EcoDisc
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An EcoDisc is a patented type of DVD which is thinner than a conventional DVD because it is made from a single layer of polycarbonate instead of two layers glued together. Ecodiscs are prone to breakage since they are, as of May 2011, EcoDisc Technology AG licences manufacturers of the discs, and also holds the rights to the EcoDisc logo. The maximum capacity of the discs is 4.7 GB, although earlier versions of the EcoDisc occasionally showed problems with Slot-In drives, these problems have since been remedied. Are we going green or is it business as usual
29.
Blu-ray
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Blu-ray or Blu-ray Disc is a digital optical disc data storage format. It was designed to supersede the DVD format, in that it is capable of storing high-definition, the plastic disc is 120 mm in diameter and 1.2 mm thick, the same size as DVDs and CDs. Conventional Blu-ray Disc discs contain 25 GB per layer, with dual layer discs being the standard for feature-length video discs. Triple-layer discs and quadruple layers are available for BD-XL re-writer drives, the name Blu-ray refers to the blue laser used to read the disc, which allows information to be stored at a greater density than is possible with the longer-wavelength red laser used for DVDs. The main application of Blu-ray is as a medium for video material such as films and physical distribution of video games for the PlayStation 3, PlayStation 4. Besides the hardware specifications, Blu-ray is associated with a set of multimedia formats, high-definition video may be stored on Blu-ray discs with up to 2160p resolution, at up to 60 frames per second. DVD discs had been limited to a resolution of 480p or 576p. The BD format was developed by the Blu-ray Disc Association, a group representing makers of consumer electronics, computer hardware, Sony unveiled the first Blu-ray disc prototypes in October 2000, and the first prototype player was released in April 2003 in Japan. Afterwards, it continued to be developed until its release in June 2006. During the high definition disc format war, Blu-ray Disc competed with the HD DVD format. Toshiba, the company that supported HD DVD, conceded in February 2008. According to Media Research, high-definition software sales in the US were slower in the first two years than DVD software sales, Blu-ray faces competition from video on demand and the continued sale of DVDs. As of January 2016, 44% of U. S. broadband households had a Blu-ray player, the information density of the DVD format was limited by the wavelength of the laser diodes used. Following protracted development, blue laser diodes operating at 405 nanometers became available on a production basis, Sony started two projects in collaboration with Philips applying the new diodes, UDO, and DVR Blue, a format of rewritable discs that would eventually become Blu-ray Disc. The core technologies of the formats are similar, the first DVR Blue prototypes were unveiled at the CEATEC exhibition in October 2000 by Sony. A trademark for the Blue Disc logo was filed February 9,2001, on February 19,2002, the project was officially announced as Blu-ray Disc, and Blu-ray Disc Founders was founded by the nine initial members. The first consumer device arrived in stores on April 10,2003, the Sony BDZ-S77, but there was no standard for prerecorded video, and no movies were released for this player. On October 4,2004, the name Blu-ray Disc Founders was officially changed to the Blu-ray Disc Association, the Blu-ray Disc physical specifications were completed in 2004
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Blu-ray Disc recordable
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Blu-ray Disc Recordable refers to two direct to disc optical disc recording technologies that can be recorded on to an optical disc with an optical disc recorder. BD-R discs can be written to once, whereas BD-RE can be erased and re-recorded multiple times, Disc capacities are 25 GB for single-layer discs,50 GB for double-layer discs,100 GB for triple-layer, and 128 GB for quadruple-layer. The minimum speed at which a Blu-ray Disc can be written is 36 megabits per second, there are four versions of Blu-ray Disc Recordable Erasable and three versions of Blu-ray Disc Recordable. Each version includes three Parts, Basic Format Specifications, File System Specifications, Audio Visual Basic Specifications, however, BD recording media are inapplicable. This book is attached to Part 1 Basic Format Specifications of every format, low To High refers to the reflectivity changing from low to high during the burning process, which is the opposite of normal. The advantage of BD-R LTH is it can protect a manufacturers investment in DVD-R/CD-R manufacturing equipment, the manufacturer need only modify current equipment, it need not invest in new production lines. This is expected to lower the cost of disc manufacturing, old Blu-ray players and recorders cannot utilize BD-R LTH, however, a firmware upgrade can enable devices to access BD-R LTH. Panasonic released such a firmware update in November 2007 for its DMR-BW200, DMR-BR100 and MR-BW900/BW800/BW700 models, pioneer was expected to ship the first LTH BD drives in Spring 2008. Sony upgraded the PlayStation 3 firmware enabling BD-R LTH reading in March,2008, in 2011, Frances Ministry of Culture and Communication conducted a study on the suitability of data archival of LTH discs compared to HTL discs. The data they collected indicated that the quality of LTH discs is worse than HTL discs. Optical disc authoring Blu-ray Player BD-R Compatibility Chart
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Ultra HD Blu-ray
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Ultra HD Blu-ray is a digital optical disc data storage format that supersedes Blu-ray. Ultra HD Blu-ray discs are incompatible with existing Blu-ray players, Ultra HD Blu-ray supports 4K UHD video at frame rates up to 60 frames per second, encoded using High Efficiency Video Coding. The discs support both high dynamic range by increasing the depth to 10-bit per color and a greater color gamut than supported by conventional Blu-ray video by using the Rec.2020 color space. The specification allows for three disc sizes, each with their own rate,50 GB with 82 Mbit/s,66 GB with 108 Mbit/s. Ultra HD Blu-ray technology was licensed in mid 2015, and players had a release date of Christmas 2015. Ultra HD Blu-ray uses a new revision of AACS DRM, AACS2, on May 12,2015, the Blu-ray Disc Association revealed completed specifications and the official Ultra HD Blu-ray logo. Unlike conventional DVDs and Blu-rays, the new 4K format does not have region coding, on March 1,2016, the BDA released Ultra HD Blu-ray with mandatory support for HDR10 Media Profile video and optional support for Dolby Vision. The first Ultra HD 4K Blu-ray Discs were officially released from four studios on March 1,2016 and these were Sony, Lionsgate, Warner Bros. and 20th Century Fox
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Universal Media Disc
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The Universal Media Disc is a discontinued optical disc medium developed by Sony for use on their PlayStation Portable handheld gaming and multimedia platform. It can hold up to 1.8 gigabytes of data and is capable of housing video games, feature-length films, UMD was the trademark of Sony Computer Entertainment Inc. for their optical disk cartridge. The video is encoded in the H. 264/MPEG-4 AVC format, Video stored on UMD is typically encoded in 720×480 resolution, but is scaled down when displayed on the PSP. The American punk rock band The Offspring released their Complete Music Video Collection on the format, the BBC released a number of its programs on UMD in the UK, including The Office, The Mighty Boosh, Doctor Who and Little Britain. Some adult films have been released on UMD in Japan, eCMA-365, Data Interchange on 60 mm Read-Only ODC – Capacity,1.8 GB Dimensions, approx. Protective Shutter, Similar to the MiniDisc and 3½-inch floppy disk, Auto-Loading, UMDs were designed for possible future slot loading devices with Auto-Loading mechanisms. These would be similar to the auto-loading mechanism used in slot loading MiniDisc home. It would also be similar to the Sony U-Matic auto-loading mechanism, unlike the current clamshell loading design the PSP uses, a slot loading device using an Auto-Loading mechanism would be motorized and completely automatic. The user would insert the disc into the slot, the motorized mechanism would then take over. The disc would also be ejected fully automatically by the motorized mechanism and this would also mean that power would be required in order to insert or eject a disc. PSPs were also not made compatible with MiniDiscs, DVD region coding has been applied to most UMD movies and music. However regional lockout is not applied to games, making them region-free, the UMD format never saw implementation on any device other than the PlayStation Portable, and as a result the market is very limited compared to those for other optical media formats. Buyers were generally put off by the price of UMD releases. Poor sales of UMD movies early in the life had caused major studios Universal. Retail support of the format experienced similar troubles, and in 2006 Wal-Mart began phasing out shelf space devoted to UMD movies, since 2011, there have been no more movies released on UMD. The film Harry Potter and the Deathly Hallows – Part 2 was one of the releases on the format. However the system experienced lackluster sales compared to models, with most consumers still choosing the UMD-compatible PSP-3000 model. Still, most new games continue to be distributed via UMD, in 2011, the PSP-E1000, a budget PSP model with a UMD slot but without Wi-Fi, was released, and is the final revision of the PlayStation Portable
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Forward Versatile Disc
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The specification allows for up to three layers for total of 15GB in storage. WMV9 is used as the video codec allowing for 135 minutes of 720p video on a dual layer disc and 135 minutes of 1080i video on a 3-layer disc, FVD uses AACS copy protection which is one of the schemes used in both HD DVD and Blu-ray Discs. An FVD disc can either be an FVD-1 or FVD-2 disc, FVD-1, FVD-2, The second generation will use the more efficient 8/15 coding for increasing the ECC capability. CMC Magnetics The Register, FVD goes mass-market
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Holographic Versatile Disc
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The Holographic Versatile Disc is an optical disc technology developed between April 2004 and mid-2008 that can store up to several terabytes of data on an optical disc 10 cm or 12 cm in diameter. The reduced radius reduces cost and materials used and it employs a technique known as collinear holography, whereby a green and red laser beam are collimated in a single beam. The green laser reads data encoded as laser interference fringes from a layer near the top of the disc. A red laser is used as the beam to read servoinformation from a regular CD-style aluminium layer near the bottom. Servoinformation is used to monitor the position of the head over the disc, similar to the head, track. On a CD or DVD this servoinformation is interspersed among the data, a dichroic mirror layer between the holographic data and the servo data reflects the green laser while letting the red laser pass through. Standards for 100 GB read-only holographic discs and 200 GB recordable cartridges were published by ECMA in 2007, a number of release dates were announced, all since passed. High densities are possible by moving these closer on the tracks,100 GB at 18 μm separation,200 GB at 13 μm,500 GB at 8 μm, and most demonstrated of 5 TB for 3 μm on a 10 cm disc. The system uses a laser, with an output power of 1 watt which is high power for a consumer device laser. Possible solutions include improving the sensitivity of the used, or developing and commoditizing a laser capable of higher power output while being suitable for a consumer unit. HVD is not the technology in high-capacity, optical storage media. Such large optical storage capacities compete favorably with the Blu-ray Disc format, however, holographic drives are projected to initially cost around US$15,000, and a single disc around US$120–180, although prices are expected to fall steadily. Since InPhase Technologies were unable to deliver their product, they ran out of funds. The Holography System Development Forum is a coalition of corporations purposed to provide a forum for testing and technical discussion of all aspects of HVD design. As of March 2012, the companies are members of the forum. Kyoeisha Pulstec Shibaura Mechatronics Corporation Oracle Corporation Teijin Chemicals Ltd, on June 11,2007, TC44 published the first two HVD standards, ECMA-377, defining a 200 GB HVD recordable cartridge and ECMA-378, defining a 100 GB HVD-ROM disc. Its next stated goals are 30 GB HVD cards and submission of these standards to the International Organization for Standardization for ISO approval.6 TB media available in 2010, InPhase, a now bankrupt, company that developed a competing holographic storage format. Video explaining holographic storage – PC Magazine, October 4,2006 Holography system rides single beam EE Times, February 27,2006 – interview with Hideyoshi Horimai and Yoshio Aoki of Optware Corp
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HD DVD
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HD DVD is a discontinued high-density optical disc format for storing data and playback of high-definition video. Supported principally by Toshiba, HD DVD was envisioned to be the successor to the standard DVD format, on 19 February 2008, after a protracted format war with rival Blu-ray, Toshiba abandoned the format, announcing it would no longer develop or manufacture HD DVD players and drives. The HD DVD Promotion Group was dissolved on March 28,2008, the HD DVD physical disc specifications were still in use as the basis for the China Blue High-definition Disc formerly called CH-DVD. Because all variants except 3× DVD and HD REC employed a laser with a shorter wavelength. In the late 1990s, commercial HDTV sets started to enter a larger market, jVCs D-VHS and Sonys HDCAM formats could store that amount of data, but were neither popular nor well-known. It was well known that using lasers with shorter wavelengths would yield optical storage with higher density, shuji Nakamura invented practical blue laser diodes, but a lengthy patent lawsuit delayed commercial introduction. The two formats share several technologies, in February 2002, the project was officially announced as Blu-ray Disc, and the Blu-ray Disc Association was founded by the nine initial members. The DVD Forum was deeply split over whether to go with the more expensive blue lasers or not, in March 2002, the forum voted to approve a proposal endorsed by Warner Bros. and other motion picture studios that involved compressing HD content onto dual-layer DVD-9 discs. In spite of this decision, the DVD Forums Steering Committee announced in April that it was pursuing its own blue-laser high-definition solution, in August, Toshiba and NEC announced their competing standard Advanced Optical Disc. It was adopted by the DVD forum and renamed to HD DVD the next year, the HD DVD Promotion Group was a group of manufacturers and media studios formed to exchange thoughts and ideas to help promote the format worldwide. The HD DVD promotion group was dissolved on March 28,2008, following Toshibas announcement on February 19,2008 that it would no longer develop or manufacture HD DVD players. Much like the VHS vs. Betamax videotape format war during the late 1970s and early 1980s, HD DVD was competing with a rival format - in this case, in 2008, major content manufacturers and key retailers began withdrawing their support for the format. In an attempt to avoid a costly war, the Blu-ray Disc Association. One of the issues was that Blu-ray Disc companies wanted to use a Java-based platform for interactivity, another problem was the physical formats of the discs themselves. The negotiations proceeded slowly and ultimately stalled, on August 22,2005, the Blu-ray Disc Association and DVD Forum announced that the negotiations to unify their standards had failed. Rumors surfaced that talks had stalled, publicly, the reasons of physical format incompatibility were cited. By the end of September that year, Microsoft and Intel jointly announced their support for HD DVD, the Blu-ray Disc Association did not agree to HPs demands. On March 31,2006, Toshiba released their first consumer-based HD DVD player in Japan at ¥110,000, HD DVD was released in the United States on April 18,2006, with players priced at $499 and $799
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Versatile Multilayer Disc
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Versatile Multilayer Disc is a high-capacity red laser optical disc technology designed by New Medium Enterprises, Inc. VMD was intended to compete with the blue laser Blu-ray Disc format and had a capacity of up to 30GB per side. At CeBIT in March 2006, NME demonstrated a prototype VMD player, at the Custom Electronic Design & Installation Association trade show in September 2007, NME exhibited two players set for release in October 2007. There were 20 US titles available at time, including some from Icon Productions, Paramount Pictures, Walt Disney Pictures, New Line Cinema, DreamWorks SKG, Lionsgate. They also signed a deal with Bollywood production company Eros Group who intended to release 50 Bollywood features on the format, the two initial players to be released were the ML622S and the ML777S. The ML777S included USB ports for connection to storage devices. The manufacturers hoped to sell the format as a lower cost alternative to other optical technologies, the date of effect of this action was 90 days after 12 June 2008. In August 2008 in the UK, New Medium Electronics Limited, New Medium Entertainment Limited, in October 2008, the technology behind HD-VMD was revived by companies - Royal Digital Media, Anthem Digital and DreamStream, to produce a new 100GB optical disc. Anthem Digitals chairman Michael Jay Solomon was the chairman of New Medium Enterprises. As of December 2010, Royal Digital Media, Anthem Digital, the format uses approximately 5 GB per layer, which was similar to standard DVDs. Standard VMDs can use 4 layers, for 20 GB of storage, the rarer 8 and 10 layered discs store 40 GB to 50 GB, respectively. One manufacturer listed up to 20 layers on a disc being possible in the future, the Blu-ray Disc uses a blue-violet laser, rather than VMDs red laser, which means Blu-ray can store more information per layer. This format has so far only utilized 1 and 2-layered versions, in January 2007, Toshiba announced development on a triple layer HD DVD that would have had a capacity of 51 GB. Hitachi announced a 4 and 6 layer version of Blu-ray as well, a standard 4-layer VMD stored 20 GB, which was comparable to a 1-layered HD DVD and 1-layer Blu-ray Disc. The HD VMD format is capable of HD resolutions up to 1080p which is comparable with Blu-ray, video is encoded in MPEG-2 and VC-1 formats at a maximum bitrate of 40 Megabits per second. This falls between the maximum bitrates of HD DVD and Blu-ray, there is the possibility that VMD discs may be encoded with the H.264 format in the future. The HD VMD format supports up to 7. 1-channel Dolby Digital, Dolby Digital Plus, comparison of high definition optical disc formats Official VMD Web Site Digital TV Designline - Here comes HD VMD ML777S model
