Digital television is the transmission of television signals, including the sound channel, using digital encoding, in contrast to the earlier television technology, analog television, in which the video and audio are carried by analog signals. It is an innovative advance that represents the first significant evolution in television technology since color television in the 1950s. Digital TV transmits in a new image format called HDTV, with greater resolution than analog TV, in a wide screen aspect ratio similar to recent movies in contrast to the narrower screen of analog TV, it makes more economical use of scarce radio spectrum space. A transition from analog to digital broadcasting began around 2006 in some countries, many industrial countries have now completed the changeover, while other countries are in various stages of adaptation. Different digital television broadcasting standards have been adopted in different parts of the world; this standard has been adopted in Europe, Asia, total about 60 countries.
Advanced Television System Committee uses eight-level vestigial sideband for terrestrial broadcasting. This standard has been adopted by 6 countries: United States, Mexico, South Korea, Dominican Republic and Honduras. Integrated Services Digital Broadcasting is a system designed to provide good reception to fixed receivers and portable or mobile receivers, it utilizes two-dimensional interleaving. It supports hierarchical transmission of up to three layers and uses MPEG-2 video and Advanced Audio Coding; this standard has been adopted in Japan and the Philippines. ISDB-T International is an adaptation of this standard using H.264/MPEG-4 AVC that been adopted in most of South America and is being embraced by Portuguese-speaking African countries. Digital Terrestrial Multimedia Broadcasting adopts time-domain synchronous OFDM technology with a pseudo-random signal frame to serve as the guard interval of the OFDM block and the training symbol; the DTMB standard has been adopted in the People's Republic including Hong Kong and Macau.
Digital Multimedia Broadcasting is a digital radio transmission technology developed in South Korea as part of the national IT project for sending multimedia such as TV, radio and datacasting to mobile devices such as mobile phones, laptops and GPS navigation systems. Digital TV's roots have been tied closely to the availability of inexpensive, high performance computers, it wasn't until the 1990s. In the mid-1980s, as Japanese consumer electronics firms forged ahead with the development of HDTV technology, as the MUSE analog format was proposed by Japan's public broadcaster NHK as a worldwide standard, Japanese advancements were seen as pacesetters that threatened to eclipse U. S. electronics companies. Until June 1990, the Japanese MUSE standard—based on an analog system—was the front-runner among the more than 23 different technical concepts under consideration. An American company, General Instrument, demonstrated the feasibility of a digital television signal; this breakthrough was of such significance that the FCC was persuaded to delay its decision on an ATV standard until a digitally based standard could be developed.
In March 1990, when it became clear that a digital standard was feasible, the FCC made a number of critical decisions. First, the Commission declared that the new ATV standard must be more than an enhanced analog signal, but be able to provide a genuine HDTV signal with at least twice the resolution of existing television images. To ensure that viewers who did not wish to buy a new digital television set could continue to receive conventional television broadcasts, it dictated that the new ATV standard must be capable of being "simulcast" on different channels; the new ATV standard allowed the new DTV signal to be based on new design principles. Although incompatible with the existing NTSC standard, the new DTV standard would be able to incorporate many improvements; the final standard adopted by the FCC did not require a single standard for scanning formats, aspect ratios, or lines of resolution. This outcome resulted from a dispute between the consumer electronics industry and the computer industry over which of the two scanning processes—interlaced or progressive—is superior.
Interlaced scanning, used in televisions worldwide, scans even-numbered lines first odd-numbered ones. Progressive scanning, the format used in computers, scans lines in sequences, from top to bottom; the computer industry argued that progressive scanning is superior because it does not "flicker" in the manner of interlaced scanning. It argued that progressive scanning enables easier connections with the Internet, is more cheaply converted to interlaced formats than vice versa; the film industry supported progressive scanning because it offers a more efficient means of converting filmed programming into digital formats. For their part, the consumer electronics industry and broadcasters argued that interlaced scanning was the only technology that could transmit the highest quality pictures feasible, i.e. 1,080 lines per picture and 1,920 pixels per line. Broadcasters favored interlaced scanning because their vast archive of interlaced
Taiwan the Republic of China, is a state in East Asia. Neighbouring states include the People's Republic of China to the west, Japan to the northeast, the Philippines to the south. Taiwan is the most populous state and largest economy, not a member of the United Nations; the island of Taiwan was inhabited by indigenous peoples for thousands of years before the 17th century, when Dutch colonialists opened the island to mass Han immigration. After a brief rule by the Kingdom of Tungning, the island was annexed in 1683 by the Qing dynasty of China, ceded to Japan in 1895. Following the surrender of Japan in 1945, the Republic of China, which had overthrown and succeeded the Qing in 1911, took control of Taiwan; the resumption of the Chinese Civil War led to the loss of the mainland to the Communists and the flight of the ROC government to Taiwan in 1949. Although the ROC government continued to claim to be the legitimate representative of China, since 1950 its effective jurisdiction has been limited to Taiwan and several small islands.
In the early 1960s, Taiwan entered a period of industrialisation. In the 1980s and early 1990s, it changed from a one-party military dictatorship to a multi-party democracy with a semi-presidential system; as a founding member, the ROC represented China in the UN until it was replaced by the PRC in 1971. The PRC has claimed sovereignty over Taiwan and refused diplomatic relations with any country that recognises the ROC; as of 2019, Taiwan maintains official ties with 16 out of 193 UN member states. Most international organisations in which the PRC participates either refuse to grant membership to Taiwan or allow it to participate only as a non-state actor. Most major powers maintain unofficial ties with Taiwan through representative offices and institutions that function as de facto embassies and consulates. In Taiwan, the major political division is between parties favouring eventual Chinese unification and promoting a Chinese identity contrasted with those aspiring to independence and promoting a Taiwanese identity, though both sides have moderated their positions to broaden their appeal.
Taiwan is a high-income advanced economy, with a skilled and educated workforce. It has the 22nd-largest economy in the world, its high-tech industry plays a key role in the global economy, it is urbanised, is one of the most densely populated countries in the world, with most of the population concentrated on the western coast. The state is ranked in terms of civil and political liberties, health care and human development. Various names for the island of Taiwan remain in use today, each derived from explorers or rulers during a particular historical period; the name Formosa dates from 1542, when Portuguese sailors sighted an uncharted island and noted it on their maps as Ilha Formosa. The name Formosa "replaced all others in European literature" and remained in common use among English speakers into the 20th century. In the early 17th century, the Dutch East India Company established a commercial post at Fort Zeelandia on a coastal sandbar called "Tayouan", after their ethnonym for a nearby Taiwanese aboriginal tribe Taivoan people, written by the Dutch and Portuguese variously as Taiouwang, Teijoan, etc.
This name was adopted into the Chinese vernacular as the name of the sandbar and nearby area. The modern word "Taiwan" is derived from this usage, seen in various forms in Chinese historical records; the area occupied by modern-day Tainan represented the first permanent settlement by both European colonists and Chinese immigrants. The settlement grew to be the island's most important trading centre and served as its capital until 1887. Use of the current Chinese name became official as early as 1684 with the establishment of Taiwan Prefecture. Through its rapid development the entire Formosan mainland became known as "Taiwan". In his Daoyi Zhilüe, Wang Dayuan used "Liuqiu" as a name for the island of Taiwan, or the part of it closest to Penghu. Elsewhere, the name was used for the Ryukyu Islands in general or Okinawa, the largest of them; the name appears in the Book of Sui and other early works, but scholars cannot agree on whether these references are to the Ryukyus, Taiwan or Luzon. The official name of the state is the "Republic of China".
Shortly after the ROC's establishment in 1912, while it was still located on the Chinese mainland, the government used the short form "China" to refer to itself, which derives from zhōng and guó, a term which developed under the Zhou dynasty in reference to its royal demesne, the name was applied to the area around Luoyi during the Eastern Zhou and to China's Central Plain before being used as an occasional synonym for the state during the Qing era. During the 1950s and 1960s, after the government had withdrawn to Taiwan upon losing the Chinese Civil War, it was referred to as "Nationalist China" to differentiate it from "Communist China", it was a member of the United Nations representing "China" until 1971, when it lost its seat to the People's Republic of China. Over subsequent decades, the Republic of China has become known as "Taiwan", after the island that comprises 99% of the territory under its control. In some contexts ROC government publications, the name is written as "
Laos the Lao People's Democratic Republic referred to by its colloquial name of Muang Lao, is a socialist state and the only landlocked country in Southeast Asia. Located at the heart of the Indochinese peninsula, Laos is bordered by Myanmar and China to the northwest, Vietnam to the east, Cambodia to the southwest, Thailand to the west and southwest. Present-day Laos traces its historic and cultural identity to the kingdom of Lan Xang Hom Khao, which existed for four centuries as one of the largest kingdoms in Southeast Asia. Due to Lan Xang's central geographical location in Southeast Asia, the kingdom became a popular hub for overland trade, becoming wealthy economically as well as culturally. After a period of internal conflict, Lan Xang broke off into three separate kingdoms—Luang Phrabang and Champasak. In 1893, it became a French protectorate, with the three territories uniting to form what is now known as the country of Laos, it gained independence in 1945 after Japanese occupation, but was recolonised by France until it won autonomy in 1949.
Laos became independent with a constitutional monarchy under Sisavang Vong. Shortly after independence, a long civil war began, which saw the communist resistance, supported by the Soviet Union, fight against, the monarchy and a number of military dictatorships, supported by the United States. After the Vietnam War ended in 1975, the Communist Pathet Lao movement came to power, seeing the end to the civil war. During the first years of Communist rule, Laos was dependent on military and economic aid supported by the Soviet Union until its dissolution in 1991. In 2018, the country had the fourth highest GDP per capita in Indochina, after Singapore and Thailand. In the same year, the country ranked 139th on the Human Development Index, indicating medium development. Laos is a member of the Asia-Pacific Trade Agreement, Association of Southeast Asian Nations, East Asia Summit and La Francophonie. Laos applied for membership of the World Trade Organization in 1997, it is a one-party socialist republic espousing Marxism–Leninism governed by the Lao People's Revolutionary Party.
The capital and largest city is Vientiane. Other major cities include Luang Prabang and Pakse; the official language is Lao. Laos is a multi-ethnic country, with the politically and culturally dominant Lao people making up about 55 percent of the population in the lowlands. Mon-Khmer groups, the Hmong and other indigenous hill tribes, accounting for 45 percent of the population, live in the foothills and mountains. Laos's strategies for development are based on generating electricity from its rivers and selling the power to its neighbours, namely Thailand and Vietnam, as well as its initiative to become a "land-linked" nation, shown by the construction of four new railways connecting Laos to its neighbours. Laos has been referred to as one of East Asia and Pacific's Fastest Growing Economies by the World Bank, with annual GDP growth averaging 7.8% for the past decade. The English word Laos was coined by the French, who united the three Lao kingdoms in French Indochina in 1893 and named the country as the plural of the dominant and most common ethnic group, which are the Lao people.
In the Lao language, the country's name is "Muang Lao" or "Pathet Lao", both mean "Lao Country". An ancient human skull was recovered from the Tam Pa Ling Cave in the Annamite Mountains in northern Laos. Stone artifacts including Hoabinhian types have been found at sites dating to the Late Pleistocene in northern Laos. Archaeological evidence suggests agriculturist society developed during the 4th millennium BC. Burial jars and other kinds of sepulchers suggest a complex society in which bronze objects appeared around 1500 BC, iron tools were known from 700 BC; the proto-historic period is characterised by contact with Indian civilisations. According to linguistic and other historical evidence, Tai-speaking tribes migrated southwestward to the modern territories of Laos and Thailand from Guangxi sometime between the 8th–10th centuries. Laos traces its history to the kingdom of Lan Xang, founded in the 14th century by a Lao prince Fa Ngum, with 10,000 Khmer troops, took over Vientiane. Ngum was descended from a long line of Lao kings.
He made Theravada Buddhism Lan Xang prospered. Within 20 years of its formation, the kingdom expanded eastward to Champa and along the Annamite mountains in Vietnam, his ministers, unable to tolerate his ruthlessness, forced him into exile to the present-day Thai province of Nan in 1373, where he died. Fa Ngum's eldest son, Oun Heuan, ascended to the throne under the name Samsenthai and reigned for 43 years. Lan Xang became an important trade centre during Samsenthai's reign, but after his death in 1421 it collapsed into warring factions for 100 years. In 1520, Photisarath came to the throne and moved the capital from Luang Prabang to Vientiane to avoid a Burmese invasion. Setthathirat became king in 1548, after his father was killed, ordered the construction of what became the symbol of Laos, That Luang. Setthathirat disappeared in the mountains on his way back from a military expedition into Cambodia and Lan Xang began to decline, it was not until 1637, when Sou
The Philippines the Republic of the Philippines, is an archipelagic country in Southeast Asia. Situated in the western Pacific Ocean, it consists of about 7,641 islands that are categorized broadly under three main geographical divisions from north to south: Luzon and Mindanao; the capital city of the Philippines is Manila and the most populous city is Quezon City, both part of Metro Manila. Bounded by the South China Sea on the west, the Philippine Sea on the east and the Celebes Sea on the southwest, the Philippines shares maritime borders with Taiwan to the north, Vietnam to the west, Palau to the east, Malaysia and Indonesia to the south; the Philippines' location on the Pacific Ring of Fire and close to the equator makes the Philippines prone to earthquakes and typhoons, but endows it with abundant natural resources and some of the world's greatest biodiversity. The Philippines has an area of 300,000 km2, according to the Philippines Statistical Authority and the WorldBank and, as of 2015, had a population of at least 100 million.
As of January 2018, it is the eighth-most populated country in Asia and the 12th most populated country in the world. 10 million additional Filipinos lived overseas, comprising one of the world's largest diasporas. Multiple ethnicities and cultures are found throughout the islands. In prehistoric times, Negritos were some of the archipelago's earliest inhabitants, they were followed by successive waves of Austronesian peoples. Exchanges with Malay, Indian and Chinese nations occurred. Various competing maritime states were established under the rule of datus, rajahs and lakans; the arrival of Ferdinand Magellan, a Portuguese explorer leading a fleet for the Spanish, in Homonhon, Eastern Samar in 1521 marked the beginning of Hispanic colonization. In 1543, Spanish explorer Ruy López de Villalobos named the archipelago Las Islas Filipinas in honor of Philip II of Spain. With the arrival of Miguel López de Legazpi from Mexico City, in 1565, the first Hispanic settlement in the archipelago was established.
The Philippines became part of the Spanish Empire for more than 300 years. This resulted in Catholicism becoming the dominant religion. During this time, Manila became the western hub of the trans-Pacific trade connecting Asia with Acapulco in the Americas using Manila galleons; as the 19th century gave way to the 20th, the Philippine Revolution followed, which spawned the short-lived First Philippine Republic, followed by the bloody Philippine–American War. The war, as well as the ensuing cholera epidemic, resulted in the deaths of thousands of combatants as well as tens of thousands of civilians. Aside from the period of Japanese occupation, the United States retained sovereignty over the islands until after World War II, when the Philippines was recognized as an independent nation. Since the unitary sovereign state has had a tumultuous experience with democracy, which included the overthrow of a dictatorship by a non-violent revolution; the Philippines is a founding member of the United Nations, World Trade Organization, Association of Southeast Asian Nations, the Asia-Pacific Economic Cooperation forum, the East Asia Summit.
It hosts the headquarters of the Asian Development Bank. The Philippines is considered to be an emerging market and a newly industrialized country, which has an economy transitioning from being based on agriculture to one based more on services and manufacturing. Along with East Timor, the Philippines is one of Southeast Asia's predominantly Christian nations; the Philippines was named in honor of King Philip II of Spain. Spanish explorer Ruy López de Villalobos, during his expedition in 1542, named the islands of Leyte and Samar Felipinas after the then-Prince of Asturias; the name Las Islas Filipinas would be used to cover all the islands of the archipelago. Before that became commonplace, other names such as Islas del Poniente and Magellan's name for the islands San Lázaro were used by the Spanish to refer to the islands; the official name of the Philippines has changed several times in the course of its history. During the Philippine Revolution, the Malolos Congress proclaimed the establishment of the República Filipina or the Philippine Republic.
From the period of the Spanish–American War and the Philippine–American War until the Commonwealth period, American colonial authorities referred to the country as the Philippine Islands, a translation of the Spanish name. Since the end of World War II, the official name of the country has been the Republic of the Philippines. Philippines has gained currency as the common name since being the name used in Article VI of the 1898 Treaty of Paris, with or without the definite article. Discovery in 2018 of stone tools and fossils of butchered animal remains in Rizal, Kalinga has pushed back evidence of early hominins in the archipelago to as early as 709,000 years. However, the metatarsal of the Callao Man, reliably dated by uranium-series dating to 67,000 years ago remains the oldest human remnant found in the archipelago to date; this distinction belonged to the Tabon Man of Palawan, carbon-dated to around 26,500 years ago. Negritos were among the archipelago's earliest inhabitants, but their first settlement in the Philippines has not been reliably dated.
There are several opposing theories regarding the origins of ancient Filipinos. F. Landa Jocano theorizes. Wilhelm Solheim's Island Origin Theory postulates that the peopling of the archipelago transpired via trade networks originating in the Sundaland area around
The refresh rate is the number of times in a second that a display hardware updates its buffer. This is distinct from the measure of frame rate; the refresh rate includes the repeated drawing of identical frames, while frame rate measures how a video source can feed an entire frame of new data to a display. For example, most movie projectors advance from one frame to the next one 24 times each second, but each frame is illuminated two or three times before the next frame is projected using a shutter in front of its lamp. As a result, the movie projector has a 48 or 72 Hz refresh rate. On cathode ray tube displays, increasing the refresh rate decreases flickering, thereby reducing eye strain. However, if a refresh rate is specified, beyond what is recommended for the display, damage to the display can occur. For computer programs or telemetry, the term is applied to how a datum is updated with a new external value from another source. In a CRT, the scan rate is controlled by the vertical blanking signal generated by the video controller, ordering the monitor to position the beam at the upper left corner of the raster, ready to paint another frame.
It is limited by the monitor's maximum horizontal scan rate and the resolution since higher resolution means more scan lines. The refresh rate can be calculated from the horizontal scan rate by dividing the scanning frequency by the number of horizontal lines multiplied by 1.05. For instance, a monitor with a horizontal scanning frequency of 96 kHz at a resolution of 1280 × 1024 results in a refresh rate of 96,000 ÷ ≈ 89 Hz. CRT refresh rates have been an important factor in electronic game programming. Traditionally, one of the principles of video/computer game programming is to avoid altering the computer's video buffer except during the vertical retrace; this is necessary to prevent screen tearing. Some video game consoles such as the Famicom/Nintendo Entertainment System did not allow any graphics changes except during the retrace. Contrary to popular belief, liquid-crystal displays do suffer from flickering problems, it is still necessary to avoid modifying graphics data except during the retrace phase to prevent tearing from an image, rendered faster than the display operates.
Refresh rate or the temporal resolution of an LCD is the number of times per second in which the display draws the data it is being given. Since activated LCD pixels do not flash on/off between frames, LCD monitors exhibit no refresh-induced flicker, no matter how low the refresh rate. However, high refresh rates may result in visual artifacts that distort the image in unpleasant ways. High-end LCD televisions now feature up to 60000 Hz refresh rate, which requires advanced digital processing to insert additional interpolated frames between the real images to smooth the image motion; such high refresh rates may not be supported by pixel response times. For a refresh rate of 60 Hz to be displayed an LCD would require a response time of 1.667 milliseconds GtG. On smaller CRT monitors, few people notice any discomfort between 60–72 Hz. On larger CRT monitors, most people experience mild discomfort unless the refresh is set to 72 Hz or higher. A rate of 100 Hz is comfortable at any size. However, this does not apply to LCD monitors.
The closest equivalent to a refresh rate on an LCD monitor is its frame rate, locked at 60 fps. But this is a problem, because the only part of an LCD monitor that could produce CRT-like flicker—its backlight — operates at around a minimum of 200 Hz. Different operating systems set the default refresh rate differently. Microsoft Windows 95 and Windows 98 set the refresh rate to the highest rate that they believe the display supports. Windows NT-based operating systems, such as Windows 2000 and its descendants Windows XP, Windows Vista and Windows 7, set the default refresh rate to a conservative rate 60 Hz; the many variations of Linux set a refresh rate chosen by the user during setup of the display manager. Some fullscreen applications, including many games, now allow the user to reconfigure the refresh rate before entering fullscreen mode, but most default to a conservative resolution and refresh rate and let you increase the settings in the options. Old monitors could be damaged if a user set the video card to a refresh rate higher than the highest rate supported by the monitor.
Some models of monitors display a notice. Some LCDs support adapting their refresh rate to the current frame rate delivered by the graphics card. Two technologies that allow this are G-Sync; when LCD shutter glasses are used for stereo 3D displays, the effective refresh rate is halved, because each eye needs a separate picture. For this reason, it is recommended to use a display capable of at least 120 Hz, because divided in half this rate is again 60 Hz. Higher refresh rates result in greater image stability, for example 72 Hz non-stereo is 144 Hz stereo, 90 Hz
Japan is an island country in East Asia. Located in the Pacific Ocean, it lies off the eastern coast of the Asian continent and stretches from the Sea of Okhotsk in the north to the East China Sea and the Philippine Sea in the south; the kanji that make up Japan's name mean "sun origin", it is called the "Land of the Rising Sun". Japan is a stratovolcanic archipelago consisting of about 6,852 islands; the four largest are Honshu, Hokkaido and Shikoku, which make up about ninety-seven percent of Japan's land area and are referred to as home islands. The country is divided into 47 prefectures in eight regions, with Hokkaido being the northernmost prefecture and Okinawa being the southernmost one; the population of 127 million is the world's tenth largest. 90.7 % of people live in cities. About 13.8 million people live in the capital of Japan. The Greater Tokyo Area is the most populous metropolitan area in the world with over 38 million people. Archaeological research indicates; the first written mention of Japan is in Chinese history texts from the 1st century AD.
Influence from other regions China, followed by periods of isolation from Western Europe, has characterized Japan's history. From the 12th century until 1868, Japan was ruled by successive feudal military shōguns who ruled in the name of the Emperor. Japan entered into a long period of isolation in the early 17th century, ended in 1853 when a United States fleet pressured Japan to open to the West. After nearly two decades of internal conflict and insurrection, the Imperial Court regained its political power in 1868 through the help of several clans from Chōshū and Satsuma – and the Empire of Japan was established. In the late 19th and early 20th centuries, victories in the First Sino-Japanese War, the Russo-Japanese War and World War I allowed Japan to expand its empire during a period of increasing militarism; the Second Sino-Japanese War of 1937 expanded into part of World War II in 1941, which came to an end in 1945 following the Japanese surrender. Since adopting its revised constitution on May 3, 1947, during the occupation led by SCAP, the sovereign state of Japan has maintained a unitary parliamentary constitutional monarchy with an Emperor and an elected legislature called the National Diet.
Japan is a member of the ASEAN Plus mechanism, UN, the OECD, the G7, the G8, the G20, is considered a great power. Its economy is the world's third-largest by nominal GDP and the fourth-largest by purchasing power parity, it is the world's fourth-largest exporter and fourth-largest importer. Japan benefits from a skilled and educated workforce. Although it has renounced its right to declare war, Japan maintains a modern military with the world's eighth-largest military budget, used for self-defense and peacekeeping roles. Japan is a developed country with a high standard of living and Human Development Index, its population enjoys the highest life expectancy and third lowest infant mortality rate in the world, but is experiencing issues due to an aging population and low birthrate. Japan is renowned for its historical and extensive cinema, influential music industry, video gaming, rich cuisine and its major contributions to science and modern technology; the Japanese word for Japan is 日本, pronounced Nihon or Nippon and means "the origin of the sun".
The character nichi means "sun" or "day". The compound therefore means "origin of the sun" and is the source of the popular Western epithet "Land of the Rising Sun"; the earliest record of the name Nihon appears in the Chinese historical records of the Tang dynasty, the Old Book of Tang. At the end of the seventh century, a delegation from Japan requested that Nihon be used as the name of their country; this name may have its origin in a letter sent in 607 and recorded in the official history of the Sui dynasty. Prince Shōtoku, the Regent of Japan, sent a mission to China with a letter in which he called himself "the Emperor of the Land where the Sun rises"; the message said: "Here, I, the emperor of the country where the sun rises, send a letter to the emperor of the country where the sun sets. How are you". Prior to the adoption of Nihon, other terms such as Yamato and Wakoku were used; the term Wa is a homophone of Wo 倭, used by the Chinese as a designation for the Japanese as early as the third century Three Kingdoms period.
Another form of Wa, Wei in Chinese) was used for an early state in Japan called Nakoku during the Han dynasty. However, the Japanese disliked some connotation of Wa 倭, it was therefore replaced with the substitute character Wa, meaning "togetherness, harmony"; the English word Japan derives from the historical Chinese pronunciation of 日本. The Old Mandarin or early Wu Chinese pronunciation of Japan was recorded by Marco Polo as Cipangu. In modern Shanghainese, a Wu dialect, the pronunciation of characters 日本; the old Malay word for Japan, Japun or Japang, was borrowed from a southern coastal Chinese dialect Fukienese or Ningpo – and this Malay word was encountered by Portuguese traders in Southeast Asia in the 16th century. These Early Portuguese traders brought the word
Video CD is a home video format and the first format for distributing films on standard 120 mm optical discs. The format was adopted in Southeast Asia and superseded the VHS and Betamax systems in the region until DVD became affordable in the region in the late 2000s; the format is a standard digital format for storing video on a compact disc. VCDs are playable in dedicated VCD players and playable in most DVD players, personal computers and some video game consoles. However, they are less playable in some Blu-ray Disc players and video game consoles such as the Sony PlayStation 3/4 due to lack of support for backward compatibility of the older MPEG-1 format; the Video CD standard was created in 1993 by Sony, Matsushita, JVC and is referred to as the White Book standard. Although they have been superseded by other media, VCDs continue to be retailed as a low-cost video format. LaserDisc was first available on the market, in Atlanta, Georgia, on December 15, 1978; this 30 cm disc could hold an hour of analog video on each side.
The Laserdisc provided picture quality nearly double that of VHS tape and analog audio quality far superior to VHS. Philips teamed up with Sony to develop a new type of disc, the compact disc or CD. Introduced in 1982 in Japan, the CD is about 120 mm in diameter, is single-sided; the format was designed to store digitized sound and proved to be a success in the music industry. A few years Philips decided to give CDs the ability to produce video, utilizing the same technology as its LaserDisc counterpart; this led to the creation of CD Video in 1987. However, the disc's small size impeded the ability to store analog video. Therefore, CD-V distribution was limited to featuring music videos, it was soon discontinued by 1991. By the early 1990s engineers were able to digitize and compress video signals improving storage efficiency; because this new format could hold 74/80 minutes of audio and video on a 650/700MB disc, releasing movies on compact discs became a reality. Extra capacity was obtained by sacrificing the error correction.
This format was named Video CD or VCD. VCD enjoyed a brief period of success, with a few major feature films being released in the format; however the introduction of the CD-R disc and associated recorders stopped the release of feature films in their tracks because the VCD format had no means of preventing unauthorized copies from being made. However, VCDs are still being released in several countries in Asia, but now with copy-protection; the development of more sophisticated, higher capacity optical disc formats yielded the DVD format, released only a few years with a copy protection mechanism. DVD players use lasers that are of shorter wavelength than those used on CDs, allowing the recorded pits to be smaller, so that more information can be stored; the DVD was so successful that it pushed VHS out of the video market once suitable recorders became available. VCDs made considerable inroads into developing nations, where they are still in use today due to their cheaper manufacturing and retail costs.
Video CDs comply with the CD-i Bridge format, are authored using tracks in CD-ROM XA mode. The first track of a VCD is in CD-ROM XA Mode 2 Form 1, stores metadata and menu information inside an ISO 9660 filesystem; this track may contain other non-essential files, is shown by operating systems when loading the disc. This track can be absent from a VCD, which would still work but would not allow it to be properly displayed in computers; the rest of the tracks are in CD-ROM XA Mode 2 Form 2 and contain video and audio multiplexed in an MPEG program stream container, but CD audio tracks are allowed. Using Mode 2 Form 2 allows 800 megabytes of VCD data to be stored on one 80 minute CD; this is achieved by sacrificing the error correction redundancy present in Mode 1. It was considered that small errors in the video and audio stream pass unnoticed. This, combined with the net bitrate of VCD video and audio, means that exactly 80 minutes of VCD content can be stored on an 80-minute CD, 74 minutes of VCD content on a 74-minute CD, so on.
This was done in part to ensure compatibility with existing CD drive technology the earliest "1x" speed CD drives. Video specifications Codec: MPEG-1 Resolution: NTSC: 352×240 PAL/SECAM: 352×288 Aspect Ratio: NTSC: 4:3 PAL/SECAM: 4:3 Framerate: NTSC: 29.97 or 23.976 frames per second PAL/SECAM: 25 frames per second Bitrate: 1,150 kilobits per second Rate Control: constant bitrateAlthough many DVD video players support playback of VCDs, VCD video is only compatible with the DVD-Video standard if encoded at 29.97 frames per second or 25 frames per second. The 352×240 and 352×288 resolutions were chosen because it is half the horizontal and vertical resolution of NTSC video, half the horizontal resolution of PAL; this is half the resolution of an analog VHS tape, ~330 horizontal and 480 vertical or 330×576. Audio specifications Codec: MPEG-1 Audio Layer II Sample Frequency: 44,100 hertz Output: Dual channel, stereo, or Dolby Surround Bitrate: 224 kilobits per second Rate Control: Constant