1080i is an abbreviation referring to a combination of frame resolution and scan type, used in high-definition television and high-definition video. The number "1080" refers to the number of horizontal lines on the screen; the "i" is an abbreviation for "interlaced". A related display resolution is 1080p, which has 1080 lines of resolution; the term assumes a widescreen aspect ratio of 16:9, so the 1080 lines of vertical resolution implies 1920 columns of horizontal resolution, or 1920 pixels × 1080 lines. A 1920 pixels × 1080 lines screen has a total of 2.1 megapixels and a temporal resolution of 50 or 60 interlaced fields per second. This format is used in the SMPTE 292M standard; the choice of 1080 lines originates with Charles Poynton, who in the early 1990s pushed for "square pixels" to be used in HD video formats. Within the designation "1080i", the i stands for interlaced scan. A frame of 1080i video consists of two sequential fields of 540 vertical pixels; the first field consists of all odd-numbered TV lines and the second all numbered lines.
The horizontal lines of pixels in each field are captured and displayed with a one-line vertical gap between them, so the lines of the next field can be interlaced between them, resulting in 1080 total lines. 1080i differs from 1080p, where the p stands for progressive scan, where all lines in a frame are captured at the same time. In native or pure 1080i, the two fields of a frame correspond to different instants, so motion portrayal is good; this is true for interlaced video in general and can be observed in still images taken of fast motion scenes. However, when 1080p material is captured at 25 or 30 frames/second, it is converted to 1080i at 50 or 60 fields/second for processing or broadcasting. In this situation both fields in a frame do correspond to the same instant; the field-to-instant relation is somewhat more complex for the case of 1080p at 24 frames/second converted to 1080i at 60 fields/second. The field rate of 1080i is 60 Hz for countries that use or used System M as analog television system with 60 fields/sec, or 50 Hz for regions that use or used 625-lines television system with 50 fields/sec.
Both field rates can be carried by major digital television broadcast formats such as ATSC, DVB, ISDB-T International. The frame rate can be implied by the context, while the field rate is specified after the letter i, such as "1080i60". In this case 1080i60 refers to 60 fields per second; the European Broadcasting Union prefers to use the resolution and frame rate separated by a slash, as in 1080i/30 and 1080i/25 480i/30 and 576i/25. Resolutions of 1080i60 or 1080i50 refers to 1080i/30 or 1080i/25 in EBU notation. 1080i is directly compatible with some CRT HDTVs on which it can be displayed natively in interlaced form, but for display on progressive-scan—e.g. Most new LCD and plasma TVs, it must be deinterlaced. Depending on the television's video processing capabilities, the resulting video quality may vary, but may not suffer. For example, film material at 25fps may be deinterlaced from 1080i50 to restore a full 1080p resolution at the original frame rate without any loss. Preferably video material with 50 or 60 motion phases/second is to be converted to 50p or 60p before display.
Worldwide, most HD channels on satellite and cable broadcast in 1080i. In the United States, 1080i is the preferred format for most broadcasters, with Inc.. Viacom, AT&T, Comcast owned networks broadcasting in the format. Only Fox-owned television networks and Disney-owned television networks, along with MLB Network and a few other cable networks use 720p as the preferred format for their networks. Many ABC affiliates owned by Hearst Television and former Belo Corporation stations owned by TEGNA, along with some individual affiliates of those three networks, air their signals in 1080i and upscale network programming for master control and transmission purposes, as most syndicated programming and advertising is produced and distributed in 1080i, removing a downscaling step to 720p; this allows local newscasts on these ABC affiliates to be produced in the higher resolution to match the picture quality of their 1080i competitors. Some cameras and broadcast systems that use 1080 vertical lines per frame do not use the full 1920 pixels of a nominal 1080i picture for image capture and encoding.
Common subsampling ratios include 3/4 and 1/2. Where used, the lower horizontal resolution is scaled to capture and/or display a full-sized picture. Using half horizontal resolution and only one field of each frame results in the format known as qHD, which has fram
Mumbai is the capital city of the Indian state of Maharashtra. As of 2011 it is the most populous city in India with an estimated city proper population of 12.4 million. The larger Mumbai Metropolitan Region is the second most populous metropolitan area in India, with a population of 21.3 million as of 2016. Mumbai has a deep natural harbour. In 2008, Mumbai was named an alpha world city, it is the wealthiest city in India, has the highest number of millionaires and billionaires among all cities in India. Mumbai is home to three UNESCO World Heritage Sites: the Elephanta Caves, Chhatrapati Shivaji Maharaj Terminus, the city's distinctive ensemble of Victorian and Art Deco buildings; the seven islands that constitute Mumbai were home to communities of Koli people, who originated in Gujarat in prehistoric times. For centuries, the islands were under the control of successive indigenous empires before being ceded to the Portuguese Empire and subsequently to the East India Company when in 1661 Charles II of England married Catherine of Braganza and as part of her dowry Charles received the ports of Tangier and Seven Islands of Bombay.
During the mid-18th century, Bombay was reshaped by the Hornby Vellard project, which undertook reclamation of the area between the seven islands from the sea. Along with construction of major roads and railways, the reclamation project, completed in 1845, transformed Bombay into a major seaport on the Arabian Sea. Bombay in the 19th century was characterised by educational development. During the early 20th century it became a strong base for the Indian independence movement. Upon India's independence in 1947 the city was incorporated into Bombay State. In 1960, following the Samyukta Maharashtra Movement, a new state of Maharashtra was created with Bombay as the capital. Mumbai is the financial and entertainment capital of India, it is one of the world's top ten centres of commerce in terms of global financial flow, generating 6.16% of India's GDP and accounting for 25% of industrial output, 70% of maritime trade in India, 70% of capital transactions to India's economy. The city houses important financial institutions such as the Reserve Bank of India, the Bombay Stock Exchange, the National Stock Exchange of India, the SEBI and the corporate headquarters of numerous Indian companies and multinational corporations.
It is home to some of India's premier scientific and nuclear institutes like Bhabha Atomic Research Centre, Nuclear Power Corporation of India, Indian Rare Earths, Tata Institute of Fundamental Research, Atomic Energy Regulatory Board, Atomic Energy Commission of India, the Department of Atomic Energy. The city houses India's Hindi and Marathi cinema industries. Mumbai's business opportunities, as well as its potential to offer a higher standard of living, attract migrants from all over India, making the city a melting pot of many communities and cultures; the name Mumbai is derived from Mumbā or Mahā-Ambā—the name of the patron goddess Mumbadevi of the native Koli community— and ā'ī meaning "mother" in the Marathi language, the mother tongue of the Koli people and the official language of Maharashtra. The Koli people originated in Kathiawad and Central Gujarat, according to some sources they brought their goddess Mumba with them from Kathiawad, where she is still worshipped. However, other sources disagree.
The oldest known names for the city are Galajunkja. In 1508, Portuguese writer Gaspar Correia used the name "Bombaim" in his Lendas da Índia; this name originated as the Galician-Portuguese phrase bom baim, meaning "good little bay", Bombaim is still used in Portuguese. In 1516, Portuguese explorer Duarte Barbosa used the name Tana-Maiambu: Tana appears to refer to the adjoining town of Thane and Maiambu to Mumbadevi. Other variations recorded in the 16th and the 17th centuries include: Mombayn, Bombain, Monbaym, Mombaym, Bombaiim, Boon Bay, Bon Bahia. After the English gained possession of the city in the 17th century, the Portuguese name was anglicised as Bombay. Ali Muhammad Khan, imperial dewan or revenue minister of the Gujarat province, in the Mirat-i Ahmedi referred to the city as Manbai; the French traveller Louis Rousselet who visited in 1863 and 1868 tells us in his book L’Inde des Rajahs: "Etymologists have wrongly derived this name from the Portuguese Bôa Bahia, or, not knowing that the tutelar goddess of this island has been, from remote antiquity, Bomba, or Mamba Dévi, that she still... possesses a temple".
By the late 20th century, the city was referred to as Mumbai or Mambai in Marathi, Gujarati and Sindhi, as Bambai in Hindi. The Government of India changed the English name to Mumbai in November 1995; this came at the insistence of the Marathi nationalist Shiv Sena party, which had just won the Maharashtra state elections, mirrored similar name changes across the country and in Maharashtra. According to Slate magazine, "they argued that'Bombay' was a corrupted English version of'Mumbai' and an unwanted legacy of British colonial rule." Slate said "The push to rename Bombay was part of a larger movement to strengthen Marathi identity in the Maharashtra region." While the city is still referred to as Bombay by some of its residents and by Indians from other regions, mention of the ci
Internet Protocol television is the delivery of television content over Internet Protocol networks. This is in contrast to delivery through traditional terrestrial and cable television formats. Unlike downloaded media, IPTV offers the ability to stream the source media continuously; as a result, a client media player can begin playing the content immediately. This is known as streaming media. Although IPTV uses the Internet protocol it is not limited to television streamed from the Internet. IPTV is deployed in subscriber-based telecommunications networks with high-speed access channels into end-user premises via set-top boxes or other customer-premises equipment. IPTV is used for media delivery around corporate and private networks. IPTV in the telecommunications arena is notable for its ongoing standardisation process. IPTV services may be classified into three main groups: Live television and live media, with or without related interactivity. Many different definitions of IPTV have appeared, including elementary streams over IP networks, MPEG transport streams over IP networks and a number of proprietary systems.
One official definition approved by the International Telecommunication Union focus group on IPTV is: IPTV is defined as multimedia services such as television/video/audio/text/graphics/data delivered over IP based networks managed to provide the required level of quality of service and experience, security and reliability. Another definition of IPTV, relating to the telecommunications industry, is the one given by Alliance for Telecommunications Industry Solutions IPTV Exploratory Group in 2005: IPTV is defined as the secure and reliable delivery to subscribers of entertainment video and related services; these services may include, for example, Live TV, Video On Demand and Interactive TV. These services are delivered across an access agnostic, packet switched network that employs the IP protocol to transport the audio and control signals. In contrast to video over the public Internet, with IPTV deployments, network security and performance are managed to ensure a superior entertainment experience, resulting in a compelling business environment for content providers and customers alike.
The term IPTV first appeared in 1995 with the founding of Precept Software by Judith Estrin and Bill Carrico. Precept developed an Internet video product named IP/TV. IP/TV was an Mbone compatible Windows and Unix-based application that transmitted single and multi-source audio and video traffic, ranging from low to DVD quality, using both unicast and IP multicast Real-time Transport Protocol and Real time control protocol; the software was written by Steve Casner, Karl Auerbach, Cha Chee Kuan. Precept was acquired by Cisco Systems in 1998. Cisco retains the IP/TV trademark. Internet radio company AudioNet started the first continuous live webcasts with content from WFAA-TV in January 1998 and KCTU-LP on 10 January 1998. Kingston Communications, a regional telecommunications operator in the UK, launched Kingston Interactive Television, an IPTV over digital subscriber line service in September 1999; the operator added additional VoD service in October 2001 with a VoD content provider. Kingston was one of the first companies in the world to introduce IPTV and IP VoD over ADSL as a commercial service.
The service became the reference for various changes to UK Government regulations and policy on IPTV. In 2006, the KIT service was discontinued, subscribers having declined from a peak of 10,000 to 4,000. In 1999, NBTel was the first to commercially deploy Internet protocol television over DSL in Canada using the Alcatel 7350 DSLAM and middleware created by iMagic TV; the service was marketed under the brand VibeVision in New Brunswick, expanded into Nova Scotia in early 2000 after the formation of Aliant. IMagic TV was sold to Alcatel. In 2002, Sasktel was the second in Canada to commercially deploy IPTV over DSL, using the Lucent Stinger DSL platform. In 2005, SureWest Communications was the first North American company to offer high-definition television channels over an IPTV service. In 2005, Bredbandsbolaget launched its IPTV service as the first service provider in Sweden; as of January 2009, they are not the biggest supplier any longer. In 2007, TPG became the first internet service provider in Australia to launch IPTV.
By 2010, iiNet and Telstra launched IPTV services in conjunction to internet plans. In 2008, Pakistan Telecommunication Company Limited launched IPTV under the brand name of PTCL Smart TV in Pakistan; this service is available in 150 major cities of the country offering 140 live channels. In 2010, CenturyLink – after acquiring Embarq and Qwest – entered five U. S. markets with an IPTV service called Prism. This was after successful test marketing in Florida. In 2016, Korean Central Television introduced the set-top box called Manbang providing video-on-demand services in North Korea via quasi-internet protocol television. Manbang allows viewers to watch five different TV channels in real-time, read find political information regarding the Supreme Leader and Juche ideology, read articles from state-run news organizations; the technology was hindered by low broadb
Dish Network Corporation is a U. S. television provider. Based in Meridian, Colorado, it is the owner of the direct-broadcast satellite provider Dish, the over-the-top IPTV service Sling TV; as of November 2016, the company provided services to 13.7 million television and 580,000 broadband subscribers. The company has 17,000 employees. In January 2008, Dish Network was spun off from its former parent company EchoStar, founded by Charlie Ergen as a satellite television equipment distributor in 1980; the company began using Dish Network as its consumer brand in March 1997 after the successful launch of its first satellite, EchoStar I, in December 1995. That launch marked the beginning of its subscription television services, EchoStar has since launched numerous satellites, with nine owned and leased satellites in its fleet as of January 2013. EchoStar continues to be the primary technology partner to Dish Network. Joseph Clayton became president and chief executive officer of the company in June 2011, while Charlie Ergen remained chairman.
Clayton remained in the position until March 31, 2015 when he retired leaving Ergen to resume the post. Ergen has said diversifying and updating technology for the company will be a high priority, with an expectation that, over the coming decade, the company will provide internet and telephone service for both home and mobile applications. In December 2017, Dish Network announced that Ergen will be replaced by Erik Carlson. Dish Network began operations on March 4, 1996, as a service of EchoStar. EchoStar, a precursor to Dish Network, was formed in 1980 by its chairman and chief executive officer, Charlie Ergen along with colleagues Candy Ergen and Jim Defranco, as a distributor of C-band satellite television systems. In 1987, EchoStar applied for a direct-broadcast satellite broadcast license with the Federal Communications Commission and was granted access to orbital slot 119° west longitude in 1992. In 1998 EchoStar purchased the broadcasting assets of a satellite broadcasting joint venture of News Corporation and MCI Worldcom, called ASkyB.
With this purchase EchoStar obtained 28 of the 32 transponder licenses in the 110° West orbital slot, more than doubling existing continental United States broadcasting capacity at a value of $682.5 million. The acquisition inspired the company to introduce a multi satellite system called Dish 500, theoretically capable of receiving more than 500 channels on one Dish. In the same year, EchoStar, partnering with Bell Canada, launched Dish Network Canada. On December 7, 2007, EchoStar announced that it would spin off its technology and infrastructure assets into a separate company under the EchoStar name, after which the remainder of the company would be renamed Dish Network Corporation; the spun-out EchoStar began trading on January 3, 2008. In 2011, Dish Network spent over $3 billion in acquisitions of companies in bankruptcy, which The Motley Fool's Anders Bylund described as "a veritable buying rampage in the bargain bin." This includes the April 6, 2011, purchase of Blockbuster Inc. in a bankruptcy auction in New York, agreeing to pay $322 million in cash and assume $87 million in liabilities and other obligations for the nationwide video-rental company.
Dish Network acquired the defunct companies DBSD and Terrestar. Dish Network made a bid to purchase Hulu on October 2011, but Hulu's owners chose not to sell the company. There was speculation that Dish Network might purchase Sprint Nextel or Clearwire. In 2013, Dish made a bid for both companies. CEO Charles Ergen plans on adding wireless internet and mobile video services that can compete with Netflix and cable companies. About the new markets, Ergen said, "Given the assets we've been accumulating, I don't think it's hard to see we're moving in a different direction from pay-TV, a market that's becoming saturated."Dish Network put its Blockbuster acquisition to work by making available Dish Movie Pack for Dish Network subscribers and Sling TV for non-Dish Network subscribers. Blockbuster has agreements that allow it to receive movies 28 days before Netflix and Redbox which could encourage customers to use these services. Dish Network plans on offering high-speed internet; the company plans a hybrid satellite/terrestrial mobile broadband service.
In 2011, it petitioned the FCC to combine the S-Band spectrum it acquired from DBSD and Terrestar, combine this spectrum with LTE. Unlike LightSquared, Dish's spectrum has minimal risk of disrupting Global Positioning Systems. At the 2012 Consumer Electronics Show, Dish Network announced a corporate rebranding, under which the company would publicly refer to itself as just "Dish" rather than "Dish Network". After changing the position of a satellite orbital position from being over Mexico to Brazil in 2011, Dish Network sought companies that could make a deal, among them Telefónica. However, nothing came of this, Dish decided to enter the country itself. According to the Brazilian Agency of Telecommunications, they await the authorization of the application. Dish's main service is satellite television, its offerings are similar to other cable companies. Viewers can choose from a series of service bundles. A la carte programming is available, however limited other than p
Streaming media is multimedia, received by and presented to an end-user while being delivered by a provider. The verb "to stream" refers to the process of obtaining media in this manner. A client end-user can use their media player to start playing digital video or digital audio content before the entire file has been transmitted. Distinguishing delivery method from the media distributed applies to telecommunications networks, as most of the delivery systems are either inherently streaming or inherently non-streaming. For example, in the 1930s, elevator music was among the earliest popular music available as streaming media; the term "streaming media" can apply to media other than video and audio, such as live closed captioning, ticker tape, real-time text, which are all considered "streaming text". Live streaming is the delivery of Internet content in real-time much as live television broadcasts content over the airwaves via a television signal. Live internet streaming requires a form of source media, an encoder to digitize the content, a media publisher, a content delivery network to distribute and deliver the content.
Live streaming does not need to be recorded at the origination point, although it is. There are challenges with streaming content on the Internet. If the user does not have enough bandwidth in their Internet connection, they may experience stops, lags, or slow buffering of the content; some users may not be able to stream certain content due to not having compatible computer or software systems. Some popular streaming services include the video sharing website YouTube and Mixer, which live stream the playing of video games. Netflix and Amazon Video stream movies and TV shows, Spotify, Apple Music and TIDAL stream music. In the early 1920s, George O. Squier was granted patents for a system for the transmission and distribution of signals over electrical lines, the technical basis for what became Muzak, a technology streaming continuous music to commercial customers without the use of radio. Attempts to display media on computers date back to the earliest days of computing in the mid-20th century.
However, little progress was made for several decades due to the high cost and limited capabilities of computer hardware. From the late 1980s through the 1990s, consumer-grade personal computers became powerful enough to display various media; the primary technical issues related to streaming were having enough CPU power bus bandwidth to support the required data rates, creating low-latency interrupt paths in the operating system to prevent buffer underrun, enabling skip-free streaming of the content. However, computer networks were still limited in the mid-1990s, audio and video media were delivered over non-streaming channels, such as by downloading a digital file from a remote server and saving it to a local drive on the end user's computer or storing it as a digital file and playing it back from CD-ROMs. In 1991 the first commercial Ethernet Switch was introduced, which enabled more powerful computer networks leading to the first streaming video solutions used by schools and corporations such as expanding Bloomberg Television worldwide.
In the mid 1990s the World Wide Web was established, but streaming audio would not be practical until years later. During the late 1990s and early 2000s, users had increased access to computer networks the Internet. During the early 2000s, users had access to increased network bandwidth in the "last mile"; these technological improvements facilitated the streaming of audio and video content to computer users in their homes and workplaces. There was an increasing use of standard protocols and formats, such as TCP/IP, HTTP, HTML as the Internet became commercialized, which led to an infusion of investment into the sector; the band Severe Tire Damage was the first group to perform live on the Internet. On June 24, 1993, the band was playing a gig at Xerox PARC while elsewhere in the building, scientists were discussing new technology for broadcasting on the Internet using multicasting; as proof of PARC's technology, the band's performance was broadcast and could be seen live in Australia and elsewhere.
In a March 2017 interview, band member Russ Haines stated that the band had used "half of the total bandwidth of the internet" to stream the performance, a 152-by-76 pixel video, updated eight to twelve times per second, with audio quality, "at best, a bad telephone connection". Microsoft Research developed a Microsoft TV application, compiled under MS Windows Studio Suite and tested in conjunction with Connectix QuickCam. RealNetworks was a pioneer in the streaming media markets, when it broadcast a baseball game between the New York Yankees and the Seattle Mariners over the Internet in 1995; the first symphonic concert on the Internet took place at the Paramount Theater in Seattle, Washington on November 10, 1995. The concert was a collaboration between The Seattle Symphony and various guest musicians such as Slash, Matt Cameron, Barrett Martin; when Word Magazine launched in 1995, they featured the first-ever streaming soundtracks on the Internet. Metro
Sony Marathi is an Indian pay television channel that broadcasts programming in Marathi. It was owned and operated by Sony Pictures Networks India. Julta Julta Jultay Ki Ek Hoti Rajkanya Sare Tuzyachsathi Ti Phulrani Hum Bane Tum Bane Bheti Lagi Jeeva Year Down Duniyadari Filmy Ishtyle Maharashtrachi Hasya Jatra Garja Maharashtra Kon honar crorepati www.sonymarathi.com
Macau or Macao the Macao Special Administrative Region of the People's Republic of China, is a special administrative region on the western side of the Pearl River estuary in southern China. With a population of 653,100 in an area of 32.9 km2, it is the most densely populated region in the world. Macau was a colony of the Portuguese Empire, after Ming China leased the territory as a trading post in 1557. Governing under Chinese authority and sovereignty, Portugal was given perpetual occupation rights for Macau in 1887; the colony remained under Portuguese control until 1999. As a special administrative region, Macau's system of government is separate from that of mainland China. A sparsely populated collection of coastal islands, the territory has become a major resort city and the top destination for gambling tourism, it is the ninth-highest recipient of tourism revenue and its gaming industry is seven times larger than that of Las Vegas. Although the city has one of the highest per capita incomes in the world, it has severe income inequality.
Macau has a high Human Development Index and the fourth-highest life expectancy in the world. The territory is urbanised and most development is built on reclaimed land; the first known written record of the name "Macau", rendered as "Ya/A Ma Gang", is in a letter dated 20 November 1555. The local inhabitants believed that the sea goddess Mazu had blessed and protected the harbour and called the waters around A-Ma Temple using her name; when Portuguese explorers first arrived in the area and asked for the place name, the locals thought they were asking about the temple and told them it was "Ma Kok". The earliest Portuguese spelling for this was Amaquão. Multiple variations were used until Amacão / Amacao and Macão / Macao became common during the 17th century standardising as Macao, Macau today. Macau Peninsula had many names in Chinese, including Jingao and Haojingao; the islands Taipa and Hengqin were collectively called Shizimen. These names would become Aomen, Oumún in Cantonese and translating as "bay gate" or "port gate", to refer to the whole territory.
The region is first known to have been settled during the Han dynasty. However, Macau did not develop as a major settlement until the Portuguese arrived in the 16th century; the first European visitor to reach China by sea was the explorer Jorge Álvares, who arrived in 1513. Merchants first established a trading post in Hong Kong waters at Tamão, beginning regular trade with nearby settlements in southern China. Military clashes between the Ming and Portuguese navies followed the expulsion of the Tamão traders in 1521. Despite the trade ban, Portuguese merchants continued to attempt settling on other parts of the Pearl River estuary settling on Macau. Luso-Chinese trade relations were formally reestablished in 1554 and Portugal soon after acquired a permanent lease for Macau in 1557; the small population of Portuguese merchants became a growing city. The Roman Catholic Diocese of Macau was created in 1576, by 1583, the Senate had been established to handle municipal affairs for the growing settlement.
Macau was at the peak of its prosperity as a major entrepôt during the late 16th century, providing a crucial connection in exporting Chinese silk to Japan during the Nanban trade period. Although the Portuguese were prohibited from fortifying Macau or stockpiling weapons, the Fortaleza do Monte was constructed in response to frequent Dutch naval incursions; the Dutch attempted to take the city in the 1622 Battle of Macau, but were repelled by the Portuguese. Macau entered a period of decline in the 1640s following a series of catastrophic events for the burgeoning colony: Portuguese access to trade routes was irreparably severed when Japan halted trade in 1639, Portugal revolted against Spain in 1640, Malacca fell to the Dutch in 1641. Maritime trade with China was banned in 1644 following the Qing conquest under the Haijin policies and limited only to Macau on a lesser scale while the new dynasty focused on eliminating surviving Ming loyalists. While the Kangxi Emperor lifted the prohibition in 1684, China again restricted trade under the Canton System in 1757.
Foreign ships were required to first stop at Macau before further proceeding to Canton. Qing authorities exercised a much greater role in governing the territory during this period; as the opium trade became more lucrative during the eighteenth century, Macau again became an important stopping point en route to China. Following the First Opium War and establishment of Hong Kong, Macau lost its role as a major port. Firecracker and incense production, as well as tea and tobacco processing, were vital industries in the colony during this time. Portugal was able to assert its sovereignty. Portugal occupied nearby Lapa and Montanha, but these would be returned to China by 1887, when perpetual occupation rights over Macau were formalised in the Sino-Portuguese Treaty of Peking; this agreement obligated Portugal from ceding Macau without Chinese approval. Despite occasional conflict between Cantonese authorities and the colonial government, Macau's status remained unchanged through the republican revolutions of b