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The digital television transition, also called the digital switchover (DSO), the analogue switch/sign-off (ASO), the digital migration, or the analogue shutdown, is the process in which older analogue television broadcasting technology is converted to and replaced by digital television. Conducted by individual nations on different schedules, this primarily involves the conversion of analogue terrestrial television broadcasting infrastructure to Digital terrestrial television (DTT), a major benefit being extra frequencies on the radio spectrum and lower broadcasting costs, as well as improved viewing qualities for consumers.
The transition may also involve analogue cable conversion to digital cable or Internet Protocol television, as well as analog to digital satellite television. Transition of land based broadcasting had begun in some countries around 2000. By contrast, transition of satellite television systems was well underway or completed in many countries by this time. It is an involved process because the existing analogue television receivers owned by viewers cannot receive digital broadcasts; viewers must either purchase new digital TVs, or digital converter boxes which have a digital tuner and change the digital signal to an analog signal or some other form of a digital signal (i.e. HDMI) which can be received on the older TV. Usually during a transition, a simulcast service is operated where a broadcast is made available to viewers in both analogue and digital at the same time. As digital becomes more popular, it is expected that the existing analogue services will be removed. In most places this has already happened, where a broadcaster has offered incentives to viewers to encourage them to switch to digital. Government intervention usually involves providing some funding for broadcasters and, in some cases, monetary relief to viewers, to enable a switchover to happen by a given deadline. In addition, governments can also have a say with the broadcasters as to what digital standard to adopt – either DVB-T, ATSC, ISDB-T, or DTMB. Governments can also require all receiving equipment sold in a country to support the necessary digital 'tuner'.
Before digital television, PAL and NTSC were used for both video processing within TV stations and for broadcasting to viewers. Because of this, the switchover process may also include the adoption of digital equipment using serial digital interface (SDI) on TV stations, replacing analogue PAL or NTSC component or composite video equipment. Digital broadcasting standards are only used to broadcast video to viewers; Digital TV stations usually use SDI irrespective of broadcast standard, although it might be possible for a station still using analogue equipment to convert its signal to digital before it is broadcast, or for a station to use digital equipment but convert the signal to analogue for broadcasting, or they may have a mix of both digital and analogue equipment. Digital TV signals require less transmission power to be broadcast and received satisfactorily. [1]
The switchover process is being accomplished on different schedules in different countries; in some countries it is being implemented in stages as in Australia, Greece, India or Mexico, where each region has a separate date to switch off. In others, the whole country switches on one date, such as the Netherlands. [2] On 3 August 2003, Berlin became the world's first city to switch off terrestrial analogue signals. [3] Luxembourg was the first country to complete its terrestrial switchover, on 1 September 2006. [4]
Different standards have been developed for the broadcast transmission of digital terrestrial television, comparable to the older analog standards they replace: NTSC, PAL and SECAM. Broadcasters around the world choose and adopt one of these to be the format and technology behind the transmission. The standards are:
The "RRC-06" agreement in Geneva (hosted by the International Telecommunication Union (ITU)) was signed by delegates from many countries, including most of Europe, Africa and Asia. The agreement set 17 June 2015 as the date after which countries may use frequencies currently assigned for analog television transmission for digital services (specifically DVB-T), without being required to protect the analog services of neighbouring countries against interference. This date was generally viewed as an internationally mandated analog switch-off date, at least along national borders [33] —except for those operating on the VHF band which would be allowed until 17 June 2020. [34] [ needs update ]
These deadlines set by the agreement have been difficult to reach in certain regions, like in Africa where most countries missed the 2015 deadline, [35] as well as South East Asia. [36] High upgrade costs are often a reason cited for the slow transition in those regions.
The European Commission, on a different note, had recommended on 28 October 2009 that digital switchover should be completed by 1 January 2012. [37]
Analog-only TVs are incapable of receiving over-the-air broadcasts without the addition of a set-top converter box. Consequently, a digital converter box – an electronic device that connects to an analog television – must be used to allow the television to receive digital broadcasts. In the United States, the government subsidized the purchase of such boxes for consumers via their coupon-eligible converter box program in 2009, funded by a small part of the billions of dollars brought in by a spectrum auction. The program was managed by the Department of Commerce through its National Telecommunications and Information Administration.
Televisions with integrated digital tuners have been available for a considerable time. This means that a set-top box is usually no longer necessary with a new TV set.
Satellite broadcasting switched to digital much earlier than terrestrial broadcasting. The switchover process is much easier for satellite since only changes to the earth station equipment are needed on the transmission side and consumers are already used to having a set top box/decoder. In many places, the satellite switchover was complete before terrestrial switchover was even started. Cable on the other hand would switch off months, if not years after terrestrial would.[ citation needed ]
In countries where terrestrial is little used, the migration to digital satellite or cable is more realized. For instance, in Switzerland or the UAE, where terrestrial has low usage, the terrestrial switchover was not noticed by the general population. But in countries where terrestrial is the dominant method of watching TV, like Japan, Spain or Thailand, the switchover is a big deal as it affects the majority of the population.[ citation needed ]
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The DTV "nightlight" video that was produced by the National Association of Broadcasters for broadcast by its participating members. [137] |
Digital Video Broadcasting (DVB) is a set of international open standards for digital television. DVB standards are maintained by the DVB Project, an international industry consortium, and are published by a Joint Technical Committee (JTC) of the European Telecommunications Standards Institute (ETSI), European Committee for Electrotechnical Standardization (CENELEC) and European Broadcasting Union (EBU).
Terrestrial television or over-the-air television (OTA) is a type of television broadcasting in which the content is transmitted via radio waves from the terrestrial (Earth-based) transmitter of a TV station to a TV receiver having an antenna. The term terrestrial is more common in Europe and Latin America, while in Canada and the United States it is called over-the-air or simply broadcast. This type of TV broadcast is distinguished from newer technologies, such as satellite television, in which the signal is transmitted to the receiver from an overhead satellite; cable television, in which the signal is carried to the receiver through a cable; and Internet Protocol television, in which the signal is received over an Internet stream or on a network utilizing the Internet Protocol. Terrestrial television stations broadcast on television channels with frequencies between about 52 and 600 MHz in the VHF and UHF bands. Since radio waves in these bands travel by line of sight, reception is generally limited by the visual horizon to distances of 64–97 kilometres (40–60 mi), although under better conditions and with tropospheric ducting, signals can sometimes be received hundreds of kilometers distant.
DVB-T, short for Digital Video Broadcasting – Terrestrial, is the DVB European-based consortium standard for the broadcast transmission of digital terrestrial television that was first published in 1997 and first broadcast in Singapore in February 1998. This system transmits compressed digital audio, digital video and other data in an MPEG transport stream, using coded orthogonal frequency-division multiplexing modulation. It is also the format widely used worldwide for Electronic News Gathering for transmission of video and audio from a mobile newsgathering vehicle to a central receive point. It is also used in the US by Amateur television operators.
Digital terrestrial television is a technology for terrestrial television, in which television stations broadcast television content in a digital format. Digital terrestrial television is a major technological advancement over analog television, and has largely replaced analog television broadcasting, which was previously in common use since the middle of the 20th century.
Digital terrestrial television in the United Kingdom encompasses over 100 television, radio and interactive services broadcast via the United Kingdom's terrestrial television network and receivable with a standard television set. The majority of digital terrestrial television (DTT) services, including the five former analogue channels, are broadcast free-to-air, and a further selection of encrypted pay TV services are also available. Freeview is the only DTT service since Top Up TV closed in 2013.
The television industry in Turkey includes high-tech program production, transmission, and coverage. Turkish Radio and Television Corporation is Turkey's largest and most powerful national television station. As of 2022, there are 498 television channels in Turkey, ranking fourth in Europe in terms of the number of television channels. Turkey is the world's fastest-growing television series exporter and has currently overtaken both Mexico and Brazil as the world's second-highest television series exporter after the United States. Turkish television drama has grown since the early 2000s.
The digital switchover was the process by which analogue terrestrial television in the United Kingdom was replaced with digital terrestrial television. It is sometimes referred to as the "analogue switch off".
DTMB is the digital TV standard for mobile and fixed devices, developed in the People's Republic of China. It is used there and in both of their special administrative regions, and also in Cambodia, the Comoros, Cuba, East Timor, Laos, Vietnam, and Pakistan. In Pakistan, as part of the China–Pakistan Economic Corridor Project, ZTE Corporation will provide Pakistan Television Corporation collaboration across several digital terrestrial television technologies, staff training, and content creation, including partnerships with Chinese multinational companies in multiple areas, such as television sets and set top boxes, as a form of "International Cooperation".
DVB-T2 is an abbreviation for "Digital Video Broadcasting – Second Generation Terrestrial"; it is the extension of the television standard DVB-T, issued by the consortium DVB, devised for the broadcast transmission of digital terrestrial television. DVB has been standardized by ETSI.
There are four major forms of digital television (DTV) broadcast in the United Kingdom: a direct-to-home satellite service from the Astra 28.2°E satellites provided by Sky UK, a cable television service provided by Virgin Media ; a free-to-air satellite service called Freesat; and a free-to-air digital terrestrial service called Freeview. In addition, an IPTV system known as BT TV is provided by BT. Individual access methods vary throughout the country. 77% of the United Kingdom has access to HDTV via terrestrial digital television. Satellite is the only source of HDTV broadcast available for the remaining 23%.
Television in France was introduced in 1931, when the first experimental broadcasts began. Colour television was introduced in October 1967 on La Deuxième Chaîne.
In Malaysia, digital television broadcasts, DTV or DHD, can be received via cable, internet, satellite, or via free over-the-air (OTA) digital terrestrial television - much like analogue television broadcasts have been. It began in the mid-1990s with the introduction of the Astro satellite television service, now followed by new paid television services in the 2000s, as well as the digitalisation of over-the-air TV which was expected to be complete by the mid-2010s before being shelved. This article discusses various platforms where DTV is applied in Malaysia, including Digital Video Broadcasting (DVB) and Internet Protocol Television (IPTV). Following its successful nationwide digital transition on 31 October 2019, the country became the third in Southeast Asia with digital broadcasts after neighbouring Brunei and Singapore.
Digital terrestrial television in the Philippines began in 2015 with the implementation of ISDB-T, currently coexisting with analog television that operates on the NTSC standard after the set analog switch-off (ASO) deadline encountered multiple postponements.
Television in Northern Ireland is available using, digital terrestrial, digital satellite and cable.
Television in Belgium was introduced in 1953 and began with one channel each in Dutch and French. The country is heavily cabled, with 93% of households watching television through cable as of 2003.
Television in Poland was introduced on an experimental basis in 1937. It was state owned, and was interrupted by the Second World War in 1939. Television returned to Poland in 1952 and for several decades was controlled by the communist government. Colour television was introduced in Poland in 1971. Private television stations in Poland appeared around the time of the fall of communism, with PTV Echo becoming the first private station in Poland.
Television is the most popular medium in Russia, with 74% of the population watching national television channels routinely and 59% routinely watching regional channels. There are 6,700 television channels in total. Before going digital television, 3 channels have a nationwide outreach : Channel One, Russia-1 and NTV.
Russian Television and Radio Broadcasting Network (RTRN) (Russian: Российская телевизионная и радиовещательная сеть) is a unitary enterprise created on August 13, 2001, by decree of the president of the Russian Federation. The company is included in the list of Russian strategic enterprises.
Saorview is the national digital terrestrial television (DTT) service in Ireland. It is owned by RTÉ and operated by 2RN.
The provinces mentioned in the final analogue switch-off include: Hà Giang, Cao Bằng, Bắc Kạn, Tuyên Quang, Lào Cai, Yên Bái, Lạng Sơn, Điện Biên, Lai Châu, Sơn La, Hòa Bình, Kontum, Gia Lai, Đắklắk and Đắc Nông.
Since last night (at 0:00 on 28 December 2020), 15 more provinces have stopped broadcasting analogue terrestrial television. These are the provinces in group IV and also the last ones to stop broadcasting analogue terrestrial television according to the plan of the project "Digitisation of television".
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: CS1 maint: archived copy as title (link)ANNOUNCEMENT Saturday, 27 December 2014 the morning will begin digital broadcasting (while stopping analogue) of the centers: Agios Athanasios Water Tower Gate Tsotyli Vounasa Royal Polygyros Delvinaki Curse Granitsopoula Igoumenitsa Korfovouni Amfilochia Those viewers covered by these centers will need to have receiver (TV or decoder) that supports MPEG4 technology and coordinate the morning of 27 December the new frequencies. Those viewers already receive terrestrial digital TV signal need not make any action.
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: CS1 maint: numeric names: authors list (link)Thủ tướng Chính phủ đã ban hành Quyết định số 2451/QĐ-TTg phê duyệt Đề án "Số hóa truyền dẫn, phát sóng truyền hình mặt đất đến năm 2020" (gọi tắt là Đề án Số hóa truyền hình), trong đó quy định trước ngày 31-12-2020 kết thúc phát sóng truyền hình analog tại 63 tỉnh, thành phố chuyển sang truyền hình số mặt đất.
The provinces mentioned in the analogue switch-off include: Quảng Ninh, Thái Nguyên, Ninh Bình, Bắc Giang, Phú Thọ, Đồng Nai, Bình Thuận, Bà Rịa – Vũng Tàu, Khánh Hòa, Thanh Hóa, Nghệ An, Hà Tĩnh, Quảng Bình, Quảng Trị, Thừa Thiên Huế, Quảng Nam, Quảng Ngãi, Bình Định, Phú Yên, Lâm Đồng and Ninh Thuận.
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