The transition to high-definition television is a process by which standard-definition (SD) television signals are upgraded to a high-definition (HD) format. [1] In this process, channels usually either simulcast their HD signals alongside the existing SD signals or broadcast exclusively in HD. The transition to the latter is often called the standard-definition television switch-off.
In most territories worldwide, the complete shutdown of the lower-resolution signals has not yet begun or is still in its early stages, notably in the many countries still undergoing the analogue switch-off.
In territories and services where SD signals have already ceased, television sets that do not support terrestrial HD signals are required to be replaced or equipped with set-top boxes compatible with HD signals. [1] [2] [3] In some cases, this switch-off has led to a high demand for new set-top boxes and TV sets, resulting in shortages. [4]
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).
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.
Televisió de Catalunya is the public broadcasting network of Catalonia, one of the seventeen autonomous communities of Spain.
Freesat is a British free-to-air satellite television service, first formed as a joint venture between the BBC and ITV plc and now owned by Everyone TV. The service was formed as a memorandum in 2007 and has been marketed since 6 May 2008. Freesat offers a satellite alternative to the Freeview service on digital terrestrial television, with a broadly similar selection of channels available without subscription for users purchasing a receiver.
Digital terrestrial television in Australia commenced on 1 January 2001 in Sydney, Melbourne, Brisbane, Adelaide and Perth using DVB-T standards. The phase out of analogue PAL transmissions began on 30 June 2010 and was completed by 10 December 2013.
In broadcasting, digital subchannels are a method of transmitting more than one independent program stream simultaneously from the same digital radio or television station on the same radio frequency channel. This is done by using data compression techniques to reduce the size of each individual program stream, and multiplexing to combine them into a single signal. The practice is sometimes called "multicasting".
Animax is an Asian pay television channel owned by KC Global Media Asia. The channel was originally owned by Sony Pictures Entertainment, and took its name from the Japanese satellite TV network; which was then-majority owned by subsidiary Sony Pictures Entertainment Japan. The channel would be sold to its current owners on January 1, 2020.
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 EE TV is provided by EE. 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%.
High-definition television in the United Kingdom is available via cable, IPTV, satellite and terrestrial television. The first high-definition broadcasts began in late 2005 and since then the number of channels available to view has grown to a maximum of 87 that can be viewed on pay-TV service, Sky.
The Netherlands now has three major forms of broadcast digital television. Terrestrial (DVB-T), Cable (DVB-C), and Satellite (DVB-S). In addition IPTV services are available. At the end of the first quarter of 2013 almost 84% of the households in the Netherlands had some form of digital television.
Digital television in the United States is available via digital terrestrial television (DTT), digital cable, satellite television, and IPTV providers.
Television in Portugal was introduced in 1956 by Radiotelevisão Portuguesa, which held the nationwide television monopoly until late 1992. Regular broadcasting was introduced on March 7, 1957. Colour transmissions were introduced on March 10, 1980.
Television in Peru has a history of more than 60 years. There are 105 television broadcasters in Peru, 22 of which are in Lima. In regard to television receivers, in 2003 there were 5,470,000 — that is 200 televisions for every thousand inhabitants. The number of cable subscribers was 967,943 in 2011.
ATSC 3.0 is a major version of the ATSC standards for terrestrial television broadcasting created by the Advanced Television Systems Committee (ATSC).
High-definition television in Australia is available via cable, IPTV, satellite and terrestrial television. The first high-definition broadcasts began in 2001 and since then the number of channels available to view has grown to a maximum of 27 that can be viewed on pay-TV service, Foxtel.
Television in Catalonia, in reference to the autonomous community of Spain, is made up of television channels broadcast exclusively in Catalonia, whether for the whole of Catalonia or for certain regions and counties, as well as state-wide Spanish channels, which may or may not have disconnections from the general feed with exclusive programmes for Catalonia.
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