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Another way is Internet Protocol television (IPTV), which is the delivery of TV over a computer network. Finally, an alternative way is to receive digital TV signals via the open Internet (Internet television), whether from a central streaming service or a P2P (peer-to-peer) system.
The five main ATSC formats of DTV currently [when?] broadcast in the U.S. are: . Standard definition—480i, to maintain compatibility with existing NTSC sets when a digital television broadcast is converted back to an analog one [citation needed] —either by a converter box or a cable/satellite operator's proprietary equipment
The elements of a simple broadcast television system are: . An image source. This is the electrical signal that represents a visual image, and may be derived from a professional video camera in the case of live television, a video tape recorder for playback of recorded images, or telecine with a flying spot scanner for the transfer of motion pictures to video).
Data transmitted may be digital messages originating from a data source, for example a computer or a keyboard. It may also be an analog signal such as a phone call or a video signal, digitized into a bit-stream for example using pulse-code modulation (PCM) or more advanced source coding (analog-to-digital conversion and data compression) schemes.
These are Dish TV (a ZEE TV subsidiary), Tata Sky, Sun Network owned 'Sundirect DTH', Reliance owned BIG TV, Bharti Airtel's DTH Service 'Airtel Digital TV' and the public sector DD Direct Plus. As of 2010, India has the most competitive Direct-broadcast satellite market with seven operators vying for more than 110 million TV homes.
Digital television broadcasting (especially satellite television) is widespread. [citation needed] Digital audio broadcasting is being adopted more slowly for radio broadcasting where it is mainly used in Satellite radio. [citation needed] Digital links, thanks to the use of data compression, generally have greater spectral efficiency than ...
In the US broadcast digital TV system, an ATSC receiver then decodes the TS and displays it on a TV. An ATSC ( Advanced Television Systems Committee ) tuner , often called an ATSC receiver or HDTV tuner , is a type of television tuner that allows reception of digital television (DTV) television channels that use ATSC standards , as transmitted ...
Interactive TV includes programs that directly incorporate polls, questions, comments, and other forms of audience response back into the show. For example, Australian media producer Yahoo!7 's Fango mobile app allows viewers to provide material that producers can insert into live programming.