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Digital television in the United States : ウィキペディア英語版 | Digital television in the United States :''See digital television for more technical details, or DTV transition in the United States for specific information related to the analog-to-digital switchover'' In the United States, digital television broadcasts, or DTV, can be received via cable, via internet, via satellite, or via free over-the-air (OTA) digital terrestrial television - much like analog television broadcasts have been. Full-power analog television broadcasts, however, were required by U.S. federal law to cease by June 12, 2009. Low-power, Class A, and TV Translator stations are not currently required to cease analog broadcasts. Also by law, digital broadcasts - when transmitted as OTA signals - must conform to ATSC standards.;〔FCC. (The Digital TV Transition FAQs )〕 it is unclear whether satellite operators are free to use their own proprietary standards; and many standards exist for internet television (most are proprietary). == Standards == (詳細はATSC standards for broadcast digital television. These standards define, among other things, format and transmission criteria that ensure consistency, accessibility, and fairness for consumers and equipment manufacturers alike in the U.S., as well as international compatibility.
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Digital television in the United States」の詳細全文を読む
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