11 Facts About ATSC


ATSC standards were developed in the early 1990s by the Grand Alliance, a consortium of electronics and telecommunications companies that assembled to develop a specification for what is known as HDTV.

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ATSC technology was primarily developed with patent contributions from LG Electronics, which holds most of the patents for the ATSC standard.

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ATSC includes two primary high definition video formats, 1080i and 720p.

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Many aspects of ATSC are patented, including elements of the MPEG video coding, the AC-3 audio coding, and the 8VSB modulation.

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Broadcasters who used ATSC and wanted to retain an analog signal were temporarily forced to broadcast on two separate channels, as the ATSC system requires the use of an entire separate channel.

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Channel numbers in ATSC do not correspond to RF frequency ranges, as they did with analog television.

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Transport, ATSC uses the MPEG systems specification, known as an MPEG transport stream, to encapsulate data, subject to certain constraints.

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ATSC uses 188-byte MPEG transport stream packets to carry data.

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ATSC signal is more susceptible to changes in radio propagation conditions than DVB-T and ISDB-T.

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In spite of ATSC's fixed transmission mode, it is still a robust signal under various conditions.

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Mobile reception of digital stations using ATSC has, until 2008, been difficult to impossible, especially when moving at vehicular speeds.

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