Protocol and procedure for automated channel change in an MPEG-2 compliant datastream
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United States of America Patent
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Jun 20, 2000
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app pub date -
Sep 26, 1997
filing date -
Sep 26, 1997
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Abstract
A method of changing the channels in a digital video and audio receiving system. The method includes receiving and decoding the encoded digital video and audio in a decoder, where the input is a multi-channel, time division multiplexed digital video and digital audio datastream. The datastream contains many Programs, each of the Programs includes a video packetized elementary stream, and an audio packetized elementary stream, each of which, in turn, contains a packet header, and packet data. The channel change method is a process of changing input channels from an old channel datastream to a new channel datastream with a minimum of latency. The method includes setting appropriate flags to request the channel change, acknowledging the requests, flushing buffers, muting audio output and/or freezing video output, and activating a data request line for new channel bitstream data.
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