Multiplexed coded modulation with unequal error protection
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United States of America Patent
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May 25, 1993
Grant Date -
N/A
app pub date -
Dec 13, 1990
filing date -
Dec 13, 1990
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Unequal error protection is provided for an HDTV signal by separately coding each one of the classes of information in the HDTV signal by using a conventional coded modulation scheme and then time-division-multiplexing the various coded outputs for transmission. In particular, each class of information is separately coded by a 4-dimensional 8-state trellis code and a uniformly-spaced (QAM) signal constellation.
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