Multiplexed coded modulation with unequal error protection

Details Multiplexed coded modulation with unequal error protection Multiplexed coded modulation with unequal error protection

1990-12-13

1993-05-25

Canney, Vincent P.

Excavating

375 39, G06F 1100

Patent

active

052146561

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.

REFERENCES:
U.S. patent application Ser. No. 7/363,793, Wang et al., filed Jun. 9, 1989.

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