FEC scheme for encoding two bit-streams

Details FEC scheme for encoding two bit-streams FEC scheme for encoding two bit-streams

2004-03-23

2009-08-04

Kim, Kevin Y (Department: 2611)

Pulse or digital communications

Receivers

Particular pulse demodulator or detector

C375S265000, C714S795000

Reexamination Certificate

active

07570720

ABSTRACT:
An encoding system is configured to allow data to be transmitted at one of two selectable bit-error-rate quality factors. The first bit-error-rate quality factor selection corresponds to the conventional ATSC FEC encoding systems, and the second bit-error-rate quality factor selection provides an ATSC-like FEC encoding scheme that substantially improves the bit-error-rate. The first quality factor selection effects a 2/3 trellis encoding, whereas the higher quality factor selection effects a 1/3 trellis encoding. Because the high-quality trellis encoding rate of 1/3 is half the lower-quality trellis encoding rate of 2/3, the data rate of this high-quality encoded bit-stream is half that of the conventional lower-quality encoded bit-stream. The 1/3 trellis encoding is effected using an ATSC-compatible encoding and a modified symbol mapping. The encoding scheme provides 2:1 data redundancy and the symbol mapping provides a maximum distance for the redundant encoding. By combining techniques that each decrease the likelihood of an uncorrectable error at the receiver, the substantial improvement in bit-error-rate can be achieved. At the receiver, a single trellis decoder with different metric tables is used to decode the two bit-streams, thereby providing substantial compatibility with ATSC-compatible receivers.

REFERENCES:
patent: 4677625 (1987-06-01), Betts et al.
patent: 4677626 (1987-06-01), Betts et al.
patent: 4726029 (1988-02-01), Motley et al.
patent: 6738949 (2004-05-01), Senda et al.
patent: 7054377 (2006-05-01), Betts
patent: 0986181 (2000-03-01), None

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