Error-correcting decoder continuously adding flag signals to locations preceding a first location at which a difference between path metrics is lower than the threshold
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United States of America Patent
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-
Aug 22, 2000
Grant Date -
N/A
app pub date -
Oct 6, 1997
filing date -
Oct 18, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an error-correcting decoder, in which an input digital signal including reliability information is decoded by using a Viterbi algorithm as a first decoding process and a final decoded result is obtained by block-code decoding as a second decoding process, a flag signal is added to a location where a value of reliability of path metric determined by the Viterbi algorithm is lower than a threshold, as an original flagged location. A flag signal adding unit continuously adds flag signals to locations, from the original flagged location to locations preceding the originally flagged location, after back tracing. The flagged locations are then regarded as erasure locations in the block-code decoding process.
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