| 摘要 |
PROBLEM TO BE SOLVED: To simplify trace back processing in viterbi decoding. SOLUTION: Corresponding to a variable state bit for an input encoding bit, a maximum likelihood transition source state bit is selected depending on a path metric of the state bit to be stored in a survival memory. Accordingly, in trace back processing, only by repeatedly extracting a most significant bit of the transition source state bit, a decoding bit can be outputted. Therefore, the trace back processing can be quite easily performed, and decoding processing in a short time is made possible even if a software is executed by a generalized processor. COPYRIGHT: (C)2007,JPO&INPIT
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