DECODING DEVICE AND METHOD, PROGRAM RECORDING MEDIUM, AND PROGRAM

摘要

There are provided a decoding device and method, a program recording medium, and a program capable of improving the performance of decoding of a modulated code which has been encoded according to a variable length table. A 17PP-SISO decoding section (181) uses the Viterbi decoding algorithm and the BCJR decoding algorithm according to the 17PP encoding table (201) and the trellis expression expressed by a path 1-to-1 corresponding to each state transition of the entire encoding process, thereby SISO-decoding the signal from a PR-SISO decoding section (81) and supplying the SISO-decoded signal to a turbo decoding section (84) via a deinterleaver (83). The turbo decoding section (84) executes turbo decoding processing for the output from the 17PP-SISO decoding section (181). The present invention can be applied to a recording/reproduction device for recording and reproducing a signal onto/from a recording medium such as a high-density optical disc.