CODING METHOD, CODER, DECODING METHOD, DECODER, CODER-DECODER, INFORMATION STORAGE METHOD, MEDIUM AND INFORMATION STORAGE DEVICE

摘要

PROBLEM TO BE SOLVED: To correct an error included in data more correctly in the case of decoding read data. SOLUTION: In the case of recording data, data to be recorded are coded by a trelis coding encoder 504, and a code word stream generated by the trelis coding encoder 504 is recorded in an 8value flush memory 511, and status information obtained by the coding is stored for each prescribed time in a binary flush memory 506. On the other hand, in the case of reproducing data, the status information is fed from the binary flush memory 506 to a Viterbi detector 522, and a survival path is forcibly revised by using the status information in the case of decoding the code word stream acquired from the 8-value flush memory 511 by using a trelis code decoder 523.