摘要 |
An optical information reproducing method for demodulating the information recorded on a recording medium (15) by a viterbi decoding method, in which data can be demodulated with high accuracy even if the recording power has undergone variations at the time of recording the information. Data recorded on the recording medium (5) after modulation (12) in which the minimum length between transitions is limited to not less than 2 is decoded using the viterbi decoding method. A specified signal recorded on the recording medium (5) is used for setting (22) the reference value used for viterbi decoding (23). <IMAGE> |