| 摘要 |
PROBLEM TO BE SOLVED: To equalize stably a reproduced signal to a target partial response waveform even when reproduction conditions such as tilt or beam diameter are varied in PRML detection being effective for high density reproduction. SOLUTION: Equalization is performed by the least square technique by using a predetermined number of data samples binarized by a viterbi decoder 3. Even when data written on an optical disk are unknown, the data can be equalized in a stable manner and can be reproduced at a low error rate without instability factors such as divergence due to interference. COPYRIGHT: (C)2008,JPO&INPIT
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