Reproduction method, optical disk drive, and IC circuit

Details Reproduction method, optical disk drive, and IC circuit Reproduction method, optical disk drive, and IC circuit

2005-09-28

2010-06-15

Dinh, Tan X (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S047530, C369S053340, C369S053270, C369S059110

Reexamination Certificate

active

07738332

ABSTRACT:
In an optical disk drive that is equipped with a binarization circuit by the PRML method and carries out record/reproduction at a speed higher than a standard speed, to realize reproduction compatibility between the drive and another optical disk drive by the ordinarily adopted direct slice method. It can be realized by applying verification judgment equivalent to reproduction at a standard speed in accordance with a reproduction speed. More specifically, it is realized by counting 2 T data number by the direct slice method, using a Viterbi decoder that validates a run length shorter than the minimum run length, and adopting other measures. A higher record/reproduction speed is realized while reproduction compatibility, which is an important original function of an interchangeable optical disk, is secured.

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