OPTICAL DISK DEVICE, SIGNAL PROCESSING LSI, LASER DRIVER, AND OPTICAL INFORMATION RECORDING METHOD

摘要

PROBLEM TO BE SOLVED: To provide stable recording performance in high speed recording by reducing the number of transmission lines from conventional transmission systems and avoiding deterioration of recording performance by transmission line properties in increasing recording speed, when recording pulse information is transmitted to a laser driver on a pickup in an optical disk.

SOLUTION: The number of transmission signals is decreased by encoding laser pulse information of multi-levels to be transmitted to the laser driver. Also skew restriction between bits is reduced by using a gray code to encoding. Further, encoding is performed by using status transition, occurrence of a short pulse in the transmission path is reduced by switching status transition by a recording mark and a space. Further, compatibility of correspondence for complex laser pulse information and correspondence for high speed recording can be performed.

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