Optical disc apparatus and information recording method

Abstract

Provided is a technology for improving the recording quality through edge correction of recording pulse in an optical disc apparatus. An optimum recording power of recording pulse is obtained through OPC processing according to a recording strategy with a first pulse timing; recording is performed by use of recording pulse with the optimum recording power; a first edge-shift amount of recording mark is measured from a reproduction signal to perform edge correction of recording pulse to form a second pulse timing of a recording strategy. Subsequently, recording is performed with pulse width variations of recording pulse to measure a second edge-shift amount of recording mark from a reproduction signal; and optimum edge positions of recording pulse are calculated based on the first edge-shift amount and the second edge-shift amount.

Description

technical field [0001] The present invention relates to an information recording technique in an optical disc device, and particularly relates to a technique for correcting the edge of a recording pulse in a predetermined recording strategy. Background technique [0002] Generally speaking, in an optical disc device, OPC (Optimum Power Control: Optimum Power Control) processing is performed before the recording operation, so that a recording pulse with an optimal recording power in a prescribed recording strategy can be generated, but the optical disc device itself The optimum recording pulse edge position of the recording pulse often deviates due to variations in performance, variations in the optical disc, and the like. If the pulse edge position of the recording pulse is inappropriate, the mark length and edge position of the recording mark recorded on the optical disc deviate from the appropriate range, deteriorating the reproduction quality of information such as image ...

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, in an optical disc device, OPC (Optimum Power Control: Optimum Power Control) processing is performed prior to the recording operation, so that a recording pulse with an optimal recording power in a prescribed recording strategy can be generated, but the optical disc device itself Deviations in performance and deviations of the optical disc, etc., often cause the best recording pulse edge position of the recording pulse to deviate

If the pulse edge position of the recording pulse is not appropriate, the mark length and edge position of the recording mark recorded on the optical disc will deviate from the appropriate range, and the reproduction quality of information such as image jitter characteristics will deteriorate during reproduction.

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