Sanyo Electric Co., Ltd.

Yutaka Imamura

Toshihiko Hiroshima

Akira Tsukihashi

Yasushi Hanamoto

Toru Tanaka

Shinji Seki

An operation for recording a recording signal onto a disk () is interrupted, when an amount of signal data stored in a buffer RAM () for temporarily storing the recording signal is less than an interruption setting value during performing of the recording operation. Moreover, when the amount of signal data stored in the buffer RAM () increases and indicates a resumption setting value, the signal recorded on the disk () before interruption is reproduced, and the recording operation is resumed based on the reproduced signal. Moreover, recording properties are detected by the signal reproduced before resumption of recording.

Optical disk recording/reproducing method and apparatus in which recording properties of the disk are detected when recording speed is changed

A disk divided into a trial writing region, buffer region, read-in region, program region, and read-out region disposed from an inner peripheral side toward an outer peripheral side is rotated at a constant angular speed. A test signal is recorded in the trial writing region and an outer peripheral region disposed outside the read-out region, the recorded test signals are read, and a laser output value is set based on the reproduced test signals of the two regions.

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Sawa-gun, Japan

Yutaka Imamura