Mitsubishi Electric Corporation

Masayuki Ohmaki

Nobuo Takeshita

Kenya Nakai

A first signal is detected from the central part of a light beam returning from a super-resolution optical disc; a second signal is detected from a peripheral part in a direction corresponding to a track on the super-resolution optical disc; a gain adjustment unit is provided to adjust the amplitude of the first signal; a subtraction unit is provided to generate a third signal by subtracting, from the second signal, the first signal with the amplitude adjusted by the gain adjustment unit; and an unit is provided to generate a reproduced signal by combining the first signal and a signal obtained by delaying the third signal.

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Tokyo, Japan

Masayuki Ohmaki