Canon Kabushiki Kaisha

Sunichi Shido

Kunihiro Sakai

Katsunori Hatanaka

Takahiro Oguchi

Akihiko Yamano

An information processing apparatus for effecting at least one of the recording and reproduction of information with probes on a recording medium having tracking grooves is disclosed. In the apparatus, a probe head having plural probes is moved relative to the recording medium, a signal based on a physical phenomenon between each probe and the recording medium is detected from each probe, a position signal indicating a position of the tracking groove is extracted from the detected signal, a reference clock signal is generated, and a start timing of reproduction or recording of the information is determined based on the phase relationship between the position signal and the reference clock signal.

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Sagamihara, Japan

Sunichi Shido