Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1993-03-03
1995-04-25
Pascal, Robert J.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 47, 369100, G11B 1722
Patent
active
054105226
ABSTRACT:
An apparatus, having a spindle motor for rotating a circular optical disk, for recording information on the optical disk rotated by the spindle motor, and reproducing information recorded on the optical disk, wherein whether the recording scheme of the optical disk is a mark interval or mark length recording scheme is discriminated, and information is recorded or recorded information is reproduced while the optical disk is rotated at a rotational speed corresponding to the discriminated recording scheme. In an apparatus for recording/reproducing information in accordance with both the mark interval and mark length recording schemes, a signal amplifier, a demodulation circuit, a modulation circuit, an error correction circuit, a buffer memory, an interface circuit, and the like can be commonly used between the two recording schemes, thereby decreasing the number of signal processing circuits.
REFERENCES:
patent: 4896311 (1990-01-01), Ishihara
patent: 5003527 (1991-03-01), Matsumoto et al.
patent: 5056075 (1991-10-01), Makuta et al.
patent: 5142521 (1992-08-01), Terashima et al.
patent: 5214627 (1993-05-01), Nakashima
Suzuki Katsumi
Yokota Tsuneshi
Yoshimaru Tomohisa
Kabushiki Kaisha Toshiba
Neyzari Ali
Pascal Robert J.
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