Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1989-07-14
1991-02-26
Shoop, Jr., William M.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369 32, 369 47, 369 41, 369 43, G11B 2710
Patent
active
049966790
ABSTRACT:
An apparatus for playing a disc on which, in addition to a coded information signal, a digital information signal divided into blocks is recorded as a subcode together with a block identification signal for identifying the blocks, comprises a reading device for reading the coded information signal and the subcode from the disc, a decoder for decoding the subcode to produce an information signal, a repeater for repeating the subcode read out by the reading device to the decoder in response to a repeat command, and a controller for controlling the reading device and the repeater. The controller issues, in response to a command, a jump command for moving an information reading point of the reading device across M (M is a natural number) tracks in a direction retracing a reading direction every time a predetermined time period corresponding to the relative position of the information reading point in a radial direction of the disc elapses; detects, during a period between issuing of the jump command and issuing of the next jump command, an N-block period, in which N (N is a natural number) blocks of the subcode are read, by a block identification signal obtained from an output signal of the reading device; and supplies the repeating command to the repeater only during the N-block period.
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patent: 4800549 (1989-01-01), Yamagami et al.
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Cabeca John W.
Pioneer Electronic Corporation
Shoop Jr. William M.
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