Processing of a detection signal obtained by scanning an optical

Details Processing of a detection signal obtained by scanning an optical Processing of a detection signal obtained by scanning an optical

1987-04-28

1989-05-09

Psitos, Aristotelis M.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

360 67, 360 65, G11B 2736

Patent

active

048294993

ABSTRACT:
An information signal reconstructing method and apparatus for use in an optical disk system is provided. Data stored on an optical disk in a binary format is optically scanned by a photodetector to provide a detection signal. The average of this detection signal is first determined and then, using the thus determined average, the detection signal is subjected to an amplitude limiting operation so that there is obtained an output signal as an information signal reflecting the binary information of the data stored on the optical disk. During the amplitude limiting operation, the signal is so processed to have the same positive and negative amplitudes with respect to the average which is set at a zero level.

REFERENCES:
patent: 4371900 (1983-02-01), Huber
patent: 4399474 (1983-08-01), Coleman, Jr.
patent: 4499570 (1985-02-01), Schouhamer Immick et al.

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