Signal processing device for an optical information reproducing

Details Signal processing device for an optical information reproducing Signal processing device for an optical information reproducing

1995-09-25

1996-12-24

Ben, Loha

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369121, 369 54, 369 4432, 369 4434, 369 4425, 369109, G11B 700

Patent

active

055879853

ABSTRACT:
A signal processing device used for an apparatus capable of optically reproducing information from a recording medium is disclosed. In the signal processing device, a signal including information recorded at positions adjacent to a prescribed position is multiplied by k. The multiplied signal is subtracted from a signal mainly including information recorded at the prescribed position. In the signal processing device, the coefficient k is adjusted as follows. In one case, the coefficient k is varied depending on the signal strength. In another case, the processed signals are held at appropriate timings and a signal used as an index is obtained from two or more such signals. The coefficient k is optimized based on the index. In yet another case, the coefficient k is periodically varied in a synchronous manner with the fundamental period of the information recorded on the recording medium.

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K. Kayanuma et al., "High Track Density Magneto-Optical Recording Using a Crosstalk Canceler", SPIE, vol. 1316 Optical/Data Storage (1990), pp. 35-39.

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