Dynamic information storage or retrieval – Information location or remote operator actuated control – Selective addressing of storage medium
Patent
1994-03-08
1998-04-14
Hindl, Nabil Z.
Dynamic information storage or retrieval
Information location or remote operator actuated control
Selective addressing of storage medium
369124, 369 48, 369 54, G11B 700
Patent
active
057401411
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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Kadowaki Shin-ichi
Sano Kousei
Hindl Nabil Z.
Matsushita Electric - Industrial Co., Ltd.
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