System for detection of readout signals from optical disc

Details System for detection of readout signals from optical disc System for detection of readout signals from optical disc

1994-12-27

1996-10-01

Epps, Georgia Y.

Dynamic information storage or retrieval

Control of storage or retrieval operation by a control...

Mechanism control by the control signal

369 58, G11B 509

Patent

active

055616470

ABSTRACT:
An equalizer is controlled to equalize a signal read from an optical disc. The equalized signal is supplied to a maximum-likelihood sequence detection circuit, in which a signal sequence is detected to be most coincident to the equalized signal among signal sequences meeting a state transition regularity. The equalizer operates for equalization, only when an error signal is detected in the vicinity of the end of a region having a code transition interval of more than number of minimum transition interval.

REFERENCES:
patent: 5262904 (1993-11-01), Tang et al.
patent: 5345452 (1994-09-01), Matsui

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