Intersymbol interference detection in an optical recording syste

Details Intersymbol interference detection in an optical recording syste Intersymbol interference detection in an optical recording syste

1996-02-29

1998-03-10

Huber, Paul W.

Dynamic information storage or retrieval

Specific detail of information handling portion of system

Radiation beam modification of or by storage medium

369 54, G11B 700, G11B 390

Patent

active

057269653

ABSTRACT:
An apparatus and method for use in an optical recording system in which an incident beam records data on an optical recording medium as marks and in which a return beam reflected from the medium is detected in an optical detector to provide a reflected write signal. A number of reflected write pulses of the reflected write signal are monitored in an interference detector. The peak voltage or other suitable characteristic of a reflected pulse corresponding to a mark following a relatively short land is compared to the same characteristic of another reflected pulse corresponding to a mark following a longer land. An error signal is generated based on the comparison and provides an indication of the amount of intersymbol interference (ISI) present during recording of the marks corresponding to the first and second reflected pulses.

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Philips CDD521 Service Manual, Professional Compact Disc Recorder, published by Serice & Support Interactive Media Systems, The Netherlands.

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