Zero crossing level matching apparatus and method

Details Zero crossing level matching apparatus and method Zero crossing level matching apparatus and method

1998-08-25

2000-10-31

Tran, Thang V.

Dynamic information storage or retrieval

Binary pulse train information signal

Binary signal gain processing

36912415, G11B 700

Patent

active

061413089

ABSTRACT:
A zero crossing level matching apparatus for effectively processing a reproducing signal including two or more components having different zero crossing levels. In the apparatus, a reproducing signal picked up from a recording medium having signal tracks divided into user information fields and identification fields and including first and second signal components having different zero crossing levels in correspondence with the fields is compared with a reference signal by a comparator to detect a data stream. The data stream generated at the comparator is integrated by first and second integrators to detect the zero crossing levels of the first and second signal components. The output signals of the first and second integrators are selectively applied as the reference signal in accordance with whether any one of the first and second signal components is included in the reproducing signal.

REFERENCES:
patent: 5276664 (1994-01-01), Shikunami
patent: 5490127 (1996-02-01), Ohta et al.
patent: 5781521 (1998-07-01), Kim
patent: 5974088 (1999-10-01), Chang

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