Crosstalk detector for optically read signals

Details Crosstalk detector for optically read signals Crosstalk detector for optically read signals

1994-02-17

1996-01-02

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358336, 358328, 348607, 348609, 348618, 348622, H04N 576, H04N 5911

Patent

active

054813697

ABSTRACT:
A crosstalk detector for detecting the crosstalk of signals optically read from a recording medium having a plurality of tracks. A changeover circuit selects one of first and second signals generated by first and second oscillators. The amplitude of a signal of a predetermined center frequency is extracted from the selected signal and RF signal and that amplitude is compared with a control signal that inverts at every horizontal synchronizing period of a video signal demodulated from the RF signal.

REFERENCES:
patent: 4456930 (1984-06-01), Hashimoto
patent: 4491877 (1985-01-01), Kanamaru
patent: 4745486 (1988-05-01), Ohira et al.
patent: 4852074 (1989-07-01), Tanaka et al.
patent: 5032915 (1991-07-01), Ichimura

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