Video blanking system for a video cassette recorder combined wit

Details Video blanking system for a video cassette recorder combined wit Video blanking system for a video cassette recorder combined wit

1989-06-27

1992-02-18

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358183, H04N 576

Patent

active

050898981

ABSTRACT:
A video blanking system for a VCR combined with a video camera which enables the picture to occupy the screen gradually and to be gradually removed from the screen at the start and at the end of recording respectively as if a curtain rises or falls across the front of the screen. The video blanking system includes a key input device for selecting a blanking function, a device for blanking a video signal from a camera section to a VCR section, a device for separating the video signal into vertical and horizontal synchronizing signals, and a signal processing device which sends a control signal to the blanking device in proportion to a period which corresponds to the number of horizontal synchronizing signals equal to the vertical synchronizing input to the signal processing device.

REFERENCES:
patent: 4395733 (1983-07-01), Elenbaas
patent: 4488180 (1984-12-01), Rabinowitz
patent: 4780763 (1988-10-01), McFetridge et al.

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