Processing circuit for television sync signals produced from a r

Details Processing circuit for television sync signals produced from a r Processing circuit for television sync signals produced from a r

1985-12-30

1988-08-23

Richardson, Robert L.

Dynamic magnetic information storage or retrieval

Monitoring or testing the progress of recording

360 101, 360 351, 358148, 358909, 358342, H04N 578, H04N 504

Patent

active

047665068

ABSTRACT:
A television synchronizing signal processing circuit includes a reproduction/demodulation circuit for repetitively reading a video signal corresponding to one field from a video signal recording medium and demodulating the video signal and for separating a synchronizing signal from a reproduced/demodulated signal, a first delay circuit for permitting the video signal of the reproduced/demodulated signal which is supplied for every other field from the reproduction/demodulation circuit to be delayed by a time corresponding to one half the period H of a horizontal synchronizing signal, a second delay circuit for delaying a vertical synchronizing signal of the synchronizing signal which is supplied from the reproduction/demodulation circuit, and a waveform synthesizing circuit for synthesizing output signals from the first and second delay circuits to produce a composite video signal. In the processing circuit, the second delay circuit has a variable time TD which is variable within a range of

REFERENCES:
patent: 3585291 (1971-06-01), Yamakawa
patent: 4104684 (1978-08-01), Wakami et al.
patent: 4143405 (1979-03-01), Kubota
patent: 4229773 (1980-10-01), Sakamoto
patent: 4268875 (1981-05-01), Morio et al.
patent: 4542416 (1985-09-01), Honjo et al.
patent: 4613914 (1986-09-01), Kobori et al.

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