Television synchronizing signal processing circuit

Details Television synchronizing signal processing circuit Television synchronizing signal processing circuit

H - Electricity

04

N

352/32.2, 352/18

H04N 5/781 (2006.01) H04N 5/932 (2006.01)

Patent

CA 1246218

Abstract of the Disclosure A television synchronizing signal processing cir- cuit 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 syn- chronizing 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 synchro- nizing 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 0 < TD < H/2.

498910

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