Phase-converting circuit for superimpose control

Details Phase-converting circuit for superimpose control Phase-converting circuit for superimpose control

1993-12-29

1994-12-06

Kostak, Victor R.

Television

Camera, system and detail

Combined image signal generator and general image signal...

348589, 348600, 348520, 358906, H04N 5262, H04N 5278

Patent

active

053715411

ABSTRACT:
A superimpose control device which enables a superimpose function even in a VTR mode, by using a phase convening circuit for synchronizing the phase of a sub-carrier signal with the color burst signal of an applied video signal. The device includes a memory for storing the signal applied through a camera as title data; a luminance/chrominance signal separator for isolating only the color signal from either of the applied video signals; an automatic color signal control circuit for regulating the color burst signal level using the color signals output from the luminance/chrominance signal separator and those from a video reproduction circuit, as an input signal; a phase difference detector for detecting phase differences between the signal output from the automatic color signal control circuit and the sub-carrier signal; an oscillator for synchronizing the sub-carrier signal with the phase of the color burst signal and for outputting the result in accordance with the output signal of the phase difference detector; a phase-converting circuit for convening the phase of the sub-carrier signal output from the oscillator; a color modulator for modulating the color difference signal of the title data read from the memory by the output signal of the phase converting circuit; an adder for adding the output signal of the color modulator and the luminance signal output from the memory, and a selector for selectively outputting the output signal of the adder and the signal applied to a video camera system.

REFERENCES:
patent: 5016112 (1991-05-01), Nakajima

Affiliated with

Also associated with

Rating

Phase-converting circuit for superimpose control does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Phase-converting circuit for superimpose control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Phase-converting circuit for superimpose control will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-217737