Circuit for controlling delay time between luminance and chromin

Details Circuit for controlling delay time between luminance and chromin Circuit for controlling delay time between luminance and chromin

1991-06-10

1992-10-27

Groody, James J.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 19, H04N 9455

Patent

active

051594390

ABSTRACT:
A circuit for automatic control of delay time between luminance and chrominance signals is disclosed. The delay time control circuit of the present invention comprises: a clock pulse generator that passes a certain number of clock pulses during a period of time between the positive-going edge of the horizontal synchronizing signal from a horizontal synchronizing separator and the leading edge of the color burst signal from a color burst signal separator; a comparator that compares the number resultant clock pulses to a reference value and determines which signal (the luminance or the chrominance signal) is delayed and the length of the delay time; a luminance delay circuit and a chrominance delay circuit that delay the luminance and chrominance signal respectively according to outputs of the comparator; and a luma/chroma mixer that mixes the delayed luminance and chrominance signals. Therefore, the present invention improves picture quality by adjusting the delay time between the luminance and chrominance signals which occur in various kinds of VTR's and video tapes.

REFERENCES:
patent: 4344075 (1982-08-01), Rudy
patent: 4485395 (1984-11-01), Warren

Affiliated with

Also associated with

Rating

Circuit for controlling delay time between luminance and chromin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Circuit for controlling delay time between luminance and chromin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Circuit for controlling delay time between luminance and chromin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-909654