Chroma noise reduction device

Details Chroma noise reduction device Chroma noise reduction device

1994-06-06

1995-03-21

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348621, 348630, H04N 964

Patent

active

054000858

ABSTRACT:
A chroma noise reduction device comprises an 1H delay element, first and second variable delay units, variable amplifier, first and second adder amplitude restricting circuit, first and second subtracters and first, second and third phase detectors. The first phase detector compares the phases of a delay signal of a second variable delay unit and chroma signal supplied to the second variable delay unit and controls the second variable delay circuit to have the phase of the delay signal 90.degree.-delayed relative to the chroma signal. The second phase detector compares the phases of the delay signal and output signal of the variable amplifier and controls the phase of the first variable delay unit in response to a result of comparison. The third phase detector compares the phases of a sum signal of the delay signal and output signal of the variable amplifier and a difference signal of the delay signal and output signal of variable amplifier and controls the amplitude of the variable amplifier.

REFERENCES:
patent: 4701787 (1987-10-01), Fujiwara
patent: 4703343 (1987-10-01), Honjo
patent: 4979025 (1990-12-01), Ichinoi
patent: 5177600 (1993-01-01), Monta et al.

Affiliated with

Also associated with

Rating

Chroma noise reduction device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chroma noise reduction device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chroma noise reduction device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1152640