Chrominance signal playback system and method for video cassette

Details Chrominance signal playback system and method for video cassette Chrominance signal playback system and method for video cassette

1992-05-13

1995-02-14

Kostak, Victor R.

Television

Image signal processing circuitry specific to television

Color killer

358317, 358315, 348624, H04N 970, H04N 971

Patent

active

053899792

ABSTRACT:
An improved chrominance signal playback system and method for a video cassette recorder are disclosed. A radio frequency of composite video signal detected by a video head is applied to a low-pass filter which filters the composite video signal and outputs a low frequency of chrominance signal. The chrominance signal from the low-pass filter is automatically gain-controlled and is demodulated. The demodulated chrominance signal is applied to a color killer circuit. Also, an envelope detector detects an envelope signal from the chrominance signal from the low-pass filter. In response to the envelope signal, an attenuator attenuates the level of the chrominance signal from the color killer circuit. This results in the suppression of white noise in the chrominance signal. Therefore, the signal-to-noise ratio and the accompanying image quality can be enhanced.

REFERENCES:
patent: 3947871 (1976-03-01), Amari et al.
patent: 4253108 (1981-02-01), Engel
patent: 4357628 (1982-11-01), Wharton
patent: 4860091 (1989-08-01), Kimura et al.

Affiliated with

Also associated with

Rating

Chrominance signal playback system and method for video cassette does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Chrominance signal playback system and method for video cassette, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chrominance signal playback system and method for video cassette will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-290824