Video signal noise reduction circuit for a video demodulator com

Details Video signal noise reduction circuit for a video demodulator com Video signal noise reduction circuit for a video demodulator com

1992-12-17

1995-05-16

Groody, James J.

Television

Image signal processing circuitry specific to television

Noise or undesired signal reduction

348726, 329320, 329326, H04N 5213

Patent

active

054165300

ABSTRACT:
Video noise reduction is achieved by limiting the loop response bandwidth in a phase locked loop demodulator with a high-pass RC network connected between two oppositely phased video signals in the phase detector for out-phasing a high frequency component of the loop response bandwidth. Easy user adjustment allows viewable video images to be obtained from very noisy signals in deep fringe reception areas.

REFERENCES:
patent: 3983488 (1976-09-01), Bush
patent: 4035730 (1977-07-01), Clayton
patent: 4353093 (1982-10-01), Durbin
patent: 4479091 (1984-10-01), Yoshisato
patent: 4514763 (1985-04-01), Rindal
patent: 5233425 (1993-08-01), Rabii

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