Video signal processing circuit for noise reduction

Details Video signal processing circuit for noise reduction Video signal processing circuit for noise reduction

1981-07-27

1983-07-12

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358167, H04N 521, H04N 9535

Patent

active

043933963

ABSTRACT:
In a noise suppression circuit for a video signal the number of elements required can be reduced when a separation circuit (3) for a high-frequency and a low-frequency component is used and the noise suppression is effected in the low-frequency component by means of a comb filter (19) which, in order to realize a still further savings in components, may comprise a delay circuit having a delay (103, 105, 107) which is switchable between a field period plus half a line period and a field period minus half a line period. The noise suppression circuit is therefore particularly suitable for use in television receivers.

REFERENCES:
patent: 4058836 (1977-11-01), Drewery
patent: 4223340 (1980-09-01), Bingham et al.
patent: 4291333 (1981-09-01), Warnock et al.
SMPTE Journal, vol. 87, No. 3, pp. 129-133, Mar. 1978.

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