Non-linear aperture correction circuit having a signal bypass ar

Details Non-linear aperture correction circuit having a signal bypass ar Non-linear aperture correction circuit having a signal bypass ar

1980-02-19

1982-02-09

Cook, Daryl W.

Facsimile and static presentation processing

Static presentation processing

Attribute control

3581285, 360 36, H04N 578, H04N 576

Patent

active

043152775

ABSTRACT:
In a video disc playback system non-linear intermodulation distortions are effected during playback by the pick-up stylus. These distortions cause disturbing visual beats in the reproduced images. A first signal path at the output of the pick-up circuitry transfers the main video signal with negligible phase shift over a given band of frequencies. A second signal path which parallels the first path effects a modulation of the video signals by the interferring signals (i.e., sound signals). The signals from the first and second paths are combined to effect a substantial removal of the interfering intermodulation products.

REFERENCES:
patent: 3879748 (1975-04-01), DeBoer
patent: 3934263 (1976-01-01), Palmer
patent: 3984867 (1976-10-01), Harnandez
patent: 4124208 (1979-02-01), Oprandi et al.
patent: 4150395 (1979-04-01), Pritchard
patent: 4166251 (1979-08-01), Ishigaki et al.

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