Video pattern noise processor

Details Video pattern noise processor Video pattern noise processor

1984-08-21

1986-08-12

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

250578, 358167, 357 24, H04N 314

Patent

active

046059695

ABSTRACT:
Low-frequency noise in the video output of a charge-injection-device imager is cancelled by delaying the low-frequency components of video plus noise for one horizontal interval and subtracting therefrom the undelayed noise from corresponding cells of the same row of the imaging matrix. High frequency noise is eliminated in a separate channel by low-level clipping of the high-frequency component of the video signal. The high-frequency video component is delayed for one horizontal interval to align it with the low-frequency video component and the two components are summed to reconstruct the full video signal from which both high-frequency and low frequency noise is absent.

REFERENCES:
patent: 4079422 (1978-03-01), Anagnostopoulos
patent: 4079423 (1978-03-01), Diehl
patent: 4158209 (1979-06-01), Levine
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patent: 4316221 (1982-02-01), Swab
patent: 4387402 (1983-06-01), Lewis
patent: 4434441 (1984-02-01), Ishizaki et al.
patent: 4472744 (1984-09-01), Inoue et al.
patent: 4495523 (1985-01-01), Ozawa
patent: 4511804 (1985-04-01), Ozawa

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