Noise reduction apparatus for eliminating periodic noise

Details Noise reduction apparatus for eliminating periodic noise Noise reduction apparatus for eliminating periodic noise

1993-03-30

1995-03-21

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Recording apparatus

348607, H04N 5213

Patent

active

054001510

ABSTRACT:
When a first videotape as a reference is reproduced by a rotary head, the periodic noise output by the signal-processing section is extracted by the extracting means and stored in the memory section according to the reproduction timing. Then, when a second videotape on which a desired video signal has been recorded is reproduced, an electric signal reproduced from the second videotape by the rotary head is processed by the signal processing section, from the output of which,the periodic noise stored in the memory-section is then subtracted. As a result of this, the periodic noise is removed from the video signal reproduced for the second videotape.

REFERENCES:
patent: 4042959 (1977-08-01), Klein
patent: 4058836 (1977-11-01), Drewery et al.
patent: 4163253 (1978-07-01), Morio et al.
patent: 4637050 (1987-01-01), Schradin
patent: 4677487 (1987-06-01), Tomita et al.
patent: 4682251 (1987-07-01), Hino et al.
patent: 4807034 (1990-02-01), Takeuchi et al.
patent: 4841366 (1989-06-01), Katagiri et al.
patent: 4961113 (1990-10-01), Okada et al.

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