FM signal demodulator for video signal reproducing apparatus

Details FM signal demodulator for video signal reproducing apparatus FM signal demodulator for video signal reproducing apparatus

1989-01-27

1989-11-21

Chin, Tommy P.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, 358336, H04N 5213

Patent

active

048826189

ABSTRACT:
An FM demodulator for a video signal reproducing apparatus, which is responsive to an input FM luminance signal. The FM demodulator includes an FM demodulation circuit for changing the input FM signal to a base band luminance signal and a noise removing circuit for substantially removing noise from the base band luminance signal. The noise removing circuit is comprised of a clipping circuit for removing portions of the base band luminance signal carrying the noise and an amplitude expansion circuit for increasing the amplitude of the luminance signal at the location of the removed portions to a predetermined level.

REFERENCES:
patent: 4575760 (1986-03-01), Nakagaki
patent: 4577238 (1986-03-01), Watanabe
patent: 4597021 (1986-06-01), Yamamitsu
patent: 4622520 (1986-11-01), Kuroda
patent: 4682251 (1987-07-01), Hirota
patent: 4684976 (1987-08-01), Sugihara
patent: 4748498 (1988-05-01), Yamanishi
patent: 4768092 (1988-08-01), Ichinoi

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