Demodulator for FM modulated video signals with pre-demodulation

Details Demodulator for FM modulated video signals with pre-demodulation Demodulator for FM modulated video signals with pre-demodulation

1991-02-11

1993-04-06

Groody, James J.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358327, 358 23, 329318, 329341, 375 12, H04N 521

Patent

active

052008355

ABSTRACT:
An FM demodulating apparatus suitable for use in a VTR or the like has a suppressing circuit for suppressing the upper and lower sideband components of an FM modulated video signal, an FM demodulation circuit for demodulating the output from the suppressing circuit and a recovering circuit connected to the output of the FM demodulation circuit for recovering the sideband components suppressed by the suppressing circuit, to thereby provide a favorable demodulation.

REFERENCES:
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patent: 5067026 (1991-11-01), Kaneko
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patent: 5088109 (1992-02-01), Schenk
IEEE Transactions on Consumer Electronics, vol. 34, No. 1, Feb. 1988, New York, N.Y., USA, pp. 78-83; Masami Itoga et al.: "Two Channel FM Recording for High-Definition Baseband Signals."
Patent Abstracts of Japan, vol. 11, No. 204 (E-520) (2651), 2 Jul. 1986 and JP-A-62 026 990 (Sony Corp.), 4 Feb. 1987.
Patent Abstracts of Japan, vol. 13, No. 482 (P-953), 2 Nov. 1989, and JP-A-1 192 062 (Mitsubishi Electric Corp.), 2 Aug. 1989.

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