FM video transmission system having coring and coring compensati

Details FM video transmission system having coring and coring compensati FM video transmission system having coring and coring compensati

1983-07-25

1985-05-28

Martin, John C.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358 36, 328167, H04N 521, H04B 110

Patent

active

045203962

ABSTRACT:
A video FM transmission system includes a transmitter coupled to a receiver by means of an FM transmission path subject to triangular noise effects. The receiver includes a coring circuit for reducing the noise and the transmitter includes a coring compensation circuit having a transfer function different from and not complementary to the transfer function of the coring circuit. The transfer functions are selected so as to effect greater coring of the triangular noise characteristic of the FM transmission system and lesser coring of the desired small-signal high-frequency components of the video signal thereby providing a desired signal-to-noise ratio enhancement of the video. In preferred embodiments of the invention the transfer functions of both the coring circuit and the coring compensation circuit are provided by programmed read only memories having different and non-complementary programs.

REFERENCES:
patent: 3715477 (1973-02-01), Olson et al.
patent: 4009334 (1977-02-01), Sypula
"Digital Techniques for Reducing Television Noise", by John P. Ross, SMPTE Journal, Mar. 1978, vol. 87, pp. 134-140.

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