Robert E Libbey

US Patent:

42186994, Aug 19, 1980

Filed:

Mar 2, 1979

Appl. No.:

6/017040

Inventors:

Robert A. Dischert - Burlington NJ
Robert L. Libbey - Cherry Hill NJ

Assignee:

RCA Corporation - New York NY

International Classification:

H04N 9535

US Classification:

358 29

Abstract:

The individual red, green, and blue video white levels from a color television camera are maintained constant when the individual red, green, and blue black camera control levels are adjusted by the master black camera control by additively summing a first percentage of the selected master black level to the individual red, green, and blue black levels to form the final individual black levels and by subtracting a second percentage of the selected master black level from the individual red, green, and blue white levels selected by the individual red, green, and blue white level camera controls.

US Patent:

45203962, May 28, 1985

Filed:

Jul 25, 1983

Appl. No.:

6/517028

Inventors:

Robert A. Dischert - Burlington NJ
Robert L. Libbey - Cherry Hill NJ

Assignee:

RCA Corporation - Princeton NJ

International Classification:

H04N 521
H04B 110

US Classification:

358167

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.