1
John B George, William J Testin: Tuning mode arrangement useful for restricting channel selection to certain channels. RCA Corporation, E M Whitacre, P J Rasmussen, P M Emanuel, October 19, 1982: US04355415 (270 worldwide citation)

A television tuning system includes a memory for storing tuning information with first and second groups of memory locations for storing different tuning information for the same group of predetermined channels. A mode switch, in a first mode, allows memory locations in the first group to be address ...


2
Christopher P Kocher, Abe Abramovich: Television remote control system for selectively controlling external apparatus through the AC power line. RCA Corporation, E M Whitacre, P J Rasmussen, A J Jacobson, May 31, 1983: US04386436 (217 worldwide citation)

A remote control system utilizes a portion of television receiver system to control an external appliance through the AC power supply line. The user enters an appliance control command into the keyboard of the television remote control unit. Inside the television receiver, the appliance control comm ...


3
Stanley P Knight: Television signal converting apparatus providing an on-screen tuning display. RCA Corporation, E M Whitacre, P J Rasmussen, C A Berard Jr, September 20, 1983: US04405946 (181 worldwide citation)

In a signal converting apparatus such as one including demodulation and remodulation apparatus for converting RF cable carriers to RF carriers having frequencies corresponding to broadcast frequencies, a character generator is coupled to the tuning selector to generate characters representative of t ...


4
Charles R Thompson: Differential PCM video transmission system employing horizontally offset five pixel groups and delta signals having plural non-linear encoding functions. RCA Corporation, P J Rasmussen, P M Emanuel, R G Coalter, April 28, 1987: US04661862 (120 worldwide citation)

A wide-aspect-ratio HDTV signal having 1600 luminance pixels/32 .mu.S line and 980 lines/frame is data reduced by deleting odd pixels of each line of TV field #1 and even pixels of each line of TV field #2 to produce 800 pixels per line, and is further data compressed by a form of differential-pulse ...


5
Jack S Fuhrer: Plural operating mode ambient light responsive television picture control. RCA Corporation, E M Whitacre P J Rasmussen R H Kurdyla, May 29, 1984: US04451849 (114 worldwide citation)

The contrast of an image reproduced by a television receiver is manually adjustable by means of a picture control potentiometer, and automatically adjustable by means of an ambient light responsive circuit. Automatic picture control is accomplished selectively, independent of the manual control sett ...


6
Juri Tults: Arrangement for both channel swapping and favorite channel features. RCA Corporation, E M Whitacre, P J Rasmussen, P M Emanuel, January 4, 1983: US04367559 (102 worldwide citation)

The channel selection apparatus of a tuning system includes a present channel number register, a temporary register, a saved channel number register and a control unit for selectively controlling the three registers to (a) interchange the contents of the present and saved channel number registers wh ...


7
Chung H Lu: Generalized chrominance signal demodulator for a sampled data television signal processing system. RCA Licensing Corporation, P J Rasmussen, E P Herrmann, K N Nigon, May 17, 1988: US04745463 (98 worldwide citation)

In an NTSC digital television receiver, the composite video signal is digitized with a sampling frequency of 32/13 times the color subcarrier frequency, f.sub.c. The chrominance signal component of this video signal is demodulated using a pair of finite impulse responsive filters having programmable ...


8
Russell T Fling, Saiprasad V Naimpally: Apparatus for symmetrically truncating twos complement binary signals as for use with interleaved quadrature signals. RCA Corporation, E M Whitacre, P J Rasmussen, E P Herrmann, May 13, 1986: US04589084 (96 worldwide citation)

Symmetrical truncation of two's complement binary numbers is performed by simply discarding the LSB's of positive values and by adding "one" to the truncated negative value when any one of the discarded LSB's is a logical "one" value. Apparatus to perform an N bit truncation includes an incrementer, ...


9
Todd J Christopher: Sampled data subsampling apparatus. Thomson Consumer Electronics, E M Whitacre, P J Rasmussen, E P Herrmann, April 4, 1989: US04819252 (95 worldwide citation)

An antialias filtering and subsampling system incorporates a compound accumulator including three cascade connected accumulator circuits conditioned to integrate and dump the integrated values of n input samples. The integrated values from the three integrators are scaled, delayed and combined to pr ...


10
Merle V Hoover: Complementary symmetry FET frequency converter circuits. RCA Corporation, E M Whitacre, P J Rasmussen, P M Emanuel, June 8, 1982: US04334324 (92 worldwide citation)

A frequency converter uses first and second complementary symmetry FET's to perform respective oscillator and mixer functions. The first and second FET's are arranged with respective conduction channels connected in series. The oscillator function is performed by the first FET via feedback provided ...



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