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Pritchard Dalton Harold: Color information translating systems. RCA Corporation March 18, 1975: US3872498 (41 worldwide citation)

A color encoding format is disclosed wherein a chrominance signal in the form of a modulated subcarrier is buried in the midband of a wider band luminance signal. Comb filtering of the luminance signal midband prepares 'troughs' in the luminance signal frequency spectrum. The chrominance signal is c ...


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Pritchard Dalton Harold, Schroeder Alfred Christian: High voltage regulator. RCA Corporation May 20, 1975: US3885198 (7 worldwide citation)

In a horizontal deflection and high voltage generating circuit in a television receiver, the high voltage is regulated to remain substantially constant with variations in picture tube beam current variation and receiver direct current power supply variation. A high voltage variation representative s ...


3
Brandinger Jay Jerome, Pritchard Dalton Harold, Fredendall Gordon Lyle, Schroeder Alfred Christian: Color signal producing system utilizing spatial color encoding and comb filtering. RCA Corporation August 6, 1974: US3828121 (6 worldwide citation)

Colored light from a scene is spatially encoded onto a photosensitive surface by a striped spatial color encoding filter assembly including first and second superimposed encoding gratings having equal pitch encoding stripes disposed such that the stripes of the respective gratings are at substantial ...


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Pritchard Dalton Harold: Television apparatus with vertical detail enhancement.. RCA December 11, 1985: EP0164203-A2 (6 worldwide citation)

A television receiver displays the picture information of an interlaced signal, such as a baseband NTSC signal, in a non-interlaced scanning format. The NTSC signal (130) is comb filtered in a line comb filter (15) to extract a luminance representative component signal (Yi). When no motion occurs in ...


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Wargo Robert Andrew, Harwood Leopold Albert, Pritchard Dalton Harold, Chartier Michael: A motion adaptive television signal processing system. RCA June 8, 1988: GB2198311-A (5 worldwide citation)

A motion adaptive television signal processing system is disclosed. An image change estimator estimates the image change over an image time interval. A television signal processor adaptively processes the signal in response to a control signal. A control signal generator is coupled between the image ...


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Pritchard Dalton Harold, Bunting Richard Michael, Acampora Alfonse: Comb filtering tv signals. RCA June 6, 1984: GB2130840-A (4 worldwide citation)

A frame-to-frame comb filter for separating chrominance (C) Fig. 2(d) and luminance (Y) (c) signals from composite video signals (a), (b) produces objectionable distortions around the edges of moving objects. The distortions are substantially removed by low pass filtering (27) the combed chrominance ...


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Pritchard Dalton Harold, Sepp Walter Edgar: Progressive scan television system. RCA March 27, 1985: GB2145603-A (3 worldwide citation)

A color television signal representing an image scanned in interlaced format is displayed by a display means (51) in progressive scan format. The progressively scanned image comprises "real" lines and further lines preferably interpolated by an interpolator (5, 7, 9) from the real lines. Vertical de ...


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Pritchard Dalton Harold, Sepp Walter Edgar: Progressive scan television system. RCA March 1, 1985: FR2551292-A1 (1 worldwide citation)

A color television signal representing an image scanned in interlaced format is displayed by a display means (51) in progressive scan format. The progressively scanned image comprises "real" lines and further lines preferably interpolated by an interpolator (5, 7, 9) from the real lines. Vertical de ...


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