Dither quantized signalling for color television

Details Dither quantized signalling for color television Dither quantized signalling for color television

1981-01-13

1984-07-17

Martin, John C.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358 13, H04N 932, H04N 9493

Patent

active

044609248

ABSTRACT:
One or more of the video components of prior art are quantized coarsely before being sent to a receiver. To prevent perceptible loss of picture information and to minimize visible artifacts, suitable ordered dither is added before a component is quantized. The transmitted signal is preferably also sampled at the transmitter and resampled and requantized in the receiver for combatting noise and distortion. Some forms of the invention are compatible with prior art receivers. Other forms provide compressed digital signalling and coarsely quantized pulse-amplitude modulation.

REFERENCES:
patent: 3382317 (1968-05-01), Sandler
patent: 3739082 (1973-07-01), Lippel
patent: 3858240 (1974-12-01), Golding
patent: 4015286 (1977-03-01), Russell
patent: 4107729 (1978-08-01), Otobe et al.
patent: 4275411 (1981-06-01), Lippel
Patchett, Color Television with Particular Reference to the PAL System, 1968, Norman Price Publishers, pp. 115, 116.

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