Color-television receiver with at least one digital integrated c

Details Color-television receiver with at least one digital integrated c Color-television receiver with at least one digital integrated c

1981-10-14

1983-12-06

Chin, Tommy P.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, 358 24, 358 26, H04N 9535, H04N 949

Patent

active

044196881

ABSTRACT:
The color television receiver includes a square-wave clock generator used as a chrominance subcarrier oscillator generating at least four clock signals, the first of which has a frequency four times the chrominance subcarrier frequency, and the second to fourth of which have a frequency equal to the chrominance subcarrier frequency, the first and second clock signals having a mark/space ratio of 1:1; a stage providing a digital chrominance signal, a first digital circuit having as one input signal the digital chrominance signal, and as another input signal the digital chroma control signal to provide a digital amplitude control of the received chrominance subcarrier wave; and a second digital circuit to provide digital PAL identification and color killer action and, if necessary, digital noise-dependent color killer action.

REFERENCES:
patent: 3548084 (1970-12-01), Kroner
patent: 3772461 (1973-11-01), Horaguchi
patent: 3794754 (1974-02-01), Haferl
patent: 4021842 (1977-05-01), Campioni
patent: 4148058 (1979-04-01), Harwood
patent: 4240102 (1980-12-01), Groeneweg
patent: 4270139 (1981-05-01), Flamm
patent: 4300155 (1981-11-01), Sagishima
patent: 4352123 (1982-09-01), Flamm

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