Digital video signal processing system using asynchronous a-to-d

Details Digital video signal processing system using asynchronous a-to-d Digital video signal processing system using asynchronous a-to-d

1983-12-30

1985-12-10

Masinick, Michael A.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 21R, 358320, H04N 950

Patent

active

045583480

ABSTRACT:
A digital TV receiver having an analog-to-digital converter which generates digital representations of the analog signal asynchronously relative to the color burst reference, includes open loop circuitry for correcting the values of the chrominance component to comport with chrominance samples having a fixed phase relationship with burst. During the burst interval the angle of the chrominance phasor relative to the asynchronous sampling instants is compared with a fixed angular reference value to generate a correction factor for the respective line of video signal. The correction factor is thereafter combined with the chrominance samples to generate new chrominance samples having a desired phase relationship with the phase of the burst reference signal.

REFERENCES:
patent: 4219838 (1980-08-01), Rossi
patent: 4270139 (1981-05-01), Flamm et al.
patent: 4352123 (1982-09-01), Flamm
patent: 4404583 (1983-09-01), Tatami
patent: 4412181 (1983-10-01), Marguinaud et al.
patent: 4475220 (1984-10-01), Mattei
patent: 4514754 (1985-04-01), Nillesen
patent: 4523221 (1985-06-01), Chin
SMPTE, "Digital Video", vol. 3, pp. 89-98, Jun. 1980.

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