Electronic time base error correction methods and arrangements

Details Electronic time base error correction methods and arrangements Electronic time base error correction methods and arrangements

1976-10-01

1978-05-16

Richardson, Robert L.

Facsimile and static presentation processing

Static presentation processing

Attribute control

H04N 5795

Patent

active

040902153

ABSTRACT:
An electronic time base error correction technique in which the color video signal is recorded so that in playback in at least one channel sync information is provided along with the luminance information and the color burst information along with the chrominance information. Feedback loops are provided to derive from the sync information coarse-correction of the video signal and derive from the burst information fine-correction of the video signal. The color burst extends over the entire blanking interval.
Three different approaches are specifically disclosed: in the first, coarse- and fine-correction are carried out in two tandem connected stages, respectively. In the second, coarse- and fine-correction are accomplished in the same stage by means of a bi-level phase comparator. The third approach is a modification of the second approach, in which the first and second techniques have been combined.

REFERENCES:
patent: 3637936 (1972-01-01), Krause
patent: 3890558 (1975-06-01), Guisinger et al.
patent: 3921202 (1975-11-01), Dann et al.

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