Phase difference compensation between separately recorded lumina

Details Phase difference compensation between separately recorded lumina Phase difference compensation between separately recorded lumina

1981-06-10

1983-08-16

Psitos, Aristotelis M.

Facsimile and static presentation processing

Facsimile

Recording apparatus

358330, H04N 944, H04N 9491

Patent

active

043994725

ABSTRACT:
Luminance and chrominance signals, which are interleaved with respective synchronization signals, are recorded through the use of two video transducer heads alternately in skewed separate tracks of a recording tape. Upon reproduction, the timing signals are separated from the luminance and chrominance signals and compared in phase between them to detect the phase difference between the luminance and chrominance signals. A variable delay line is provided to introduce a variable delay interval as a function of the detected phase difference to the one of the signals which is advanced in phase relative to the other. The time axis deviation of the video signal from a standard phase is also detected by a comparison between the time base, or horizontal sync pulse, and a reference time base to introduce a delay time to both the luminance and chrominance signals.

REFERENCES:
patent: 3409736 (1968-11-01), Hurst et al.
patent: 3534169 (1970-10-01), Bockwoldt
patent: 3560634 (1971-02-01), Diller et al.
patent: 4005473 (1977-01-01), Hjortzberg
patent: 4052740 (1977-10-01), Coleman, Jr.
patent: 4074307 (1978-02-01), Dischert et al.
patent: 4291344 (1981-09-01), Kimura

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