Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1974-08-29
1976-04-27
Libman, George H.
Facsimile and static presentation processing
Static presentation processing
Attribute control
H04N 902
Patent
active
039538826
ABSTRACT:
In a system for cancelling time axis variations introduced into a frequency converted chrominance signal converted into a lower frequency range in the recording and reproduction of a color television signal with a small-size video tape recorder, in which system the cancellation of the time axis variations is effected by using a continuous reference signal obtained through an APC heterodyne system, the center frequency of oscillation of an APC oscillator is made n/m times the subcarrier frequency f.sub.s of the lower frequency converted chrominance signal (m and n being integers and n>m), and the reproduced frequency converted chrominance signal is heterodyned with a signal obtained by heterodyning a continuous signal obtained by dividing the frequency of the output signal of the oscillator by n/m in the presence of a steady reference signal at the same frequency as the standard color sub-carrier frequency to thereby obtain the cancellation of the time axis variations.
REFERENCES:
patent: 3704341 (1972-11-01), Fujita
patent: 3820154 (1974-06-01), Faroudja et al.
patent: 3845497 (1974-10-01), Inoue et al.
Arimura Ichiro
Sekimoto Kunio
Taniguchi Hiroshi
Libman George H.
Matsushita Electric Industrial Company Ltd.
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