Facsimile and static presentation processing – Facsimile – Recording apparatus
Patent
1989-12-14
1992-08-25
Envall, Jr., Roy N.
Facsimile and static presentation processing
Facsimile
Recording apparatus
358327, H04N 981, H04N 989
Patent
active
051423766
ABSTRACT:
An image signal recording and reproducing system is arranged to record on a recording medium an image signal composed of a chrominance signal and a luminance signal which includes a synchronizing signal in the following manner: The luminance signal is modulated into a first frequency band. The chrominance signal is modulated into a second frequency band. A pilot signal is formed in such a way as to have a frequency between the first and a second frequency bands and to be phase-locked to the syncrhonizing signal included in the luminance signal. A signal obtained by frequency-multiplexing the modulated luminance signal, the modulated chrominance signal and the pilot signal is recorded on the recording medium. In reproducing the recorded signal, time-base variations occurred during the process of reproduction in the reproduced luminance and chrominance signals are corrected by using the reproduced pilot signals. The arrangement prevents the deterioration of the image signal to enable the system to reproduce an image with a high picture quality.
REFERENCES:
patent: 4672470 (1987-06-01), Morimoto et al.
patent: 4823196 (1989-04-01), Goodard
Canon Kabushiki Kaisha
Envall Jr. Roy N.
Nguyen Huy
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