Image signal processing device with conversion of sample frequen

Details Image signal processing device with conversion of sample frequen Image signal processing device with conversion of sample frequen

1992-07-20

1995-11-21

Groody, James J.

Television

Format conversion

Specified chrominance processing

348504, H04N 1122

Patent

active

054692180

ABSTRACT:
An image signal processing device according to this invention is a device for processing an image signal. The device is arranged to input digital data corresponding to two kinds of color-difference signals in synchronism with a clock signal corresponding to a data rate of the digital data, reconstruct the inputted digital data corresponding to the two kinds of color-difference signals into digital data synchronized with a clock signal having a frequency which is an integer multiple of a color subcarrier frequency, and form digital data corresponding to a chrominance signal by using the reconstructed digital data corresponding to the two kinds of color-difference signals. Accordingly, it is possible to stably encode the two kinds of color-difference signals into the carrier chrominance signal by means of a simple construction without degrading the color-difference signals.

REFERENCES:
patent: 4117509 (1978-09-01), de Boer
patent: 5093714 (1992-03-01), Hashimoto
patent: 5245415 (1993-09-01), Mimura

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