Image signal compressor

Details Image signal compressor Image signal compressor

H - Electricity

04

N

350/41

H04N 9/64 (2006.01) A45D 40/00 (2006.01) H04N 5/20 (2006.01) H04N 9/68 (2006.01)

Patent

CA 1257685

ABSTRACT OF THE DISCLOSURE The image signal compressor comprises, in particular, a controller for adjusting the compression start potential in such a way as to decrease it with increasing highest peak voltage level of three chrominance signals to be compressed, in addition to three first resistors, three diodes and three second resistors. Therefore, even if one of three chrominance signals rises excessively high, it is possible to always compress the chrominance signals below a predetermined level without limitation by limiter circuits, thus preventing the chrominance signal having an excessively high peak voltage level from being regenerated in white on a cathode-ray tube. The signal compressor is applicable to a monochrome image pickup tube or solid-state image pickup elements as well as a color image pickup tube or color solid-state image pickup elements.

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