H - Electricity – 04 – N
Patent
H - Electricity
04
N
350/44
H04N 9/04 (2006.01) H04N 11/04 (2006.01)
Patent
CA 1074436
Abstract of the Disclosure System for coding a composite color television signal including a luminance signal and carrier chrominance signals, said carrier chrominance signals being formed by modulating a subcarrier wave by chrominance information, the subcarrier frequency of said subcarrier wave being ? (m stands for an odd number) of a horizontal scanning frequency of said television signal, the phases of said subcarrier waves between two adjacent scanning periods being 180° away from each other, said coding system comprising: means for producing a sampling pulse of a repetition frequency lower than the Nyquest frequency of said television signal, means for sampling and coding said television signal in response to said sampling pulse; and means for controlling said sampling pulse in such manner that the sampling in said sampling means is achieved at a timing where said subcarrier waves stand at phases about 180° away from each other in each scanning line and at a timing where said subcarrier signals stand at phases about 90° away from each other between adjacent scanning periods.
246713
Iijima Yukihiko
Ishiguro Tatsuo
LandOfFree
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