| 摘要 |
A sampled data filter for separating chrominance signal from digitized composite video sampled at a 4fsc rate produces filtered sampled data chrominance signal at one half the input sample rate. The input video signal occurring as a 4fsc+I, +Q, -I, -Q sample sequence is decimated in the filter so that only the filtered replicas of the +I and +Q samples are computed. This effectively doubles the computational time permitted the filter circuitry without substantially compromising signal content. |
