| 摘要 |
<p>RCA 80577/80577A of the Invention A digital luminance processing circuit includes a first cosine filter in cascade connection with the parallel combination of a second low pass filter and a third filter which attenuates high frequencies less than low frequencies. The third filter includes a variable scaling device. The output of the second filter is connected to one input of a combining means, and the output of the third filter is coupled to a second input of the combining means. The output of the combining means is the output port of the processing circuit.</p> |
