| 摘要 |
<p>PURPOSE:To simplify hardware constitution by band-separating a color video signal into a low-band signal and a high-band signal, transmitting two kinds of signals obtained by-color-demodulation of the high-band signal based on the color subcarrier frequency of a carrying color signal and the low-band signal as a digital signal, respectively. CONSTITUTION:The color video signal is band-separated into the low-band signal containing the low-band components of a luminance signal and the high- band signal containing at least one part of the high-band components of the luminance signal and the carrying color signal, and two kinds of signals obtained by color-demodulating the high-band signal based on the color subcarrier frequency of the carrying color signal and the low-band signal are transmitted as the digital signals, respectively. Thus, since the band separation can be realized only by a one-dimensional film without using a space filter, a time space filter, etc., circuit constitution can be simplified. Since the low-band signal occupies most of the luminance signal components and the high-band signal occupies most of the carrying signal components, a correlation between adjoining picture elements necessary for data compression is large, and the data compression can be executed without deteriorating an image.</p> |
