| 摘要 |
<p>Color difference signals of demodulated video are vertically filtered to be converted into 4:2:2 signals before subjected to OSD synthesis, after which those signals are once again vertically filtered as a sort of scaling to obtain the output resolution. As filtering is carried out in two stages, the frequency characteristic deteriorates. A video processor superimposes an OSD video signal on a 4:2:0 format video signal, and includes: a converting section for converting the OSD video signal into YUV signals; an OSD luminance signal scaling section for performing scaling on an OSD luminance signal included in the YUV signals; a luminance signal synthesizing section for synthesizing the scaled OSD luminance signal and the luminance signal of the 4:2:0 format video signal; an OSD color difference signal scaling section for performing scaling on OSD color difference signals included in the YUV signals; and a color difference signal synthesizing section for synthesizing the scaled OSD color difference signals and the color difference components of the 4:2:0 format video signal.</p> |
