| 摘要 |
PROBLEM TO BE SOLVED: To solve the following problem: color difference signals of demodulated video are vertically filtered to be converted into 4:2:2 format 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, and since filtering is thus carried out in two times, the frequency characteristic deteriorates. SOLUTION: A video processor superimposes an OSD video signal on a 4:2:0 format video signal. The video processor includes: a converting part for converting the OSD video signal into YUV signals; an OSD luminance signal scaling part for performing scaling on an OSD luminance signal included in the YUV signals; a luminance signal synthesizing part 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 part for performing scaling on OSD color difference signals included in the YUV signals; and a color difference signal synthesizing part for synthesizing the scaled OSD color difference signals and the color difference components of the 4:2:0 format video signal. COPYRIGHT: (C)2011,JPO&INPIT
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