| 摘要 |
<p>PURPOSE:To convert an NTSC luminance signal Y and color difference signals B-Y, R-Y into an HDTV luminance signal YHD and color difference signals PB, PR to implement color reproduction with fidelity in which a difference with the High Vision is not recognized at the display of the NTSC color difference input video image in the signal processing circuit of the High Vision HDTV. CONSTITUTION:In order to use an HDTV signal processing circuit in common even at NTSC signal input, a matrix circuit 13 is realized, which is provided with inverters 2, 6 converting NTSC signals Y, B-Y, R-Y into HDTV signals YHD, PB, OR, coefficient devices 1, 3, 4, 5, 7, 8, 9 having a prescribed coefficient and adders 10, 11, 12.</p> |
