| 摘要 |
A color system discriminator is provided with a frequency detector (4, 14), a vertical-synchronizing frequency detector (9), a plurality of color demodulators (11, 12, 13), a demodulating switch (10), and a controller (6). The type of the color system of a received signal is determined with reference not only to the burst lock frequency indicated in the tuner detection signal and the phase of the R-Y color difference signal of the image signal, but also to the frequency of the sound carrier signal and the vertical synchronizing frequency. <IMAGE> |
