| 摘要 |
R-Y and B-Y color difference components of an NTSC format input signal are demodulated to base-band and a burst flag is added to the R-Y signal. Both the B-Y signal which includes the original base-band burst component and the R-Y signal with the added burst flag are then remodulated on respective quadrature related PAL subcarriers. Alternate line phase reversal is achieved in one embodiment by switching the phase of the R-Y demodulator and inverting the burst flag every other line. In another embodiment the added flag is of constant polarity and the R-Y remodulator reference phase is switched. The remodulator outputs are combined with a luminance component of the NTSC input signal whereby a non-standard video output signal is produced having an NTSC luminance component and a PAL chrominance component to enable monitoring of the NTSC input signal on a PAL color television monitor operating at 525/60 line/field rate.
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