| 摘要 |
In order to provide a copy protection signal for an analog video signal so as to prohibit recording/reproducing of such video signal by a VCR while permitting the video signal containing the copy protection signal to be displayed, without disturbance, by a television monitor; a macro block of the copy protection signal is constituted by lines of the color video signal containing a color burst signal whose phase is partially inverted and which are interspersed, at intervals, with at least one line containing a normal phase color burst signal. Further, one or more of the lines in the macro block of the copy protection signal which contains the normal phase color burst signal has the latter constituted by pulses with amplitudes greater than those of the normal color burst signal so that color densities will not be disturbed when the video signal is displayed in a television monitor.
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