专利汇可以提供Chroma signal processor for pal system picture recorder and reproducer专利检索,专利查询,专利分析的服务。并且PURPOSE:To obtain a PAL system picture recorder and reproducer in which no hue is changed even with repeated dubbing, by comparing the phase at each 2H and eliminating the detected ripple, since the burst signal of the PAL system has arranged phase at each 2H. CONSTITUTION:A burst gate pulse formed by delaying a horizontal synchronizing pulse at a delay circuit 18 is blocked at each other 1H at an AND gate circuit 21 and applied to a burst gate circuit 6 once per 2H. Since the phase of the burst signal is fixed to +45 deg. or -45 deg. to (R-Y) axis at each 2H, when the phase of the output signal of an oscillator 8 has the phase difference of 90 deg. with either this +45 deg. or -45 deg., the system is stable. A signal having the phase difference of 90 deg. is inputted to a phase comparison circuit 7 at all times, no ripple is produced. Then, a VOC10 is oscillated at a prescribed frequency at all times and no hue change is caused.,下面是Chroma signal processor for pal system picture recorder and reproducer专利的具体信息内容。
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