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公开(公告)号：US4400742A
公开(公告)日：1983-08-23
申请号：US154454
申请日：1980-05-29
CPC分类号： H04N9/793
摘要： A magnetic recording and reproducing apparatus, for recording and reproducing the color television signal including VIR signal, of the type having a comb filter which is inserted in the chrominance signal system and includes a delay line for causing a delay equal to one horizontal line scanning period. In this apparatus the VIR signal has no line correlation so that the output of the comb filter becomes a VIR signal the amplitude of which is reduced by 6dB and that the amplitude and/or phase of the chrominance components of VIR signal are caused to vary over a wide range due to the effects of VIT signal. In order that the stable and correct color images may be reproduced even by a color television receiver of the type in which the amplitude and phase of the chrominance components of VIR signal are detected so as to automatically adjust the color saturation and hue, the amplitude of the chrominance components of VIR signal is detected and corrected in a recording system of a magnetic recording and reproducing apparatus; the burst signal and the chrominance components of VIR signal are compared in phase so as to correct the phase of the carrier color signal with the difference signal before the carrier color signal is recorded; and in the playback mode the chrominance components of VIP signal of the carrier color signal free from time axis distortions are replaced with the stable oscillator output.
摘要翻译： 一种用于记录和再现包括VIR信号的彩色电视信号的磁记录和再现装置，该彩色电视信号具有插入色度信号系统中的梳状滤波器，并且包括用于引起等于一个水平行扫描周期的延迟的延迟线 。 在该装置中，VIR信号没有线相关，使得梳状滤波器的输出变为VIR信号，其振幅降低6dB，并且使得VIR信号的色度分量的幅度和/或相位发生变化 由于VIT信号的影响，范围很广。 为了即使通过检测到VIR信号的色度分量的幅度和相位的类型的彩色电视接收机也可以再现稳定和正确的彩色图像，以便自动调整色饱和度和色调， 在磁记录和再现装置的记录系统中检测和校正VIR信号的色度分量; 比较VIR信号的脉冲串信号和色度分量的相位，以便在记录载波颜色信号之前用差分信号校正载波颜色信号的相位; 并且在回放模式中，没有时间轴失真的载波颜色信号的VIP信号的色度分量被稳定的振荡器输出替代。
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