发明授权
US3952326A Dropout compensator for a trisequential color video playback system 失效
用于三色彩色视频播放系统的压差补偿器

Dropout compensator for a trisequential color video playback system
摘要:
The invention relates to a dropout compensator for a trisequential color video playback system which compensates for dropouts in color video signals with a high degree of accuracy. Only the color information including the Y low portion of the luminance signal is delayed for a period of substantially one line of video information after separation of the color information from the Y high portion of the luminance signal and after FM demodulation of the color information signals. In addition to the two conventional delay means, connected in series, present in a trisequential system and necessary for converting time-sequential occuring color signals into signals occurring at the same time, there is provided a third delay means for the compensation of dropouts. The output signal of the third delay means is switched by a switch means to the entrance of the first two delay means, the switch means being controlled by a detector means detecting a signal level decrease in the envelope of the FM signal when a dropout occurs.
公开/授权文献
信息查询
0/0