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
- 专利标题: Dropout compensator for a trisequential color video playback system
- 专利标题(中): 用于三色彩色视频播放系统的压差补偿器
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申请号: US507433申请日: 1974-09-19
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公开(公告)号: US3952326A公开(公告)日: 1976-04-20
- 发明人: Gerhard Rotter
- 申请人: Gerhard Rotter
- 申请人地址: DT Ludwigshafen (Rhine)
- 专利权人: BASF Aktiengesellschaft
- 当前专利权人: BASF Aktiengesellschaft
- 当前专利权人地址: DT Ludwigshafen (Rhine)
- 主分类号: G11B20/06
- IPC分类号: G11B20/06 ; H04N9/88 ; H04N11/08 ; H04N11/24 ; H04N5/76
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.
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