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公开(公告)号：WO1982003518A1
公开(公告)日：1982-10-14
申请号：PCT/US1982000420
申请日：1982-04-05
Applicant: RCA CORP
Inventor： RCA CORP , ROBERT ANDREW WARGO
IPC: H04N05/14
CPC classification number: H04N5/21
Abstract: Apparatus which is responsive to a video signal for producing a position-modulated pulse train which is representative of the occurrence of transitions of the video signal. A transversal filter (60) is responsive to the video signal and produces a differentiated replica of the video signal over a given band of frequencies. The output of the transversal filter contains transitional information of the video signal occupying a range of frequencies which is to be analyzed. Information representing transitions of positive, negative, or both polarities is then compared to a given threshold value, generated in threshold generator (82). Signal transitions exceeding the threshold are converted to pulses, thereby producing a train of pulses representing significant transitions of a desired polarity or polarities. The times of occurrence of the pulses are then analyzed to generate a control signal for controlling a given characteristic of the video signal during processing.
Abstract translation: 响应于视频信号以产生位置调制脉冲串的装置，其表示视频信号的转变的发生。 横向滤波器（60）响应于视频信号并且在给定的频带上产生视频信号的差分副本。 横向滤波器的输出包含占据要分析的频率范围的视频信号的过渡信息。 然后，将表示正极性，负极性或两极性的转换的信息与在阈值发生器（82）中生成的给定阈值进行比较。 超过阈值的信号转换被转换为脉冲，从而产生一系列脉冲，表示所需极性或极性的显着转变。 然后分析脉冲的发生次数以产生用于在处理期间控制视频信号的给定特性的控制信号。
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公开(公告)号：EP0075597A4
公开(公告)日：1986-09-04
申请号：EP82901472
申请日：1982-04-05
Applicant: RCA CORP
Inventor： ROBERT ANDREW WARGO
CPC classification number: H04N5/21
Abstract: Apparatus which is responsive to a video signal for producing a position-modulated pulse train which is representative of the occurrence of transitions of the video signal. A transversal filter (60) is responsive to the video signal and produces a differentiated replica of the video signal over a given band of frequencies. The output of the transversal filter contains transitional information of the video signal occupying a range of frequencies which is to be analyzed. Information representing transitions of positive, negative, or both polarities is then compared to a given threshold value, generated in threshold generator (82). Signal transitions exceeding the threshold are converted to pulses, thereby producing a train of pulses representing significant transitions of a desired polarity or polarities. The times of occurrence of the pulses are then analyzed to generate a control signal for controlling a given characteristic of the video signal during processing.
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