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    • 4. 发明授权
    • Video signal processing apparatus
    • 视频信号处理装置
    • US06219105B1
    • 2001-04-17
    • US09092877
    • 1998-06-08
    • Takao KashiroShozo FujiiKatuji Uro
    • Takao KashiroShozo FujiiKatuji Uro
    • H04N506
    • H04N9/641H04N5/126H04N9/8722H04N9/89
    • A video signal processing apparatus comprising an oscillating unit for outputting a signal of a stable frequency, a counting unit for counting the period of a cycle of a signal supplied from the outside based on the signal output by the oscillating unit, a clock number calculating unit for calculating the number of clocks in a line based on a result of counting by the counting unit, a comparing unit for comparing the number of clocks calculated by the clock number calculating unit with a threshold to decide which is larger, a switching unit for deciding the number of clocks in the next operation by switching to the number of clocks calculated by the clock number calculating unit if the calculated number of clocks is larger than the threshold, or deciding the number of clocks in the next operation by holding the number of clocks in a line in the current operation as it is, and a synchronizing signal generating unit for, based on the number of clocks in operation decided by the switching unit and the signal output by the oscillating unit, generating a synchronizing signal for a video signal, thereby preventing a shake of a frame signal supplied from the outside from directly affecting a synchronizing signal to be generated for a video signal so that a visually adverse shake of image on a TV screen can be suppressed.
    • 一种视频信号处理装置,包括用于输出稳定频率的信号的振荡单元,用于根据由振荡单元输出的信号对从外部提供的信号的周期的周期进行计数的计数单元,时钟数计算单元 用于基于计数单元的计数结果来计算一行中的时钟数;比较单元,用于将由时钟数计算单元计算的时钟数与阈值进行比较以决定哪个较大;一个切换单元,用于决定 如果计算出的时钟数量大于阈值,则切换到由时钟数计算单元计算出的时钟数的下一个操作中的时钟数,或者通过保持时钟数来确定下一个操作中的时钟数 在当前操作中一行直行;以及同步信号生成单元,用于基于由切换决定的操作中的时钟数 单元和由振荡单元输出的信号,产生用于视频信号的同步信号,从而防止从外部提供的帧信号的抖动直接影响为视频信号产生的同步信号,使得视觉上不利的抖动 可以抑制电视屏幕上的图像。