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    • 8. 发明授权
    • Motion detection circuit and a noise suppressing circuit including the same
    • 运动检测电路和包括该运动检测电路的噪声抑制电路
    • US06567468B1
    • 2003-05-20
    • US09394684
    • 1999-09-13
    • Noriyoshi KatoYukio FujitaMisa Kasahara
    • Noriyoshi KatoYukio FujitaMisa Kasahara
    • H04N712
    • G06T7/254
    • In a motion detection circuit, a difference signal between the video and one-frame delayed video signals is generated. An Edge signal is generated from the video and delayed video signals. Motion in a target pixel is judged from the interframe difference signal according to the edge signal. A motion judging circuit further includes an LPF and a selector for supplying an output of the LPF or the difference signal. The motion judging circuit may further includes: a peripheral pixel comparing circuit (may be bypassed) for detecting motion at the pixel by checking polarities of the difference signal at an area around the target pixel; a majority detection circuit (may be bypassed) for detecting a majority of the results of the polarity deviation detection circuit to judge the motion with deviation to a side of stopping; and a polarity deviation detecting circuit for judging the motion as moving in the presence of agreement of the polarities of all pixels at any of peripheral areas around the target pixel. The size of the peripheral areas are controlled. The polarity deviation circuit may compensate the result of the majority detection circuit. Width of the edge signal is controlled. A noise suppression apparatus including a motion detection circuit mentioned above is also disclosed.
    • 在运动检测电路中,产生视频和一帧延迟的视频信号之间的差分信号。 从视频和延迟的视频信号产生边沿信号。 根据边缘信号从帧间差分信号判断目标像素中的运动。 运动判定电路还包括LPF和用于提供LPF的输出或差分信号的选择器。 运动判断电路还可以包括:周边像素比较电路(可以旁路),用于通过检查目标像素周围的区域的差异信号的极性来检测像素上的运动; 多数检测电路(可以被旁路),用于检测极性偏差检测电路的大部分结果,以判断具有偏离停止侧的运动; 以及极性偏差检测电路,用于在存在目标像素周围的任何周边区域的所有像素的极性一致的情况下,将运动判断为移动。 外围区域的大小被控制。 极性偏差电路可以补偿多数检测电路的结果。 边缘信号的宽度被控制。 还公开了包括上述运动检测电路的噪声抑制装置。