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公开(公告)号：US5111297A
公开(公告)日：1992-05-05
申请号：US560847
申请日：1990-07-31
申请人： Toshiaki Tsuji , Kiyoshi Imai , Atsushi Ishizu
发明人： Toshiaki Tsuji , Kiyoshi Imai , Atsushi Ishizu
摘要： A double-scanning non-interlaced television receiver performs scanning line interpolation by using a memory to reproduce a 1/60 second frame with 525 scanning lines. The receiver has a picture-in-picture (P-in-P) function which inserts a frame (sub-picture) into a part of another frame (main picture). The receiver is provided with a signal processing circuit for implementing the scanning line interpolation and a memory having a frame-wide capacity for producing a sub-picture. The receiver (1) produces a video signal for the main scanning line and a video signal for the interpolated scanning line for the main picture and a video signal for the main scanning line and a video signal for the interpellated scanning line for the sub-picture and (2) performs a double-scanning conversion, thereby providing a sub-picture without causing line flicker.
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公开(公告)号：US5225898A
公开(公告)日：1993-07-06
申请号：US692465
申请日：1991-04-22
申请人： Kiyoshi Imai , Masaaki Fujita , Atsushi Ishizu
发明人： Kiyoshi Imai , Masaaki Fujita , Atsushi Ishizu
摘要： A noise reduction apparatus for use in a television receiver or VCR using the NTSC format, in which a video signal or a demodulated color difference signal is processed by an operational circuit which supplies a noise-reduced output signal to a first one of two series-connected one-frame delay elements and which compares the input video signal with an output signal from the first 1-frame delay element, to execute noise reduction. A degree of noise reduction executed by the operational circuit is controlled in accordance with the degree of correlation between the output signal from the second 1-frame delay element and the input video signal, such that the degree of noise reduction is made small or zero when the correlation is below a predetermined level, indicating the presence of motion components in the video signal. Due to the 2-frame delay used in judging that degree of correlation, the judgement will not be adversely affected by interference components of the video signal which result from interaction between the chroma and high-frequency luminance components of the video signal, when there are no motion components in that signal.
摘要翻译： 一种用于电视接收机或使用NTSC格式的VCR的降噪装置，其中视频信号或解调的色差信号由将噪声降低的输出信号提供给两个串联的第一个的操作电路来处理， 连接的一帧延迟元件，并且将输入视频信号与来自第一1帧延迟元件的输出信号进行比较，以执行降噪。 根据来自第二1帧延迟元件的输出信号和输入视频信号之间的相关程度来控制由操作电路执行的噪声降低程度，使得降低噪声的程度小或为零， 相关性低于预定电平，指示视频信号中存在运动分量。 由于用于判断相关程度的2帧延迟，所以判断不会受视频信号的色度和高频亮度分量之间的相互作用产生的视频信号的干扰分量的不利影响，当有 该信号中没有运动分量。
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公开(公告)号：US5095354A
公开(公告)日：1992-03-10
申请号：US565392
申请日：1990-08-10
申请人： Kenta Sokawa , Atsushi Ishizu , Kiyoshi Imai
发明人： Kenta Sokawa , Atsushi Ishizu , Kiyoshi Imai
摘要： A device detects a correlation between frames represented by a video signal of an interlaced scanning format. A sudden motion of an object represented by the video signal is detected on the basis of the detected correlation. A normal motion of the object represented by the video signal is detected on the basis of the detected correlation. Scanning lines represented by the video signl are interpolated with changeable interpolation characteristics. The interpolation characteristics are changed in response to the detected normal motion of the object. The interpolation characteristics are changed in response to the detected sudden motion of the object.
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