发明名称 |
Video signal processing circuit of motion adaptive type |
摘要 |
A video signal processing circuit of motion adaptive type includes a circuit for identifying motion of a picture in a video signal on the basis of a difference signal between at least a line signal appearing in an M-th field and a corresponding line signal appearing in an (M-1)th field so that, when a scanning line produced on the basis of the video signal is interpolated between scanning lines of the video signal to improve the picture quality, a signal for interpolating said scanning line is produced in a different manner depending on whether a portion of the video signal to the displayed is a still picture or a moving picture. The motion identifying circuit comprises a horizontal filter spreading the difference signal in the horizontal direction, a circuit delaying the output signal of the horizontal filter by one field after attenuation, a line memory delaying the output signal of the attenuating and delaying circuit by one line, and an output circuit generating a signal identifying the motion of the picture on the basis of the output signals of the horizontal filter, attenuating and delaying circuit and line memory.
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申请公布号 |
US4733297(A) |
申请公布日期 |
1988.03.22 |
申请号 |
US19870036431 |
申请日期 |
1987.04.09 |
申请人 |
HITACHI LTD;HITACHI VIDEO ENG |
发明人 |
KATSUMATA, KENJI;SUGIYAMA, MASATO;OKUDA, AKIHIDE;HIRAHATA, SHIGERU;NAKAGAWA, ISAO;SUZUKI, SUNAO |
分类号 |
H04N11/20;H04N5/14;H04N5/44;H04N7/01;H04N9/78;(IPC1-7):H04N5/14 |
主分类号 |
H04N11/20 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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