Contour improving circuit
专利汇可以提供Contour improving circuit专利检索，专利查询，专利分析的服务。并且PURPOSE: To attain excellent contour improvement by sampling and holding a front edge of an input signal, applying sampling and holding the tail edge after applying time axis inversion processing and then applying time axis inversion processing again.
CONSTITUTION: A luminance signal is inputted to a control signal generating circuit 31 to generate edge detection signals e, g. On the other hand, when a color difference signal is inputted to a terminal 6, a delay circuit 7 retards the delay of the signal processing for an LPF 2 and an edge detection circuit 3 to obtain a signal h. The signal h is inputted to a sample-and-hold circuit 8 and the control signal e of the edge detection circuit 3 is used to apply sampling and holding to the positive pulse period to obtain a signal i the signal i is projected to the time axis inversion processing to become a signal j by FILO 9 and the signal k is obtained by sampling and holding the positive pulse period of the control signal g the sample-and-hold circuit 10. The signal k is subject to time inversion processing again at the FILO 11 and the result is outputted from an output terminal 12 as a signal l. Thus, the change in the edge part is made steep without causing overshoot or preshoot.
COPYRIGHT: (C)1991,JPO&Japio，下面是Contour improving circuit专利的具体信息内容。
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