CIRCUIT FOR COMPENSATING VIDEO SIGNAL,申请号JP19910357562-传众专利搜索

CIRCUIT FOR COMPENSATING VIDEO SIGNAL

申请公布号：JPH05183778(A)

申请号：JP19910357562

申请日期：1991.12.26

申请公布日期：1993.07.23

申请人：

VICTOR CO OF JAPAN LTD

发明人：TAKAGUCHI TATSUYOSHI

分类号：H03G11/00;H04N5/21;H04N5/93

主分类号：H03G11/00

摘要：PURPOSE:To provide a video signal compensating circuit where exact compensation is operated to a video signal by specially reducing the errorneous detection of a ringing component concerning the video signal compensating circuit which is appropriate to various kinds of video signal processors such as VTR, a picture processor, an encoder for broadcasting in addition to a television receiver. CONSTITUTION:The front side part and rear side part of an edge are independently detected by a front edge detecting part 6-1 and a rear edge detecting part 6-2. Two detecting signals are amplitude-limited by non-linear amplitude limiters 6-5 and 6-6 and, then, a max. value selecting circuit 6-8 obtains a max. amplitude value and a dividing circuit 6-9 obtains an amplitude ratio. The optimum mixture rate of a signal with LPF 1-2 and an original signal is decided in a matrix circuit 6-10 in accordance with the two values. Thus, an output signal where exact compensation is operated is obtained.