公开(公告)号：US5005074A

公开(公告)日：1991-04-02

申请号：US437952

申请日：1989-11-17

申请人： Stuart S. Perlman

发明人： Stuart S. Perlman

IPC分类号： H03H21/00 ,  H04N9/78

CPC分类号： H04N9/78

摘要： A multimode comb filter for comb filtering, e.g., NTSC and/or PAL video signals includes delay means for concurrently providing video signals representing three adjacent horizontal lines. First and second combining means coupled to the delay means provide alternate 1-H comb filter signals in both the NTSC and PAL modes. Control circuitry coupled to the delay means generates a control signal for adaptively selecting the one of the alternate 1-H comb filtered signals or appropriate proportions of both alternate 1-H comb filtered signals to form an output comb filtered signal.