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1. 发明专利

JPH11196381A TIME BASE CORRECTOR 失效
公开(公告)号：JPH11196381A
公开(公告)日：1999-07-21
申请号：JP36040497
申请日：1997-12-26
申请人： FOR A CO LTD
发明人： OYAGI KATSUTOSHI
IPC分类号： H04N5/956 , H04N9/896
摘要： PROBLEM TO BE SOLVED: To stably operate a time base corrector even at the time of omission of an input synchronizing signal or when there is noise by adding a function which regenerates a new synchronizing signal that is synchronously connected to an input video signal and switching a synchronizing signal or a reproduced synchronizing signal. SOLUTION: Switching circuits 7 and 8 switch and output horizontal and vertical synchronizing signals which are respectively regenerated by a synchronizing signal generator 6 according to a decision output of a decision circuit 9 which decides the mode of an input video signal from a terminal 1 in a mode as a frame synchronizer and respectively switch and output input horizontal and vertical synchronizing signals from a synchronous separation circuit 2 in a mode as a time base corrector. They are used for a synchronous circuit such as memory control via terminals 12 and 13 respectively and also, a clock is generated by a PLL circuit 4 which is synchronized with a horizontal synchronizing signal of the terminal 12 and undergoes phase control and is connected and used from a terminal 11 as a clock for an analog-digital converter, memory, etc.

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