公开(公告)号：US3614305A

公开(公告)日：1971-10-19

申请号：US3614305D

申请日：1969-04-22

Applicant: VICTOR COMPANY OF JAPAN

Inventor： HIDAKA TSUNEYOSHI ,  MORITA AKIYOSHI ,  HONJO YOSHIHIKO ,  NISHIMURA TAKASHI

IPC: H04N9/898

CPC classification number: H04N9/898

Abstract: A color signal correction system for a video magnetic tape recorder removes differential frequency changes and differential phase shifts. The system comprises a trigger oscillator which oscillates in phase with a burst signal taken out of the color signal. A first means frequency modulates a color signal filtered out of the reproduced color video signal, and a second means frequency modulates the oscillation frequency of the oscillator. The output signals of the first and second frequency modulation means are mixed to produce a signal having the differential frequency removed therefrom. Control means is provided to control the natural resonant frequency of the tank circuit of the trigger oscillator, the control corresponding to the differential frequency changes and the differential phase shifts.

公开(公告)号：US3681518A

公开(公告)日：1972-08-01

申请号：US3681518D

申请日：1970-05-08

Applicant: VICTOR COMPANY OF JAPAN

Inventor： HIDAKA TSUNEYOSHI ,  MORITA AKIYOSHI ,  HONJO YOSHIHIKO ,  NISHIMURA TAKASHI

IPC: H04N9/898 ,  H04N5/76

CPC classification number: H04N9/898

Abstract: A color video signal correction system for a video tape recorder removes stably differential frequency changes and differential phase shifts. The system comprises a trigger oscillator which oscillates in phase with a burst signal taken out of the chrominance signal. A phase comparator circuit means compares a phase of a horizontal synchronizing signal separated from a luminance signal, by a horizontal synchronizing separation circuit means, with a phase of a horizontal synchronizing signal delayed in one horizontal line scanning time from the separated horizontal synchronizing signal. The trigger oscillator is controlled by an output of the phase comparator.

Abstract translation: 用于磁带录像机的彩色视频信号校正系统消除了稳定的差分频率变化和差分相移。 该系统包括与从色度信号中取出的脉冲串信号同相振荡的触发振荡器。 相位比较器电路装置将由水平同步分离电路装置从亮度信号分离的水平同步信号的相位与从分离的水平同步信号在一个水平行扫描时间延迟的水平同步信号的相位进行比较。 触发振荡器由相位比较器的输出控制。