公开(公告)号：US5172239A

公开(公告)日：1992-12-15

申请号：US512997

申请日：1990-04-23

申请人： Tadanori Nakayama ,  Hiroyuki Makuta

发明人： Tadanori Nakayama ,  Hiroyuki Makuta

IPC分类号： G11B15/467 ,  G11B15/473 ,  G11B27/024 ,  G11B27/029 ,  G11B27/32 ,  H04N5/782 ,  H04N9/79

CPC分类号： G11B15/473 ,  G11B15/467 ,  G11B27/029 ,  G11B27/324 ,  G11B2220/90 ,  G11B27/024 ,  H04N5/782 ,  H04N9/79

摘要： A signal generator generates a control signal for use in tracking control of a VTR. The control signal is a composite signal including a reference signal and timing information of a frame signal and a color frame signal, which is formed by changing the duty ratio of the reference signal, having N times (where N is a natural number larger than 2) the frequency of the frame signal and a first duty ratio, to a second duty ratio at a predetermined position and to a third duty ratio at another position during the period of the color frame signal. A signal separator separates the frame signal and the color frame signal from the reproduced control signal by detecting the first or second duty ratio from the control signal, which is generated from the control signal generator, recorded on and reproduced from a video tape.

摘要翻译： 信号发生器产生用于跟踪VTR控制的控制信号。 控制信号是包括参考信号和帧信号和彩色帧信号的定时信息的复合信号，其通过改变具有N次（其中N是大于2的自然数）的参考信号的占空比而形成 ）帧信号的频率和第一占空比，在彩色帧信号的周期期间在另一位置处的预定位置处的第二占空比和第三占空比。 信号分离器通过从记录在录像带上并从录像带再现的控制信号发生器产生的控制信号中检测第一或第二占空比来分离帧信号和彩色帧信号与再生控制信号。