公开(公告)号：US4761694A

公开(公告)日：1988-08-02

申请号：US706794

申请日：1985-02-28

申请人： Katsuyuki Shudo ,  Hisao Kinjo ,  Keigo Okano ,  Yoshiaki Hanashiro

发明人： Katsuyuki Shudo ,  Hisao Kinjo ,  Keigo Okano ,  Yoshiaki Hanashiro

IPC分类号： G11B20/12 ,  H04N5/781 ,  H04N9/82 ,  H04N5/78 ,  H04N9/491

CPC分类号： H04N9/82

摘要： In apparatus for recording/reproducing a composite video signal on and from a rotary recording medium (1), the field of the composite video signal is detected and only odd or even field signal is delayed by one half (H/2) a horizontal scanning period so that the composite video signal is changed to a modified composite video signal which is recorded on the rotary recording medium (1) together with a field distinguishing signal (Sf) produced using the result of the field detection. The field distinguishing signal (Sf) is arranged to be located at a given time position with respect to a predetermined vertical sync signal of every one frame period of the recording signal on a rotary recording medium (1) driven and rotated at a rotational period equal to the vertical scanning period of the composite video signal. This field distinguishing signal is extracted from a reproduced signal obtained in reproduce mode so that field switching is effected using the reproduced field distinguishing signal thereby delaying only even or odd field signal, which has not been delayed on recording, for obtaining a composite video signal having sync signals which with regular interlaced scanning can be performed.

摘要翻译： 在用于在旋转记录介质（1）上记录/再现复合视频信号的装置中，检测复合视频信号的场，并且仅将奇数或偶数场信号延迟一半（H / 2）水平扫描 周期，使得复合视频信号与使用场检测结果产生的场识别信号（Sf）一起改变为记录在旋转记录介质（1）上的修改的复合视频信号。 场区分信号（Sf）被布置为相对于旋转记录介质（1）上的记录信号的每一帧周期的预定垂直同步信号被定位在给定时间位置，旋转记录介质（1）以等于 到复合视频信号的垂直扫描周期。 从再现模式中获得的再现信号中提取该场区分信号，使得利用再现的场区分信号实现场切换，从而只延迟在记录时尚未延迟的偶场或奇场信号，以获得具有 可以执行具有规则隔行扫描的同步信号。

公开(公告)号：US4564876A

公开(公告)日：1986-01-14

申请号：US443922

申请日：1982-11-23

申请人： Toshinori Takahashi ,  Hisanori Tsumiyama ,  Keigo Okano ,  Yoshitaka Iwabuchi

发明人： Toshinori Takahashi ,  Hisanori Tsumiyama ,  Keigo Okano ,  Yoshitaka Iwabuchi

IPC分类号： G11B5/53 ,  G11B5/588 ,  G11B5/52 ,  G11B21/04 ,  G11B21/18

CPC分类号： G11B5/53 ,  G11B5/588

摘要： A rotary magnetic head device comprises a rotary body mounted with rotary magnetic heads which rotate while scanning over a traveling magnetic tape, where the heads scan over tracks formed obliquely with respect to the longitudinal direction of the tape to reproduce recorded signals, a bearing mechanism for bearing the rotary body in a freely rotatable state and so that the rotary body is freely displaceable along an axial direction thereof, and a displacing mechanism for displacing the rotary body along the axial direction thereof so that the heads follow and scan over the tape.

摘要翻译： 旋转磁头装置包括：旋转体，其安装有旋转磁头，旋转磁头在行进磁带上扫描时旋转，其中磁头扫描在相对于磁带的纵向方向倾斜地形成的磁道上，以再现记录信号;轴承机构， 将旋转体轴承在可自由旋转的状态，使得旋转体沿其轴向方向自由移动;以及位移机构，用于使旋转体沿着其轴向方向移位，使得磁头跟随并在磁带上扫描。