公开(公告)号：US4426666A

公开(公告)日：1984-01-17

申请号：US308857

申请日：1981-10-05

申请人： Masaaki Kobayashi ,  Minoru Kohda

发明人： Masaaki Kobayashi ,  Minoru Kohda

IPC分类号： G11B5/53 ,  G11B15/14 ,  H04N5/93

CPC分类号： G11B5/534 ,  G11B15/14 ,  H04N5/93

摘要： A video signal recording/reproducing apparatus has two main rotary heads, two sub-rotary heads, and a recorded video tape. One main rotary head M1 has a +6.degree. azimuth angle and one sub-rotary head S1 has a -6.degree. azimuth angle. The sub-rotary head S1 is mounted near the main rotary head M1. For example, the distance between the main rotary head M1 and the sub-rotary head S1 corresponds to two horizontal sync signal intervals of a video signal. Main rotary head M2 has a -6.degree. azimuth angle and sub-rotary head S2 has a +6.degree. azimuth angle. The distance between the main rotary head M2 and the sub-rotary head S2 is the same as that between M1 and S1. The main rotary head M2 is located at a position opposite to the main rotary head M1 on a rotary head disk. In the fast motion reproduction mode, the main rotary head M1 and the sub-rotary head S1 scan recorded video tracks on the video tape. The reproduced signal of the main rotary head M1 has several lower or zero level positions in one field. The reproduced signal of the sub-rotary head S1 is selectively substituted for the lower or zero level positions of the reproduced signal of the main rotary head M1.

摘要翻译： 视频信号记录/再现装置具有两个主旋转磁头，两个副旋转磁头和记录磁带。 一个主旋转磁头M1具有+6°方位角，一个副旋转磁头S1具有-6°方位角。 副旋转头S1安装在主旋转头M1附近。 例如，主旋转磁头M1和副旋转磁头S1之间的距离对应于视频信号的两个水平同步信号间隔。 主旋转头M2具有-6°方位角，副旋转头S2具有+6°方位角。 主旋转头M2和副旋转头S2之间的距离与M1和S1之间的距离相同。 主旋转头M2位于与旋转磁头盘上的主旋转磁头M1相对的位置。 在快速运动再现模式中，主旋转磁头M1和副旋转磁头S1在视频磁带上扫描记录的视频轨道。 主旋转磁头M1的再现信号在一个磁场中具有几个较低或零电平位置。 副旋转磁头S1的再现信号被选择性地代替主旋转磁头M1的再现信号的低电平或零电平位置。