Disc and videodisc reader head positioning control system
    1.
    发明授权
    Disc and videodisc reader head positioning control system 失效
    光盘和视盘读卡头定位控制系统

    公开(公告)号:US4555736A

    公开(公告)日:1985-11-26

    申请号:US369977

    申请日:1982-04-19

    摘要: A videodisc reader head positioning control system stores the keyed-in address for a desired picture frame and compares it to the track address for the frames during passage of the reader head toward the desired frame. Logic circuitry distinguishes the difference between the desired address and the address of the head's current position in order to control the head positioning unit at a fast, intermediate, or precision speed. Upon reaching the desired address, the logic circuitry maintains the position of the head for stop frame display of the picture information.

    摘要翻译: 视盘读取器头部定位控制系统存储所需图像帧的键入地址,并且在阅读器头朝向期望帧期间将其与帧的轨道地址进行比较。 逻辑电路区分所需地址与头部当前位置的地址之间的差异,以便以快速,中间或精确的速度控制头部定位单元。 在达到期望的地址时,逻辑电路保持头部的位置用于图像信息的停止帧显示。