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seen for legesinstellning of atergivningselement and device for utforande of set

机译:见于为就座定罪判刑的判例和判刑成套设备

摘要

In video recorders where the video information is alternately recorded in oblique tracks by means of two heads, there are generally provided fine control mechanisms for centering the heads relative to the track to be followed. These mechanisms do not detect whether the two heads occupy a correct position relative to each other so that their position relative to each other may differ by an amount corresponding to one track or a group of tracks. The disclosed method of controlling the two heads so that they occupy a correct position relative to each other assumes the use of a recording medium with signals reproduced by the heads contain pilot signals such that in the case of a correct reading of two consecutive tracks, the detected pilot signals are spaced at a nominal time interval from each other, i.e. half the revolution period of the head disk. The time interval between the detection of two consecutively pilot signals is measured and if that time interval deviates from the nominal time interval by a predetermined amount, the position of the two heads relative to each other in a direction transverse to the recording tracks is corrected.
机译:在通过两个磁头将视频信息交替记录在倾斜磁道中的视频记录器中,通常提供了用于使磁头相对于待跟踪磁道居中的精细控制机构。这些机构不检测两个头是否相对于彼此占据正确的位置,以使得它们相对于彼此的位置可以相差一个轨道或一组轨道的量。所公开的控制两个磁头以使它们相对于彼此占据正确位置的方法假定使用了记录介质,其中磁头所再现的信号包含导频信号,从而在正确读取两个连续磁道的情况下,检测到的引导信号以标称时间间隔彼此间隔,即磁头磁盘旋转周期的一半。测量两个连续导频信号的检测之间的时间间隔,并且如果该时间间隔偏离标称时间间隔预定量,则校正两个磁头在垂直于记录轨道的方向上相对于彼此的位置。

著录项

  • 公开/公告号SE7906914L

    专利类型

  • 公开/公告日1980-02-23

    原文格式PDF

  • 申请/专利权人 PHILIPS NV;

    申请/专利号SE19790006914

  • 发明设计人 SANDERSON H J;

    申请日1979-08-20

  • 分类号G11B5/58;

  • 国家 SE

  • 入库时间 2022-08-22 18:18:56

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