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    • 31. 发明公开
    • Editing apparatus for recording information signals
    • Schneidegerätzur Aufzeichnung von Informationssignalen。
    • EP0240217A2
    • 1987-10-07
    • EP87302448.3
    • 1987-03-20
    • SONY CORPORATION
    • Kojima, Toshiaki Patents Department Sony Corp.
    • G11B27/024
    • G11B5/592G11B15/1875G11B27/024G11B2220/90
    • A method and apparatus for editing video information from one or more video tapes onto a master tape (13), in which different video tape recorders can be used to produce the master tape (13), involves the storage (11) of tracking information that was used in recording a segment at a position immediately preceding the desired editing point on the master tape (13), and also the storage (11) of tracking information that was used in recording another segment at a position on the master tape (13) some time prior to the segment next preceding the edit point. A difference value between the two stored tracking information signals is detected and compared with a predetermined value, and the comparison result is used to select one of the two stored tracking information signals to control the tracking during recording at the desired editing point, so that small head position detector errors will not accumulate over a number of edit points on the master tape (13).
    • 一种用于将视频信息从一个或多个视频磁带编辑到主磁带(13)上的方法和装置,其中可以使用不同的录像机产生主磁带(13),其中涉及存储器(11)的跟踪信息, 用于在主磁带(13)上的所需编辑点之前的位置处记录段,以及用于在主磁带(13)上的位置记录另一段的跟踪信息的存储(11) 在编辑点之前的段之前的一段时间。 检测两个存储的跟踪信息信号之间的差值并将其与预定值进行比较,并且比较结果用于选择两个存储的跟踪信息信号中的一个,以在期望的编辑点记录期间控制跟踪,使得小 磁头位置检测器错误不会累积在主磁带上的多个编辑点上(13)。
    • 32. 发明公开
    • Method and apparatus for synchronizing tape recording and playback machines
    • 用于同步磁带记录和再现设备的方法和装置。
    • EP0191473A2
    • 1986-08-20
    • EP86101770.5
    • 1986-02-12
    • Block, Gerald
    • Block, Gerald
    • G11B27/28G11B27/024G11B31/00
    • G11B31/00G11B27/002G11B27/10G11B27/323G11B2220/90
    • A method and apparatus for synchronizing a plurality of tape recording and playback machines is described. A synchronizing device for each tape machine to be synchronized is provided. The synchronizing devices are coupled to each other via a communications channel included a serial port for transmitting control information and an additional conductor for transmitting master timing reference pulses. A synchronizing device is chosen as a master device. The master device transmits master timing reference pulses via the communica- ions channel to the remaining tape machines, the pulses indicating the start of each frame on the master tape. Each of the remaining tape machines is a slave to the master. Frame numbers for selected frames on the master tape are transmitted on the serial port to the slave tape machines, but only on an infrequent basis, i.e., a frame number is not transmitted for each frame. A local counter in each of the slave synchronizing devices counts the master timing reference pulses to keep track of the master frame numbers between transmitted frame numbers. An apparatus and method also are disclosed for enabling fast synchronization of the slaved tape machines on | start-up and for determining that the tape comes to rest.