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    • 3. 发明授权
    • Video tape recorder with a joint-recording capability and a video camera
having the same
    • 具有联合记录功能的录像机和具有相同记录功能的摄像机
    • US5050009A
    • 1991-09-17
    • US257097
    • 1988-10-13
    • Kimihide TakahashiYoshiaki Nakayama
    • Kimihide TakahashiYoshiaki Nakayama
    • G11B15/02G11B15/087G11B15/467G11B27/024
    • G11B15/087G11B15/02G11B27/024Y10S358/906
    • A helical scan video tape recorder includes a recording device having a head cylinder which carries magnetic heads therewith for rotating the head cylinder and applying incoming video signals to the magnetic heads to record the signals on a magnetic tape. A tape transport mechanism transports the tape while maintaining the tape in sliding contact with the head cylinder. A servo-lock sensing circuit senses a servo-locked condition in the recording device. A system controller responds to a record command entered on an operation board for controlling the tape transport mechanism to transport the tape in one direction to thereby record the video signals on the tape. In response to a record stop command also entered on the operation board, the system controller continuously records the video signals on the tape until a predetermined period of time expires after the entry of the record stop command, then controls the tape transport mechanism to stop transporting the tape, and then returns the tape by a predetermined length in the other direction. Further, upon the entry of the next record command, the system controller controls the tape transport mechanism to transport the tape in the one direction while servo-controlling the recording device and, when the servo-lock sensing circuit senses a servo-locked condition, controls the recording device to record the video signals on the tape. The predetermined period of time is selected such that a position on the tape where the servo-locked condition has been sensed substantially does not precede a position on the tape which is associated with the instant when the record stop command has been entered. A video camera may be implemented by such a video tape recorder and a video signal source which feeds video signals representative of a scene to the recorder by shooting the scene.
    • 一种螺旋扫描磁带录像机包括一个记录装置,该记录装置具有磁头筒,该磁头筒带有用于旋转头磁鼓的磁头,并将输入的视频信号施加到磁头上以将信号记录在磁带上。 磁带传送机构在保持磁带与磁头气缸滑动接触的同时传送磁带。 伺服锁感测电路感测记录装置中的伺服锁定状态。 系统控制器响应输入到操作板上的记录命令,用于控制磁带传送机构沿一个方向传送磁带,从而将磁带上的视频信号记录在磁带上。 响应于也在操作板上输入的记录停止命令,系统控制器在记录停止命令输入之后连续记录磁带上的视频信号直到预定的时间段到期,然后控制磁带传送机构停止传送 磁带,然后在另一个方向上将磁带返回预定长度。 此外,当进入下一个记录命令时,系统控制器控制磁带传送机构在伺服控制记录装置的同时沿一个方向传送磁带,并且当伺服锁定感测电路感测到伺服锁定状态时, 控制记录装置将视频信号记录在磁带上。 选择预定时间段,使得已经感测到伺服锁定状态的磁带上的位置基本上不在与已经输入记录停止命令的时刻相关联的磁带上的位置之前。 可以通过拍摄场景的这种录像机和视频信号源来实现视频摄像机,视频信号源将表示场景的视频信号馈送到记录器。