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    • 16. 发明授权
    • Recording of timing signals synchronous with a rotary recorder member
    • 记录与旋转记录器部件同步的定时信号
    • US4594616A
    • 1986-06-10
    • US571155
    • 1984-01-18
    • Robert A. Dischert
    • Robert A. Dischert
    • H04N5/77H04N9/79H04N5/91G11B15/00
    • H04N9/79H04N5/772Y10S358/906
    • A portable video recorder transduces video signals onto an elongated medium. The transducer-to-medium velocity is controlled by a rotary member such as a capstan, turntable or headwheel. In portable applications, motion of the recorder causes accelerations or variations in velocity of the rotary member which affects the regular spacing on the medium of sync or timing signals transduced thereto. Regular spacing of sync signals is desirable for good reproduction on playback. Timing or sync signals generated by the rotary members are used to control the rate of the timing signals of the video to be recorded as they are applied to the transducer, thereby making the spacing regular.
    • 便携式录像机将视频信号转换到细长介质上。 换能器至中等速度由诸如绞盘,转盘或头轮的旋转部件控制。 在便携式应用中,记录器的运动导致旋转构件的加速度或速度变化,这影响介质上传播的同步信号或定时信号上的规则间隔。 同步信号的规则间距对于播放时的良好再现是期望的。 由旋转构件产生的定时或同步信号用于控制在将其应用于换能器时记录的视频的定时信号的速率,从而使间隔正常。
    • 18. 发明授权
    • FM video transmission system having coring and coring compensation for
reducing effects of triangular noise
    • FM视频传输系统具有取芯和取芯补偿功能,可减少三角噪声的影响
    • US4520396A
    • 1985-05-28
    • US517028
    • 1983-07-25
    • Robert A. DischertRobert L. Libbey
    • Robert A. DischertRobert L. Libbey
    • H04N5/21H04B1/10
    • H04N5/21
    • A video FM transmission system includes a transmitter coupled to a receiver by means of an FM transmission path subject to triangular noise effects. The receiver includes a coring circuit for reducing the noise and the transmitter includes a coring compensation circuit having a transfer function different from and not complementary to the transfer function of the coring circuit. The transfer functions are selected so as to effect greater coring of the triangular noise characteristic of the FM transmission system and lesser coring of the desired small-signal high-frequency components of the video signal thereby providing a desired signal-to-noise ratio enhancement of the video. In preferred embodiments of the invention the transfer functions of both the coring circuit and the coring compensation circuit are provided by programmed read only memories having different and non-complementary programs.
    • 视频FM传输系统包括通过经受三角噪声效应的FM传输路径耦合到接收机的发射机。 接收机包括用于降低噪声的取芯电路,并且发射器包括具有不同于并且不与取芯电路的传递函数互补的传递函数的取芯补偿电路。 选择传递函数以便实现FM传输系统的三角噪声特性的更大的取芯以及视频信号的期望的小信号高频分量的较小取样,由此提供期望的信噪比增强 视频。 在本发明的优选实施例中,取芯电路和取芯补偿电路的传递函数由具有不同和非补充程序的编程只读存储器提供。