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    Adaptive digitally controlled motor drive system and method
    1.
    发明授权
    Adaptive digitally controlled motor drive system and method 失效
    自适应数字电机驱动系统及方法

    公开(公告)号：US4749927A

    公开(公告)日：1988-06-07

    申请号：US851007

    申请日：1986-04-11

    申请人： David Rodal ,  Nathan Osborn ,  Robert Steele

    发明人： David Rodal ,  Nathan Osborn ,  Robert Steele

    IPC分类号： H02P7/29 ,  G05B1/01

    CPC分类号： H02P7/2913 ,  G05B2219/41142 ,  G05B2219/42237 ,  Y10S388/901 ,  Y10S388/902 ,  Y10S388/912

    摘要： A digitally controlled motor drive system using a pulse width modulated motor drive receives a desired motor velocity signal and an actual motor velocity signal and it provides a corresponding velocity error signal. The velocity error signal is adjusted in response to a change in the value of a power voltage supplied to the motor. The velocity error signal may be compensated for back electromotive force and/or for static friction in the motor, if desired. The system is simple, reliable and cost effective.

    摘要翻译： 使用脉宽调制电机驱动器的数字控制电动机驱动系统接收所需的电动机速度信号和实际的电动机速度信号，并且它提供相应的速度误差信号。 响应于提供给电动机的电源电压的值的变化来调节速度误差信号。 如果需要，速度误差信号可以补偿电动机的反电动势和/或静摩擦。 系统简单，可靠，性价比高。

    Method and apparatus for combining video sequences with an interactive program guide
    2.
    发明授权
    Method and apparatus for combining video sequences with an interactive program guide 有权
    用于将视频序列与交互式节目指南组合的方法和装置

    公开(公告)号：US06415437B1

    公开(公告)日：2002-07-02

    申请号：US09201528

    申请日：1998-11-30

    申请人： Ted Ludvig ,  Nathan Osborn ,  Donald F. Gordon

    发明人： Ted Ludvig ,  Nathan Osborn ,  Donald F. Gordon

    IPC分类号： H04N5445

    CPC分类号： H04N21/4532 ,  H04N5/44543 ,  H04N5/45 ,  H04N7/163 ,  H04N7/165 ,  H04N21/26283 ,  H04N21/4314 ,  H04N21/47202 ,  H04N21/482 ,  H04N21/4821 ,  H04N21/6547 ,  H04N21/84

    摘要： A method and apparatus for combining video frame sequences with a video display of an interactive program guide (IPG). The apparatus comprises a plurality of compositors that combine background information, video frame sequences and program guide graphics into a single video frame sequence. The sequence is then digitally encoded to form an MPEG-like bitstream. The same background information and video advertising is composited with a different program guide graphic to form another video sequence that is also encoded. A plurality of such sequences are produced with each sequence having a different program guide graphic. Each sequence is encoded and then multiplexed into a transport stream such that all the encoded sequences are transmitted to a subscriber's terminal using a single transport stream. As such, the subscriber can scroll from one program guide to the next without interruption of the background or video display as the program guide graphic is changed. Each graphic contains a set of programs (e.g., channels) listed along a left, vertical axis and each program associated with the channel is identified in a rectangular cell that extends toward the right. The horizontal axis represents time and about 2 hours of programming for ten channels is shown in the graphic.

    摘要翻译： 一种用于将视频帧序列与交互式节目指南（IPG）的视频显示相结合的方法和装置。 该装置包括将背景信息，视频帧序列和节目指南图形组合成单个视频帧序列的多个合成器。 然后将该序列数字编码以形成MPEG类似比特流。 相同的背景信息和视频广告与不同的节目指南图形合成以形成也被编码的另一视频序列。 产生多个这样的序列，每个序列具有不同的节目指南图形。 每个序列被编码，然后被复用到传输流中，使得所有的编码序列都使用单个传输流传输到用户的终端。 因此，当节目指南图形被改变时，用户可以从一个节目指南滚动到下一个而不中断背景或视频显示。 每个图形包含沿着左，竖轴列出的一组程序（例如，通道），并且与通道关联的每个程序在向右延伸的矩形单元中被识别。 横轴表示时间，图中显示十个通道的约2小时编程。

    Method of creating video effects by use of keyframes
    4.
    发明授权
    Method of creating video effects by use of keyframes 失效
    通过使用关键帧创建视频效果的方法

    公开(公告)号：US5638133A

    公开(公告)日：1997-06-10

    申请号：US446180

    申请日：1995-05-19

    申请人： James V. Squier, deceased ,  Raymond C. Blackham ,  John Abt ,  Nathan Osborn

    发明人： James V. Squier, deceased ,  Raymond C. Blackham ,  John Abt ,  Nathan Osborn

    IPC分类号： G06T13/00 ,  G11B27/031 ,  H04N5/262 ,  H04N9/75 ,  H04N9/74

    CPC分类号： G11B27/031 ,  H04N5/262

    摘要： A video effect is created with a video processing machine having a plurality of functions, each of which has a state that is selectively variable in response to change in an associated function parameter. The method comprises selecting a set of functions, specifying a starting keyframe containing a starting value for each of the parameters, specifying an ending keyframe containing ending values for the parameters associated with the functions of the selected set and vacancies for the other parameters associated with other functions, and specifying a number of video frames. The starting keyframe is used to place the machine in a starting state, in which each function has the status defined by the value of its associated parameter in the starting keyframe, and a first video frame is processed with the processing machine in the starting state. The starting keyframe, the ending keyframe and the number of video frames are used to calculate a next frame value for each of the parameters associated with a function in the selected set. The next frame values are used to place the machine in a next frame state, in which each function of the set has the status defined by the next frame value of its associated parameter, while maintaining unaltered the values of the parameters associated with the other functions, and the next video frame is processed with the machine in the next frame state.

    摘要翻译： 使用具有多个功能的视频处理机创建视频效果，每个功能具有响应于相关联的功能参数的变化而选择性地变化的状态。 该方法包括选择一组功能，指定包含每个参数的起始值的起始关键帧，指定包含与所选集合的功能相关联的参数的结束值的结束关键帧，以及与其他参数相关联的其他参数的空位 功能，并指定多个视频帧。 起始关键帧用于将机器置于起始状态，其中每个功能具有由起始关键帧中其关联参数的值定义的状态，并且处理机处于起始状态的第一视频帧被处理。 起始关键帧，结束关键帧和视频帧数用于计算与所选集合中的功能相关联的每个参数的下一帧值。 下一帧值用于将机器置于下一帧状态，其中该组的每个功能具有由其相关参数的下一帧值定义的状态，同时保持与其他功能相关联的参数的值 ，并且下一个视频帧在机器处于下一帧状态。