Abstract: 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 informational video 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 transition from one program guide to the next without interruption of the background or video display as the program guide graphic is changed.

Abstract: 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.

Abstract: 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.

Abstract: 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.