Patents Represented by Attorney Steven A. Robert Platt Bell & Associates Shaw
  • Patent number: 5594660
    Abstract: A multimedia system including an audio/video decoder/decompresser for decoding/decompressing a compressed encoded audio/video data stream to generate video images for display and audio signals for audible reproduction. The multimedia system includes an integrated system and video decoder with an audio/video synchronization circuit for substancially synchronizing the display of video images with audio playback. A method is described for detecting when the playback of audio and the display of video images are out of synchronization. The circuitry includes three programmable registers, a finite state machine and one full adder using an audio presentation time stamp and the video presentation time stamp. The method uses a rounded programmable bias value which is compared with the difference between the video presentation time stamp and the audio presentation time stamps.
    Type: Grant
    Filed: September 30, 1994
    Date of Patent: January 14, 1997
    Assignee: Cirrus Logic, Inc.
    Inventors: Chih-Ta Sung, Tzoyao Chan, Richard Chang, Mark A. Rosenau, Jeffrey G. Ort, Daniel T. Daum, Yuanyuan Sun