Systems and methods for synchronizing operations among a plurality of independently clocked digital data processing devices without a voltage controlled crystal oscillator

  • US 8,938,637 B2
  • Filed: 02/10/2014
  • Issued: 01/20/2015
  • Est. Priority Date: 07/28/2003
  • Status: Active Grant
First Claim
Patent Images

1. A digital data processing device comprising:

  • an interface to receive multimedia information arranged as a plurality of frames, each frame to include one or more samples and an indication of when to play the one or more samples in a frame;

    an information buffer to store the plurality of frames for play back by the digital data processing device,wherein the digital data processing device is to receive clock information from a source device and determine a time differential value between the received clock information and clock information associated with the digital data processing device, the time differential value to be applied with the indication of when to play each of the plurality of frames to store an updated indication of when to play each of the plurality of frames in the information buffer; and

    an output to play back one or more samples in a frame from the information buffer according to the updated indication of when to play the frame,wherein the digital data processing device is to adjust, based on a comparison between the updated indication of when to play the frame and a predicted time value for play back of the frame, a number of samples per frame that are to be played.

View all claims
    ×
    ×

    Thank you for your feedback

    ×
    ×