Audio/video synchronization in a digital transmission system
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United States of America Patent
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-
Jul 4, 1995
Grant Date -
N/A
app pub date -
Sep 30, 1993
filing date -
Sep 30, 1993
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A receiver (FIG. 2 ) for decoding associated compressed video and audio information components transmitted in mutually exclusive 'frames' of data with respective time stamps PTS.sub.vid and PTS.sub.aud respectively, includes a controller (216) which is responsive to the respective received time stamps to provide coarse synchronization by delaying or skipping respective frames of one or the other of the components to approximately time align the two components. Fine synchronization is provided by adjusting the processing or clock frequency (215) of the audio signal processor (212) independent of the video processor (214). The control for the frequency adjustment is related to the difference between audio and video time stamps.
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