Synchronization of digital video with digital audio
First Claim
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1. A method of synchronizing a plurality of streams of digitized audio/visual data including corresponding streams of absolute time indications with each other, comprising the steps of:
- creating digital reference time base including periodic timing information and a predetermined start time;
identifying a first relationship between the periodic timing information and a first stream of absolute time indicators that corresponds to a first stream of the plurality of streams of digitized audio/visual data, such that the predetermined start time is coincident with a start time of the first stream of absolute time indicators;
identifying a second relationship between the periodic timing information and a second stream of absolute time indicators that corresponds to a second stream of the plurality of streams of digitized audio/visual data, such that the predetermined start time is coincident with a start time of the second stream of absolute time indicators; and
outputting the first and second streams of digitized audio/visual data corresponding to the digital reference time base in accordance with the first relationship and the second relationship, so that the first and second streams of digitized audio/visual data are synchronized.
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Abstract
A method of synchronizing digitized audio information and digitized picture information establishes a reference time base based on timecodes included with the audio and picture information. The reference time base may be used to synchronize output between a digitized source and one which may be digitized or undigitized.
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Citations
1 Claim
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1. A method of synchronizing a plurality of streams of digitized audio/visual data including corresponding streams of absolute time indications with each other, comprising the steps of:
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creating digital reference time base including periodic timing information and a predetermined start time; identifying a first relationship between the periodic timing information and a first stream of absolute time indicators that corresponds to a first stream of the plurality of streams of digitized audio/visual data, such that the predetermined start time is coincident with a start time of the first stream of absolute time indicators; identifying a second relationship between the periodic timing information and a second stream of absolute time indicators that corresponds to a second stream of the plurality of streams of digitized audio/visual data, such that the predetermined start time is coincident with a start time of the second stream of absolute time indicators; and outputting the first and second streams of digitized audio/visual data corresponding to the digital reference time base in accordance with the first relationship and the second relationship, so that the first and second streams of digitized audio/visual data are synchronized.
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Specification