Patent US5557423A successfully refreshed from Google Patents.
US5557423A
Expired / Lapsed
US
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Synchronization of digital video with digital audio
Assignee: Avid Technology Inc
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Filing: 1994-11-23
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Granted: 1996-09-17
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Expires: 2014-11-23
Abstract
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.
Inventors
- 👤 Michael Phillips
- 👤 Patrick O'Connor
- 👤 Eric Peters
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 19:17
CPC Classifications
G; G11; G11B; G11B27/00; G11B27/02; G11B27/031; G11B27/002; G11B27/06; G11B27/10; G11B27/11; G11B27/19; G11B27/24; G11B27/28; G11B27/32; G11B27/322; G11B27/323; H; H04; H04N; H04N5/00; H04N5/76; H04N5/91; H04N5/92; H04N5/926; H04N5/9265; H04N5/9267; G11B2220/00; G11B2220/20; G11B2220/90; H04N5/84; H04N5/85
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
185 words
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.
Claim 2
Independent Claim
185 words
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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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-09-17 | 2000-03-18 | 2000-09-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-09-17 | 2004-03-18 | 2004-09-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-09-17 | 2008-03-18 | 2008-09-17 | $7700.00 | Window Closed / Lapsed |