System and method for clock skew compensation between encoder and decoder clocks by calculating drift metric, and using it to modify time-stamps of data packets
US6598172B1 · kind B1 · utility
316Cited by
10References
21Claims
0Family size
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Key dates
| Filing date | Oct 29, 1999 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Oct 29, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S370/912
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a coordinated computer system for encoding, transmitting, and decoding a series of data packets such as audio and/or video data, there may be a skew between the clock used by an encoder and the clock used by a decoder. In a method and device for compensating for this clock skew, the decoder calculates a drift metric representing the clock skew and modifies the time stamps of the data packets based on the drift metric. The decoder also performs a sample rate conversion on the digital data, in order to compensate for the clock skew between the encoder and decoder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.