Method and device for accurately and easily measuring a time difference between video and audio
US8358375B2 · kind B2 · utility
2Cited by
4References
8Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 6, 2006 |
| Grant date | Jan 22, 2013 |
| Priority date | — |
| Expiry date | May 18, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8547
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
To solve the problems in the prior art, the present invention provides a method for measuring a time difference between digital video signals and digital audio signals, wherein said method comprises the steps of extracting respective time series data from respective frequency domains of said digital video signals and said digital audio signals; statistically identifying the cross-correlation of said time series data in said frequency domains, thereby measuring the time difference between said digital video signals and said digital audio signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.