Method and system for detecting audio and video synchronization
US8699351B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 2009 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Mar 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L43/0852
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system for diagnosing synchronization offsets in IPTV program signals includes generating audio counter values for audio packets and video counter values for video packets, such that synchronized audio packets and video packets have corresponding counter values. The correspondence may be fixed or may be a variable relationship during the IPTV program duration. The difference in arrival times of the audio and video packets may be measured at various IPTV network nodes, and compared to the IPTV program clock. Aberrant values for arrival times may result in a network synchronization alarm at an identified IPTV network node.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.