Method, apparatus and computer program product for synchronizing separate compressed video and text streams to provide closed captioning and instant messaging integration with video conferencing
US7561178B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 13, 2005 |
| Grant date | Jul 14, 2009 |
| Priority date | — |
| Expiry date | Jan 8, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/8126
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method, apparatus and computer program product are provided for synchronizing separate compressed video and text streams to provide lightweight closed captioning and instant messaging integration with video conferencing. A video encoder encodes a video stream and periodically generates a synchronization frame event. Each generated synchronization frame event has a unique ID. A text recording agent receives the periodically generated synchronization frame events, and generates text packets associating stored text with the synchronization frame event. A video decoder decodes the video stream, periodically generating the synchronization frame event having the unique ID. A text display agent receives the periodically generated synchronization frame events and associates stored text packets with the synchronization frame events.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.