System and method for time division multiplexing of asynchronous video and data signals
US7110457B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | May 9, 2000 |
| Grant date | Sep 19, 2006 |
| Priority date | — |
| Expiry date | May 9, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4342
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for time division multiplexing multiple lower bandwidth signals into a high bandwidth signals such as a high-definition television signal. The invention provides an integrated transmission, distribution and routing signal format in which low-bandwidth signals are embedded in the active video and vertical blanking areas of a high-bandwidth signal. Data from the source data streams, including timing data, is formatted in packets, each packet comprising a plurality of channels. The packets are inserted into the high-bandwidth signal along with a header word providing a ‘data valid bit’ or ‘status bit’ for each of the channels, which identifies valid data words within the packet. The source data streams are accurately reconstituted by de-multiplexing according to header data specifying routing destination, stream ID, stream type, channel usage and stream clock reference for clock recovery at the receiving end.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.