Non real-time delivery of MPEG-2 programs via an MPEG-2 transport stream
US6771657B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 11, 2000 |
| Grant date | Aug 3, 2004 |
| Priority date | — |
| Expiry date | Dec 18, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4346
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Digital content is extracted from single and multiple-program transport streams for subsequent non-real-time (background) transmission in a bandwidth-efficient manner. At an encoder, several null and/or nonessential (N/N) packets (e.g., packets of unused programs) in a transport stream are replaced by an annotation packet (AP) to obtain non-real-time packets. The non-real time packets are inserted into null packet locations (NU) of a real time transport stream. At a decoder, the annotation packets are used to regenerate a specified number of null packets to maintain the original separation of packets of the non-real time data (for timing purposes), allowing existing hardware and/or software to decode the selected program.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.