MPEG stream switching process
US6618438B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 16, 2000 |
| Grant date | Sep 9, 2003 |
| Priority date | — |
| Expiry date | Jan 17, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The process is characterized in that, if: DTS_next_AUold−PCRold<DTS_first_AUnew−PCRnew, then,in a first step, the data of one or more last images of the old stream and/or one or more first images of the new stream are replaced by data of one or more new pre-encoded images of which the number is smaller so that the new value of PCRold and/or PCRnew thus obtained satisfies the relation:DTS_next_AUold−PCRold≧DTS_first_AUnew−PCRnew,in a second step, TS stuffing packets are inserted between the point of exit and the point of entry so as to make the decoding instants DTS_next_AUold and DTS_first_AUnew coincide. Applications relate to the transmission and storage of programs, as well as to the insertion of advertisements or to regional or local handover.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.