Seamless splicing/spot-insertion for MPEG-2 digital video/audio stream
US6993081B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 23, 1999 |
| Grant date | Jan 31, 2006 |
| Priority date | — |
| Expiry date | Nov 23, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44004
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for a seamless splicing/spot insertion strategy for MPEG-2 digital video/audio transport stream with no previously encoded information. This strategy, considering the time dependency between MPEG-2 frames, results in a new stream with smooth transition from a main stream to a spot stream without any encoded mark increasing possibilities for utilization of MPEG-2 contents. This strategy further facilitates local and remote switching (like local advertisement insertion) and produces successful decoding and presentation of all MPEG-2 packets around the splicing point. It takes into account several kinds of MPEG-2 related discontinuities: transport header continuity counter gaps, temporal reference discontinuity for frame presentation and PCR/PTS/DTS discontinuities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.