Methods and apparatus for editing digital video recordings, and recordings made by such methods
US6952521B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 26, 2001 |
| Grant date | Oct 4, 2005 |
| Priority date | — |
| Expiry date | Oct 6, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/426
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Various methods are disclosed for producing an edited MPEG audio/video stream from first and second streams recorded in a transport-stream format normally intended for broadcast purposes. According to one implementation, a bridge sequence is generated which recodes data from both of the original streams, in the region of the edit point. Padding packets are inserted in the elementary streams to adjust a continuity counter values so as to allow continuous decoding across the join between bridge sequence and second sequence proper. In another implementation, seamless playback is not required, the bridge sequence is omitted, and various process are implemented “on-the-fly” to generate an edited stream compliant with MPEG-2 specification. To this end, exit and entry points are constrained to certain types of coded pictures, and offset between time-bases is adjusted to avoid buffer overflow.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.