Method of switching of coded video sequences and corresponding device
US6351564B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 2, 1999 |
| Grant date | Feb 26, 2002 |
| Priority date | — |
| Expiry date | Feb 2, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/44016
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates, in a video decoder, to a method of switching from a first to a second coded video sequence when the second bit rate is lower than the first one. If the time spent in the decoders buffer by the first bit of the first transmitted picture of the second sequence that has to be decoded, also called vbv_delay, is greater -and therefore not compatible with—than the similar period for the first bit of the first replaced picture of the first sequence, it is then reduced by giving to the bitrate of said first transmitted picture an increased value, in order to obtain the compatibility of the vbv_delays. In case of a limited bandwidth for the bit rates, this reduction operation is successively repeated for as many following pictures as necessary.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.