Dynamically switching quant matrix tables within an MPEG-2 encoder
US6999511B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 23, 1999 |
| Grant date | Feb 14, 2006 |
| Priority date | — |
| Expiry date | Oct 12, 2020 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A digital video encoder is presented adapted for dynamically switching between sets of quantizer matrix tables without pausing encoding of a stream of video data. Two or more sets of quantizer matrix tables are held at the encoder's quantization unit and compressed store interface for dynamically switching between sets of quant matrix tables at a picture boundary of the sequence of video data, i.e., without stopping encoding of the sequence of video data. Further, while one set of matrix tables is being employed to quantize the stream of video data, the encoder can be updating or modifying another set of quantization matrix tables, again without stopping encoding of the sequence of video data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.