Apparatus for and method of variable bit rate video coding
US6879632B1 · kind B1 · utility
13Cited by
9References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 20, 1999 |
| Grant date | Apr 12, 2005 |
| Priority date | — |
| Expiry date | Dec 20, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The quantization step size is set on the basis of features of image and the average bit rate is adjusted for the variable bit rate coding. In more specifically, the quantization step size is set such as to hold a constant coded image quality level over a plurality of groups of pictures. The quantization step size is adjusted from the excess or shortage of the actual generated bit count with respect to the average bit rate with reference to the quantization step size that has been set as above.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.