Method and system for rate control
US8995522B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 13, 2007 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | May 1, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/436
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method and system are provided for encoding a picture. The method includes encoding the picture into a first encoded picture using a first universal quantizer. If a size of the first encoded picture is greater than a maximum picture size, the method includes encoding the picture into a second encoded picture using a second universal quantizer. Before a second-pass encoding, the target size and maximum size for each slice is determined. During the second pass encoding, if a size of the encoded slice is greater than the maximum slice size, the method includes encoding the slice using a third local quantizer. If a size of the encoded slice is still greater than a maximum slice size, the method includes dropping coefficients from the encoded slice to ensure that the encoded size never exceeds the maximum size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.