Rate control techniques for video encoding using parametric equations
US8340172B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 10, 2005 |
| Grant date | Dec 25, 2012 |
| Priority date | — |
| Expiry date | Feb 10, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
This disclosure describes rate control techniques that can improve video encoding. The described rate control techniques exploit relationships between the number of bits encoded per frame and the number of non-zero coefficients of the video blocks after quantization. The number of number of non-zero coefficients of the video blocks after quantization is referred to as rho (ρ). The value of ρ is generally proportional to the number of bits used in the video encoding. This disclosure utilizes a relationship between ρ and a quantization parameter (QP) in order to achieve rate controlled video encoding. More specifically, this disclosure exploits a parametric equation to map a value of a predicted ρ to a QP.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.