Distortion quantizer model for video encoding
US6687294B2 · kind B2 · utility
37Cited by
5References
18Claims
0Family size
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Key dates
| Filing date | Apr 27, 2001 |
| Grant date | Feb 3, 2004 |
| Priority date | — |
| Expiry date | Apr 19, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/60
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A video encoder that allows for the selection of a distortion level, comprising: a selection system for selecting a target distortion level; and a system for determining a quantization parameter q that will ensure compliance with the selected target distortion level, wherein the system includes an algorithm for calculating distortion that utilizes a Gaussian distribution having a variance that is a function of the quantization parameter q. The algorithm is based on a distortion model D(q)=N(a1q2+a2q+a3, b1q2+b2q+b3), wherein N is a Gaussian distribution and a1, a2, a3, b1, b2 and b3 are distortion model parameters.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.