Picture coding method, picture decoding method, picture coding apparatus, picture decoding apparatus, and program thereof
US7630435B2 · kind B2 · utility
29Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 26, 2005 |
| Grant date | Dec 8, 2009 |
| Priority date | — |
| Expiry date | Aug 3, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The picture decoding method according to the present invention is a decoding method for decoding coded pictures by inverse quantization and inverse orthogonal transformation, in which a quantization matrix which defines a scaling ratio of a quantization step for each component is multiplied by a multiplier, which is a coefficient for frequency transformation or a quantization step, and also, a result of the multiplication is multiplied by a quantized value, as a process of inverse quantization.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.