Decoding method, decoding apparatus, coding method, and coding apparatus using a quantization matrix
US9369718B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 29, 2010 |
| Grant date | Jun 14, 2016 |
| Priority date | — |
| Expiry date | Aug 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A decoding method includes: obtaining a plurality of quantization parameter sets from a header of a coded stream; parsing an identifier from a header of a coded picture included in the coded stream; selecting at least one quantization parameter set from among the plurality of quantization parameter sets, based on the parsed identifier; determining whether a flag parsed from the header of the coded picture has a predetermined value; generating a new quantization matrix from another quantization matrix when the flag has the predetermined value; decoding the coded picture by inversely quantizing the coded picture using the generated new quantization matrix; and decoding the coded picture by inversely quantizing the coded picture using a quantization matrix included in the selected quantization parameter set when the flag does not have the predetermined value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.