Image encoding method, image decoding method, image encoding apparatus, image decoding apparatus, image encoding program, and image decoding program
US7764842B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2007 |
| Grant date | Jul 27, 2010 |
| Priority date | — |
| Expiry date | Feb 28, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/61
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image encoding apparatus 10 according to the present invention is an image encoding apparatus 10 for dividing image signals into blocks, performing an orthogonal transform of each block, reading resultant orthogonal transform coefficients to obtain a coefficient string, and performing entropy coding, which has block selector 14 for selecting a size of a block for the orthogonal transform, out of a plurality of blocks of different sizes; coefficient string divider 12 for, when a block of a size larger than a minimum size is selected by block selector 14, dividing a coefficient string in the block into a plurality of coefficient strings of a length equal to that of a coefficient String in a block of the minimum size; and encoder 13 for performing entropy coding adapted to the coefficient string in the block of the minimum size.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.