Image encoding apparatus, image decoding apparatus, image encoding method, image decoding method, image encoding program, and image decoding program
US7970223B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 11, 2009 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Dec 16, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/91
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A variable-length encoder that feeds a Coded Block Pattern (CBP) as an input symbol to variable-length code output part. Coded symbol memory supplies CBPs in neighboring blocks as coding map table reference information to coding map table provider. Coding map table provider determines a coding map table used in coding of the CBP, based on these CBPs in the neighboring blocks, and provides a coding map table H4 to variable-length code output part. Variable-length coding table provider feeds a variable-length coding table to variable-length code output part. Then the coding target CBP is subjected to variable-length coding, and the resultant is outputted as coded data. This allows information source coding of coding symbols to be performed efficiently according to the coding condition and the property of image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.