Entropy-coding system
US4939583A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 7, 1988 |
| Grant date | Jul 3, 1990 |
| Priority date | — |
| Expiry date | Sep 7, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/419
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An entropy coding system in a code assign system for processing image coded data such that for data (particular data) having a particular value, a run length coding is achieved on a run length thereof and for data (nonparticular data) having a value other than the particular value, a Huffman coding is conducted on the value thereof so as to generate a coded or resultant code. When achieving the Huffman coding on the nonparticular date, for the nonparticular data immediately following particular data, the coding operation is executed by use of a Huffman coding table including prefix codes, whereas for the nonparticular data not immediately following particular data, the coding operation is achieved by use of a Huffman coding table including prefix codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.