Coding method, code converting method, code converting apparatus, and image forming apparatus
US6577768B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 14, 1999 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Sep 14, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/004
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
This invention relates to a coding method, code converting method and apparatus, and image forming apparatus and, more particularly, to a coding method, code converting method and apparatus, and image forming apparatus capable of high-speed conversion data coded by different coding method. When data is converted between different coding methods, e.g., when data encoded by a run-length coding method is re-encoded by a coding method using typical prediction, the data is conventionally temporarily decoded into original data before encoding and then re-encoded. In this invention, data subjected to coding such as MH, MR, or MMR as run-length coding is decoded into run-length information as intermediate data, and typical prediction is performed in this state. This increases the speed of conversion from run-length coded data to coded data using typical prediction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.