Image information coding device and image information communication device with block average information and controllable compression
US5692074A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 19, 1995 |
| Grant date | Nov 25, 1997 |
| Priority date | — |
| Expiry date | Apr 19, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Input image information is divided into blocks each consisting of N.times.N pixels (N: positive integer) by a blocking section to obtain blocked image information. The blocked image information is coded by a coding section. At this time, a coding parameter used in the coding section is estimated by a code amount control section, and the coding section repeats coding plural times until the amount of coded information reaches a target code amount. Then, the coding parameter attaining the target code amount is set into the coding section to perform final coding and output final coded information. In the coding process, a block average as the average of the blocked image information in each block is calculated in any cycle of repetition of coding other than the final cycle. By the use of this block average, an image showing the approximation of the image information can be generated. Accordingly, the approximation of the image information can be output at high speeds, and the generation of the image showing the approximation of the image information can be efficiently performed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.