Image data encoding apparatus providing increased encoding efficiency with reduced dependency on image content
US5331425A · kind A · utility
38Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Jul 19, 1994 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/413
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data encoding apparatus, applicable for example to a facsimile apparatus, increases the degree of image data compression that can be achieved by a variable length encoding scheme, by limiting the maximum amount of data outputted from the encoding apparatus for each scan line to the amount of unencoded image data in a scan line. Generation of increased amounts of data in the case of certain types of image content, as a result of the variable length encoding, is thereby eliminated with a consequent increase in encoding efficiency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.