System and method for compressing data
US7305174B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 28, 2004 |
| Grant date | Dec 4, 2007 |
| Priority date | — |
| Expiry date | Apr 24, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system and method for compressing an image into bit streams allows data to be presented in either lossy or lossless quality. A lossy quality presentation results in some measurable degradation of an image's visual quality upon expansion. A lossless quality presentation displays the image in its original form. The method divides the image to be compressed into a plurality of regions. For each region, a plurality of adjacent pixels are selected and organized into a set. The corresponding sets for each respective region are identified as a group. The pixel sets within each group are encoded and arranged into two bit streams associated with each respective group. Next, each group's respective bit streams are written into a primary bit stream of constant size and possible a supplemental bit stream of variable length for presenting the image in either lossy or lossless quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.