Loss tolerant compressed image data
US6608933B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 17, 1997 |
| Grant date | Aug 19, 2003 |
| Priority date | — |
| Expiry date | Aug 26, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T9/007
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for configuring image data, such as data suitable for JPEG compression, into a format that can be streamed and displayed even if part of the image is lost in transmission. The image data is scrambled and compressed into restartable segments of compressed data. After compression, the data is packetized, with segment restart information written into headers accompanying the payload in each packet. When the packets arrive, they are parsed to determine from their restart information which restart segments have arrived. Each restart segment that has arrived is sent to an image decompressor, resulting in a scrambled bitmap image, having gaps wherever data segments were lost. The image is then unscrambled, resulting in small, isolated blocks of missing data psuedo-randomly dispersed throughout the image. Fill-in techniques from the surrounding pixels further improve the perceived image quality.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.