Adaptive screen and video coding scheme
US9699468B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 10, 2014 |
| Grant date | Jul 4, 2017 |
| Priority date | — |
| Expiry date | Apr 22, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An adaptive screen and video coding system adaptively selects different coding schemes for coding an image block of a screen or video image based on a type of content included in the image block. The adaptive screen and video coding system further includes a screen coding scheme that classifies pixels of the image block into major colors and escape pixels and convert values of the pixels into index values assigned to the major colors and the escape pixels. Since the number of index values is usually less than a normal range of pixel values, using the index values instead of actual pixel values further facilitate compression and coding of the image block, thus improving coding accuracy and efficiency of the screen or video image. In one embodiment, the adaptive screen and video coding system may be used for screen sharing application.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.