Pixel color value encoding and decoding
US6574364B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 19, 1999 |
| Grant date | Jun 3, 2003 |
| Priority date | — |
| Expiry date | Mar 19, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/4884
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A technique for encoding pixel color values for a full or partial digital video image frame has each different color within the image being assigned a color value. The most common one of the colors (0) within the frame or frame segment is identified, and runs of at least three successive pixels of that predominant color are encoded as a first code (00) indicating a run and a second code indicating the run length (LL). Runs of successive pixels having a color (1, 2, 3) other than the predominant color (0) are encoded as successive iterations of a code containing only the respective color value when the run length is less than or equal to a threshold value and as a first code indicating a run (00), a second code indicating a run length (LL), and a third code (CC) identifying the color value when the threshold value is exceeded.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.