Method for conversion between YUV 4:4:4 and YUV 4:2:0
US8139081B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 7, 2007 |
| Grant date | Mar 20, 2012 |
| Priority date | — |
| Expiry date | May 10, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2340/10
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods for converting between a first color space format and a second color space format are described herein. The system receives a video cell in a first color space format comprising a plurality of pixels. Each pixel in the cell has a luminance value and a chrominance value. The luminance values of each pixel are compared to determine the brightest pixel in the received cell. The cell is downsampled to generate a second cell in a second color space format. The second cell in the second color space format comprises a downsampled chrominance value that is computed based at least in part on the chrominance value of the brightest pixel. The method advantageously reduces tinting of a high intensity pixel by the chrominance component of a neighboring low-intensity pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.