Encoding and decoding perceptually-quantized video content
US9936199B2 · kind B2 · utility
7Cited by
16References
22Claims
0Family size
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Key dates
| Filing date | Sep 24, 2015 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Sep 24, 2035 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Compared to traditional gamma-coded video, perceptually quantized video provides greater flexibility for the transmission and display management of high-dynamic range video, but it does not compresses as efficiently using existing standard codecs. Techniques are described to improve the coding efficiency of perceptually coded video by applying a color cross-talk transformation after the RGB/XYZ to LMS transformation. Such a transform increases luma and chroma correlation for color appearance models, but improves perceptual uniformity and overall coding efficiency for wide color gamut, HDR, signals.
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