Perceptually coding images and videos
US9237343B2 · kind B2 · utility
6Cited by
3References
18Claims
0Family size
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Key dates
| Filing date | Dec 13, 2012 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Jun 29, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/176
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Blocks in pixel images are template matched to select candidate blocks and weights according to a structural similarity and a perceptual distortion of the blocks. The perceptual distortion is a function of a just-noticeable-distortion (JND). A filter outputs a prediction residual between the block and the candidate blocks. The prediction residual is transformed and quantized to produce a quantized prediction residual using the JND. The matching and quantizing is optimized jointly using the perceptual distortion. Then, the quantized prediction residual and the weights are entropy encoded into a bit-stream for later decoding.
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