Entropy coding efficiency enhancement utilizing energy distribution remapping
US9398314B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 5, 2008 |
| Grant date | Jul 19, 2016 |
| Priority date | — |
| Expiry date | Feb 19, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/85
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Architecture for enhancing the compression (e.g., luma, chroma) of a video signal and improving the perceptual quality of the video compression schemes. The architecture operates to reshape the normal multimodal energy distribution of the input video signal to a new energy distribution. In the context of luma, the algorithm maps the black and white (or contrast) information of a picture to a new energy distribution. For example, the contrast can be enhanced in the middle range of the luma spectrum, thereby improving the contrast between a light foreground object and a dark background. At the same time, the algorithm reduces the bit-rate requirements at a particular quantization step size. The algorithm can be utilized also in post-processing to improve the quality of decoded video.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.