Learning filters for enhancing the quality of block coded still and video images
US8204128B2 · kind B2 · utility
15Cited by
13References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 1, 2008 |
| Grant date | Jun 19, 2012 |
| Priority date | — |
| Expiry date | Apr 20, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The invention relates to a method and an apparatus for reducing blocking artifacts in block-wise coding of still and video images. A learning filter generator is provided at the image encoder for generating a set of filters and associated filtering rules for filtering cross-boundary image patterns based on representative original and decoded training images using a supervised machine learning algorithm. An adaptive filter at the image decoder receives the generated filters and associated filtering rules and performs locally adaptive filtering in accordance with the received filtering rules.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.