Methods and apparatuses for adaptive loop filtering for reducing blocking artifacts
US7551793B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Jan 14, 2005 |
| Grant date | Jun 23, 2009 |
| Priority date | — |
| Expiry date | Apr 9, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N19/82
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A loop filtering method and apparatus are provided. The loop filtering method includes: calculating blocking effect strength based on coding type information, which specifies the coding type of a block to be filtered, a motion vector of the block, and reference frame information, which identifies a reference frame; determining a filtering unit to be used for filtering the block based on the calculated blocking effect strength; and performing filtering on the block using the determined filtering unit. Accordingly, it is possible to provide high-quality HDTV images by determining whether to perform loop filtering and adjusting the degree of loop filtering in consideration of the characteristics of HDTV images.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.