Abstract
High efficiency video coding (HEVC) is the most recent video compression standard that doubled the coding efficiency as compared to the predecessor H.264/AVC. HEVC adopts sample adaptive offset (SAO) right after deblock filtering process. According to the intensity and the edge property, the encoder classifies the reconstructed pixels into different categories, and assigns one offset for each category of pixels. This paper proposes class combination, pre-decision and merge separation to decrease the sao processing time. Class combination combines the four edge offset (EO) type into one. Pre-decision decreases the band offset (BO) search time from 29 to 4. Merge separation limits the merge range to saving the efficiency loss. Experimental result shows the proposed methods can saving about 38% SAO processing time with little degradation (BD-bitrate increased by 0.16% and ΔPSNR decreased by 0.001) in terms of coding gain.
| Original language | English |
|---|---|
| Title of host publication | International Conference on Digital Signal Processing, DSP |
| Publisher | Institute of Electrical and Electronics Engineers Inc. |
| Pages | 259-262 |
| Number of pages | 4 |
| Volume | 2014-January |
| ISBN (Print) | 9781479946129 |
| DOIs | |
| Publication status | Published - 2014 |
| Event | 2014 19th International Conference on Digital Signal Processing, DSP 2014 - Hong Kong, Hong Kong Duration: 2014 Aug 20 → 2014 Aug 23 |
Other
| Other | 2014 19th International Conference on Digital Signal Processing, DSP 2014 |
|---|---|
| Country/Territory | Hong Kong |
| City | Hong Kong |
| Period | 14/8/20 → 14/8/23 |
Keywords
- Class combination
- HEVC
- Merge separation
- Pre-decision
- Sample adaptive offset
ASJC Scopus subject areas
- Signal Processing