Abstract
SATD (Sum of Absolute Transformed Difference) based cost function is adopted to reduce the complexity of HEVC (High Efficiency video coding) codec by selecting up to 8 intra modes for RDO (Rate Distortion Optimization) process. However, transform of all 35 modes, and RDO of 8 modes is bottleneck in intra mode complexity reduction. In this paper, a hybrid approach for reducing intra coding complexity is proposed. Firstly, DC mode is declared as the optimal mode whenever the variance of available reference pixels is zero. Secondly, working of RMD (Rough Mode Decision) is optimized by evaluating transform of fewer modes than 35 modes. Thirdly, modes list to RDO is refined using neigh boring modes correlation concept. Finally, an early PU split termination technique is proposed which compares RD of available sub-PUs to the RD of 2N×2N PU. Experimental results demonstrate that average time saving of the proposed approach is 40%, while the BD-Bit Rate increment is only 0:37%.
| Original language | English |
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| Title of host publication | The 2015 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2015 |
| Publisher | IEEE |
| Pages | 1782-1786 |
| Number of pages | 5 |
| ISBN (Electronic) | 9781479986972 |
| DOIs | |
| Publication status | Published - Oct 2015 |
| Externally published | Yes |
| Event | IEEE International Conference on Systems, Man, and Cybernetics, SMC 2015 - Kowloon Tong, Hong Kong Duration: 9 Oct 2015 → 12 Oct 2015 |
Conference
| Conference | IEEE International Conference on Systems, Man, and Cybernetics, SMC 2015 |
|---|---|
| Abbreviated title | SMC 2015 |
| Country/Territory | Hong Kong |
| City | Kowloon Tong |
| Period | 9/10/15 → 12/10/15 |
Keywords
- HEVC
- Intra mode
- PU split termination
- Rate Distortion Optimization
- RDO
- RMD
- Rough Mode Decision