HEVC intra mode selection based on Rate Distortion (RD) cost and Sum of Absolute Difference (SAD) |
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| Affiliation: | 1. Department of Computer Science and Artificial Intelligence, College of Computer Science and Engineering, University of Jeddah, Jeddah 21589, Saudi Arabia;2. Department of Computer Science, Lahore Garrison University, DHA, Lahore, Pakistan;3. Department of Computer and Network Engineering, College of Computer Science and Engineering, University of Jeddah, Jeddah 21589, Saudi Arabia |
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| Abstract: | High Efficiency Video Coding (HEVC) encoder provides higher compression efficiency by offering 35 intra modes. However, the encoding complexity is increased due to more modes are involved in the decision process. Therefore, it is desired to build a fast intra prediction algorithm that is practical for real time application. In this paper, a quadratic approach for reducing intra coding complexity is proposed. Firstly, the relationship between the RD-cost and the SAD is investigated. Secondly, a model is proposed to estimate the RD-cost of all 35 intra modes using the quadratic relation, thus avoiding the computation of entropy coding, Hadamard cost, distortion, and transform. Experimental results demonstrate that the average time saving of the proposed approach is 31–38%, while the BD-Bit Rate increment is only 0.62–1.37%, respectively. |
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| Keywords: | Fast intra prediction Low complexity video coding Rough mode decision Rate distortion cost prediction High Efficiency Video Coding (HEVC) Image coding Video coding Video compression |
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