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SATD based Intra Mode Decision Algorithm in HEVC/H.265
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- Authors
- Jongho Kim, Sung-Chang Lim, Sukhee Cho, Hui-Yong Kim, Jin Soo Choi
- Issue Date
- 2016-01
- Citation
- International Conference on Consumer Electronics (ICCE) 2016, pp.570-571
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- High Efficiency Video Coding (HEVC) which is the next generation video coding standard provides up to 35 intra prediction modes to improve the coding efficiency. These various prediction modes bring a high computation burden. In this paper, the fast intra mode decision algorithm is proposed to reduce the computational complexity of intra mode decision procedure. The intra mode decision process of HEVC is roughly consisted of two parts. The first part is the rough mode decision process by Hadamard transform and the second part is the full rate-distortion optimization process (RDO) using selected prediction modes by the rough mode decision. The proposed method is concentrated on reducing the number of prediction modes for full RDO process. The final prediction modes for RDO procedure are selected by the amount of Sum of Absolute Transformed Differences (SATD). The average 24.53% of total encoding time is reduced by the proposed method in all intra (AI) profile with negligible loss of quality.
- KSP Keywords
- Coding efficiency, Computational complexity, Decision Procedure, Decision algorithm, Fast Intra Mode Decision, Hadamard Transform, High Efficiency Video coding(HEVC), Loss of quality, Next generation video coding standard, Rate distortion optimization(RDO), Sum of Absolute Transformed Differences(SATD)