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Academic Journal of Computing & Information Science, 2019, 2(1); doi: 10.25236/AJCIS.010013.

A Two-Stage Fast Mode Decision Algorithm for Intra Prediction in HEVC

Author(s)

Shihua Xi*, Min Shi

Corresponding Author:
Shihua Xi
Affiliation(s)

College of Information Science and Technology, Jinan University, Guangzhou, 510632, China
*Corresponding author e-mail: [email protected]

Abstract

The latest video coding standard named H.265/HEVC (High Efficiency Video Coding) offers high compression. In the intra coding of HEVC, potential intra modes up to 35 should be checked to get the best mode which have optimal rate distortion cost. The process is highly time-consuming. To alleviate the encoder computation, a novel two-stage fast intra mode decision algorithm is proposed based on mode probability statistics in this paper. A hierarchical mode decision method for Rough Mode Decision (RMD) aim to reduce the number of prediction modes. Adaptive mode decision method based on rate-distortion optimized quantization (RDOQ) mainly focuses on how to reduce mode candidates. The experimental results suggest that the proposed algorithm could reduce 31.5% encoding time on average while BD-RATE may increase by up to 0.85% for HEVC reference software HM16.9 under all-intra configuration.

Keywords

High Efficiency Video Coding (HEVC), intra prediction, fast mode decision, texture direction

Cite This Paper

Shihua Xi, Min Shi, A Two-Stage Fast Mode Decision Algorithm for Intra Prediction in HEVC. Academic Journal of Computing & Information Science (2019) Vol. 2: 1-11. https://doi.org/10.25236/AJCIS.010013.

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