Fast Mode Decision Technique for HEVC Intra Prediction Based on Reliability Metric for Motion Vectors

Chihiro TSUTAKE  Yutaka NAKANO  Toshiyuki YOSHIDA  

Publication
IEICE TRANSACTIONS on Information and Systems   Vol.E99-D   No.4   pp.1193-1201
Publication Date: 2016/04/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2015EDP7244
Type of Manuscript: PAPER
Category: Image Processing and Video Processing
Keyword: 
H.265/HEVC,  intra prediction,  mode decision,  reliability metric,  coding efficiency,  computational complexity,  

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Summary: 
This paper proposes a fast mode decision technique for intra prediction of High Efficiency Video Coding (HEVC) based on a reliability metric for motion vectors (RMMV). Since such a decision problem can be regarded as a kind of pattern classification, an efficient classifier is required for the reduction of computation complexity. This paper employs the RMMV as a classifier because the RMMV can efficiently categorize image blocks into flat(uniform), active, and edge blocks, and can estimate the direction of an edge block as well. A local search for angular modes is introduced to further speed up the decision process. An experiment shows the advantage of our technique over other techniques.