An improved hybrid fast mode decision method for H.264/AVC intra coding with local information

• Published in: Multimedia tools and applications Vol. 72; no. 1; pp. 687 - 704
• Main Authors: Chen, Changnian, Chen, Jiazhong, Xia, Tao, Ju, Zengwei, Po, Lai-Man
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.09.2014; Springer; Springer Nature B.V
• Subjects: Algorithms; Analysis; Applied sciences; Artificial intelligence; Blocking; Coding; Coding, codes; Complexity; Computer Communication Networks; Computer Science; Computer science; control theory; systems; Correlation; Data compression; Data Structures and Information Theory; Decision analysis; Decision making; Exact sciences and technology; Information, signal and communications theory; Methods; Multimedia; Multimedia computer applications; Multimedia Information Systems; Pattern recognition. Digital image processing. Computational geometry; Pixels; Signal and communications theory; Special Purpose and Application-Based Systems; Studies; Telecommunications and information theory; Edge filter; Intra prediction; Most probable mode; H.264/AVC; Video coding; Experimental result; Fast algorithm; Hybrid mode
• ISSN: 1380-7501; 1573-7721
• DOI: 10.1007/s11042-013-1388-x

In this paper, an improved hybrid fast mode decision method for H.264/AVC intra coding is proposed, which is based on the analysis of edge filter and more efficient mode selection. In contrast to the conventional fast mode decision methods where multiple neighbor modes are determined by the same filter, a unique filter is applied to each directional mode to eliminate the correlation among neighbor modes. To reduce the complexity, the filters are only applied to the selected pixels that cover most of the block region. After that, the results along prediction residuals of these pixels are summed for fast mode decision. Moreover, local information is also taken into account through Most Probable Mode (MPM) from neighbor-coded blocks. Experimental results demonstrated that better coding performance is achieved as compared with well-known conventional fast mode decision algorithms for H.264/AVC intra coding.