Fast H.264/AVC to HEVC transcoding based on residual homogeneity

Author

Feiyang Zheng ; Zhiru Shi ; Xiaoyun Zhang ; Zhiyong Gao

Author_Institution

Inst. of Image Commun. & Network Eng., Shanghai Jiao Tong Univ., Shanghai, China

fYear

2014

fDate

7-9 July 2014

Firstpage

765

Lastpage

770

Abstract

The latest High Efficiency Video Coding (HEVC) has achieved better compression performance than H.264/AVC. In order to make full use of the contents encoded by H.264/AVC, high efficient transcoding from H.264/AVC to HEVC is in great need. In this paper, a fast transcoding structure is proposed. It mainly focuses on coding unit (CU) and prediction unit (PU) decision by using blocks´ homogeneity characteristic. The residual homogeneity indicator (RHI) and sum of absolute residual (SAR) value are extracted to early terminate CU partition. Further, the unnecessary PU partitions are excluded by exploring RHI information from H.264/AVC bitstream. Experimental results illustrate that the proposed algorithm achieves about 56.68% complexity saving in terms of encoding time with only 2.2% BDBR loss when compared to the trivial transcoder.

Keywords

data compression; transcoding; video coding; BDBR loss; HEVC transcoding; blocks homogeneity characteristic; coding unit decision; encoding time; fast AVC structure; fast H.264 structure; fast transcoding structure; high efficiency video coding; prediction unit decision; residual homogeneity indicator extraction; sum-of-absolute residual value extraction; Algorithm design and analysis; Complexity theory; Partitioning algorithms; Prediction algorithms; Transcoding; Video coding; HEVC Transcoding; PU partition decision; early CU termination; residual homogeneity;

fLanguage

English

Publisher

ieee

Conference_Titel

Audio, Language and Image Processing (ICALIP), 2014 International Conference on

Conference_Location

Shanghai

Print_ISBN

978-1-4799-3902-2

Type

conf

DOI

10.1109/ICALIP.2014.7009898

Filename

7009898