Low complexity SAO in HEVC base on class combination, pre-decision and merge separation

Gaoxing Chen, Zhenyu Pei, Zhenyu Liu, Takeshi Ikenaga

研究成果: Conference contribution

9 被引用数 (Scopus)

抄録

High efficiency video coding (HEVC) is the most recent video compression standard that doubled the coding efficiency as compared to the predecessor H.264/AVC. HEVC adopts sample adaptive offset (SAO) right after deblock filtering process. According to the intensity and the edge property, the encoder classifies the reconstructed pixels into different categories, and assigns one offset for each category of pixels. This paper proposes class combination, pre-decision and merge separation to decrease the sao processing time. Class combination combines the four edge offset (EO) type into one. Pre-decision decreases the band offset (BO) search time from 29 to 4. Merge separation limits the merge range to saving the efficiency loss. Experimental result shows the proposed methods can saving about 38% SAO processing time with little degradation (BD-bitrate increased by 0.16% and ΔPSNR decreased by 0.001) in terms of coding gain.

本文言語English
ホスト出版物のタイトルInternational Conference on Digital Signal Processing, DSP
出版社Institute of Electrical and Electronics Engineers Inc.
ページ259-262
ページ数4
2014-January
ISBN(印刷版)9781479946129
DOI
出版ステータスPublished - 2014
イベント2014 19th International Conference on Digital Signal Processing, DSP 2014 - Hong Kong, Hong Kong
継続期間: 2014 8月 202014 8月 23

Other

Other2014 19th International Conference on Digital Signal Processing, DSP 2014
国/地域Hong Kong
CityHong Kong
Period14/8/2014/8/23

ASJC Scopus subject areas

  • 信号処理

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