High-Efficiency Image Coding via Near-Optimal Filtering

doi:10.1109/LSP.2017.2732680

CORC > 北京大学 > 信息科学技术学院

	High-Efficiency Image Coding via Near-Optimal Filtering
	Zhang, Xinfeng ; Wang, Shiqi ; Zhang, Yabin ; Lin, Weisi ; Ma, Siwei ; Gao, Wen
刊名	IEEE SIGNAL PROCESSING LETTERS
	2017
关键词	High-efficiency video coding (HEVC) image compression near-optimal filter sample classification wiener filter DEBLOCKING FILTER HEVC STANDARD SIMILARITY REDUCTION
DOI	10.1109/LSP.2017.2732680
英文摘要	Wiener filtering, which has been widely used in the field of image restoration, is statistically optimal in the sense of mean square error. The adaptive loop filter in video coding inherits the design of Wiener filters, and has been proved to achieve significant improvement on compression performance by reducing coding artifacts and providing high-quality references for subsequent frames. To further improve the compression performance via filtering technique, we explore the factors that may hinder the potential performance of Wiener-based filters, and propose a near-optimal filter learning scheme for high-efficiency image coding. Based on the analyses, we observe that the foremost factor affecting the performance of Wiener-based filters is the divergence of statistical characteristics of training samples, instead of the filter taps or shapes. In view of this, we propose an iterative training method to derive the near-optimal Wiener filter parameters by simultaneously labeling sample categories at the pixel level. These parameters are compressed and transmitted to the decoder side to improve the quality of decoded images by reducing the coding artifacts. Experimental results show that the proposed scheme achieves significant bitrate savings compared with high-efficiency video coding in high-bitrate intra coding scenario.; National Research Foundation, Singapore, under its Interactive Digital Media Strategic Research Programme; National Basic Research Program of China (973 Program) [2015CB351800]; SCI(E); ARTICLE; 9; 1403-1407; 24
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/471261]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Zhang, Xinfeng,Wang, Shiqi,Zhang, Yabin,et al. High-Efficiency Image Coding via Near-Optimal Filtering[J]. IEEE SIGNAL PROCESSING LETTERS,2017.
APA	Zhang, Xinfeng,Wang, Shiqi,Zhang, Yabin,Lin, Weisi,Ma, Siwei,&Gao, Wen.(2017).High-Efficiency Image Coding via Near-Optimal Filtering.IEEE SIGNAL PROCESSING LETTERS.
MLA	Zhang, Xinfeng,et al."High-Efficiency Image Coding via Near-Optimal Filtering".IEEE SIGNAL PROCESSING LETTERS (2017).