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	Analysis and reduction of the ringing effect in video coding
	Yuan Yu ; Sun Lifeng ; Zhong Yuzhuo
	2010-05-06 ; 2010-05-06
关键词	Practical/ image enhancement quantisation (signal) video coding/ ringing effect video coding quantization macroblock-based algorithm quantization precision video quality edge enhancement/ B6135C Image and video coding C5260D Video signal processing
中文摘要	The ringing effect which degrades the subjective video quality is analyzed to counter the misunderstanding that the edge enhancement leads to the ringing effect. The ringing effect is indeed due to the loss of high-frequency components during quantization with those components contained by the sharp edges in the image. A macroblock-based algorithm is developed to reduce the ringing effect at the encoder end. The algorithm adjusts the quantization precision of each macroblock according to the number of sharp edges in the block. The experimental results on the MPEG-2 codec show that the algorithm efficiently reduces the ringing effect and improves subjective video quality while keeping the video average bitrate and the objective video quality almost unchanged. The algorithm does not need to modify the bitstream syntax of the existing video coding standards, which makes it appropriate for a wide range of practical applications.
语种	中文 ; 中文
出版者	Tsinghua Univ. Press ; China
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/10270]
专题	清华大学
推荐引用方式 GB/T 7714	Yuan Yu,Sun Lifeng,Zhong Yuzhuo. Analysis and reduction of the ringing effect in video coding[J],2010, 2010.
APA	Yuan Yu,Sun Lifeng,&Zhong Yuzhuo.(2010).Analysis and reduction of the ringing effect in video coding..
MLA	Yuan Yu,et al."Analysis and reduction of the ringing effect in video coding".(2010).

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