%0 Journal Article %A Yu Yuan and David Feng and Yu-Zhuo Zhong %D 2008 %J International Journal of Computer and Information Engineering %B World Academy of Science, Engineering and Technology %I Open Science Index 13, 2008 %T The Causation and Solution of Ringing Effect in DCT-based Video Coding %U https://publications.waset.org/pdf/3309 %V 13 %X Ringing effect is one of the most annoying visual artifacts in digital video. It is a significant factor of subjective quality deterioration. However, there is a widely-accepted misunderstanding of its cause. In this paper, we propose a reasonable interpretation of the cause of ringing effect. Based on the interpretation, we suggest further two methods to reduce ringing effect in DCT-based video coding. The methods adaptively adjust quantizers according to video features. Our experiments proved that the methods could efficiently improve subjective quality with acceptable additional computing costs. %P 231 - 236