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http://dx.doi.org/10.5909/JBE.2012.17.6.1029

Motion Estimation and Coding Technique using Adaptive Motion Vector Resolution in HEVC  

Lim, Sung-Won (Sejong University, Information and Telecommunication Research Institute, Dept. of Information and Communications Engineering)
Lee, Ju Ock (Sejong University, Information and Telecommunication Research Institute, Dept. of Information and Communications Engineering)
Moon, Joo-Hee (Sejong University, Information and Telecommunication Research Institute, Dept. of Information and Communications Engineering)
Publication Information
Journal of Broadcast Engineering / v.17, no.6, 2012 , pp. 1029-1039 More about this Journal
Abstract
In this papar, we propose a new motion estimation and coding technique using adaptive motion vector resolution. Currently, HEVC encodes a video using 1/4 motion vector resolution. If there are high texture regions in a picture, HEVC can't get a performance enough. So, we insert additional 1-bit flag meaning whether motion vector resolution is 1/4 or 1/8 in PU syntax. Therefore, decoder can recognize the transmitted motion vector resolution. Experimental results show that maximum coding efficiency gain of the proposed method is up to 5.3% in luminance and 7.9% in chrominance. Average computional time complexity is increased about 33% in encoder and up to 5% in decoder.
Keywords
HEVC; Inter prediction; Motion vector estimation; Adaptive motion vector resolution;
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