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http://dx.doi.org/10.5909/JEB.2012.17.2.325

Improving Encoder Complexity and Coding Method of the Split Information in HEVC  

Lee, Han-Soo (Dept. of Computer Engineering, College of Electronics and Information, Kyung Hee University)
Kim, Kyung-Yong (Dept. of Computer Engineering, College of Electronics and Information, Kyung Hee University)
Kim, Tae-Ryong (Dept. of Computer Engineering, College of Electronics and Information, Kyung Hee University)
Park, Gwang-Hoon (Dept. of Computer Engineering, College of Electronics and Information, Kyung Hee University)
Kim, Hui-Yong (ETRI)
Lim, Sung-Chang (ETRI)
Lee, Jin-Ho (ETRI)
Publication Information
Journal of Broadcast Engineering / v.17, no.2, 2012 , pp. 325-343 More about this Journal
Abstract
This paper proposes the coding method to predict the split structure of LCU in the current frame on the basis of the reference frame or temporally-previous frame. HEVC encoder determines split structure according to image characteristics in LCU which is an basic element of CU. The split structure of the current LCU is very similar to the split structure of collocated LCU in the reference frame or temporally-previous frame. Thus, this paper proposes the method to reduce the encoder computational complexity by predicting split structure of the current LCU on the basis of that of collocated LCU in the reference frame or temporally-previous frame. And it also proposes the method to reduce the BD-Bitrate by coding after the prediction of the CU split information. The simulation results of changing only encoder showed that the mean of encoder computational complexity was lower by 21.3%, the decoder computational complexity was negligible change and the BD-Bitrate increase by the maximum of 0.6%. Also, the method changing encoder, bitstream, and decoder improves the mean of encoder computational complexity was lower by 22%, the decoder computational complexity was negligible change and the BD-Bitrate is improved to the maximum of 0.3%. When compared with the conventional method, indicating that the proposed method is superior.
Keywords
HEVC(High Efficiency Video Coding); CU(Coding Unit); Split information;
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