Aerial Video Encoding Optimization Based On x264

Fan Yang, Hongbing Ma

Department of Electronic Engineering, Tsinghua University, Beijing, China.

DOI: 10.4236/ojapps.2013.31B008                

Abstract

x264 video codec uses lots of new video encoding technology based on H.264/AVC video encoding standard which enhances compression efficiency. However this results in so heavy computation that the x264 codec is not fit for real-time encoding application of high resolution video. This paper analyses the character of aerial video and then opti-mizes the inter-frame mode decision and motion estimation in x264 codec according to its character by reducing a lot of unnecessary computation. In the result, about 19% computation and encoding time is reduced with total bits and PSNR decreasing lightly.

Keywords

x264; Aerial Video Encoding; Mode Decision; Motion Estimation

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	Draft Recommendation and Final Draft International Standard of Joint Video Specification, Mar.2003, ITU-T Rec.H.264 and ISO/IEC 14 496-10 AVC, Joint Video Team
[2]	Malavika Bhaskaranand and Jerry D.Gibson. “Low-complexity Video Encoding For UAV Reconnais-sance And Surveillance.” The 2011 Military Communi-cations Conference, Nov.2011.
[3]	Holger Meuel, Ma-cro Mundeloh and J?rn Ostermann. “Low Bit Rate Based ROI Video Coding for HDTV Aerial Surveillance Video Sequence.” 2011 IEEE Computer Society Conference On Computer Vision And Pattern Recognition Workshops, June 2011.
[4]	x264 Software(120711). Available from: http://www.videolan.org/developers/x264.html
[5]	Huanqiang Zeng,Canhui Cai and Kai-Kuang Ma. “Fast Mode Decision For H.264/AVC Based On Macroblock Motion Activity.” IEEE Transactions On Circuits And Systems For Video Technology, Vol.19, No.4, pp.491-499, April 2009.
[6]	Tiesong Zhao, Hanli Wang, Sam Kwong and C.-C.Jay Kuo. “Fast Mode Decision Based on Mode Adaptation.” IEEE Transactions On Circuits and Systems For Video Technology, Vol.20, No.5, pp.697-705, May 2010.
[7]	D.Wu, F.Pan, K.P.Lim, S.Wu, Z.G.Li, X.Lin, S.Rahardja, and C.C.Ko. “Fast Intermode Decision in H.264/AVC Video Coding.” IEEE Transactions On Circuits And Systems For Video Technology. Vol.15, No.7, pp.953-958, July 2005.
[8]	Po-Hung Chen, Hung-Ming Chen, Mon-Chau Shie,Che-Hung Su,Wei-Lung Mao,Chia-Ke. Huang. “Adaptive Fast Block Mode Decision Algorithm for H.264/AVC.” 2010 the 5th IEEE conference on Industrial Electronics and Applications, June 2010.