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一种利用视觉掩蔽效应的感兴趣区域视频编码方法

DOI: 10.11834/jig.20100602

Keywords: 视觉掩蔽效应,视频编码,感兴趣区域,量化

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Abstract:

传统感兴趣区域视频编码方法通过整体降低ROI区域的量化参数来实现ROI质量优化,会造成整体率失真性能的下降,尤其在低码率时下降更加严重。针对这一问题,结合人眼掩蔽特性的精细Grid量化方法在文中提出,可有效提高ROI质量并降低整体质量的损失。而且该量化方法能够根据ROI尺寸大小对初始感知权重进行自适应调节,适用于ROI特征不同的视频序列。实验结果表明,对于不同特征的标准测试序列,在中低码率条件下和H.264相比,本文算法能平均提高ROI的PSNR值1.905dB,主观感受有明显提升。和同类ROI算法相比,ROI质量平均提升0.47dB,整体质量提高0.625dB。

References

[1]  Peng W H,Chai T.Adding selective enhancement in scalable video coding for region-of-interest functionality[C]//Proceeding of IEEE International Symposium on Circuits and Systems.Island of Kos,Greece:IEEE Press,2006:3089-3093.
[2]  Li Weiping.Overview of fine granularity scalability in MPEG-4 video standard[J].IEEE Transactions on Cireuits and Systems for Video Technology,2001,11(3):301-318.
[3]  Sehaar M.Content-based selective enhancement for streaming video[C]//Proceeding of International Conference on Image Processing.Thessuloniki,Greece:IEEE Press.2001:977-980.
[4]  He Yuwen.Block-based fine granularity sealable video coding for content-aware streaming[C]//Proceeding of International Conference on Image Processing.Rochester,New York,USA:IEEE Press,2002:22-25.
[5]  Privitera C M,Stark L W.Algorithm for defining visual Region-of-Interest:comparison with eye fixations[J].IEEE Transactions on Pattern Analysis and Machine Intelligence,2000,22(9):970-982.
[6]  Li Ziyin,Zhu Shanan,Liu Lifang.ROI-codec-supported adaptive rate control algorithm[J].Opto-Electronic Engineering,2005,33(4):105-110.[李子印,朱善安,刘丽芳.支持ROI优先编码策略的自适应码率控制算法[J].光电工程,2006,33(4):105-110.]
[7]  Chen Gang,Dai Lirong.An improved ROI sealable coding scheme based on FMO[J].Computer Simulation,2007,24(1):101-106.[陈刚,戴礼荣.一种利用FMO特性实现ROI可伸缩编码的方法[J].2007,24(1);101-106.]
[8]  Lu Zhongkang,Li Zhenggno.JVT-0056:Perceptual Region-of-interest(BOI)based Scalable Video Coding[R].Busan,Koream:Joint Video Team,2005.
[9]  Juyant N.Signal compression:Techology targets and research directions[J].IEEE Journal of Select Areas Communication,1992,10:314-323.
[10]  Gershon B.An analytical derivation of visual nonlinearity[J].IEEE Transations on Biomedical Engineering,1980,27(5):237-242.
[11]  Stark L W,Choi Y.Experiment Metaphysics:The seanpath as an eplstemological mechanism[C]//Advance in Psychology:Visual Attention and Congition.Amsterdam,Netherland:Elsevier Science,1996:3-69.

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