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Front. Inform. Technol. Electron. Eng.  2011, Vol. 12 Issue (2): 163-170    DOI: 10.1631/jzus.C1000008
    
Hash signature saving in distributed video coding
Xin-hao Chen1,2, Xing-guo Zhu1,2, Xiao-lin Shen1,2, Lu Yu*,1,2
1 Institute of Information and Communication Engineering, Zhejiang University, Hangzhou 310027, China 2 Zhejiang Provincial Key Laboratory of Information Network Technology, Hangzhou 310027, China
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Abstract  In transform-domain distributed video coding (DVC), the correlation noises (denoted as N) between the source block and its temporal predictor can be modeled as Laplacian random variables. In this paper we propose that the noises (denoted as N′) between the source block and its co-located block in a reference frame can also be modeled as Laplacian random variables. Furthermore, it is possible to exploit the relationship between N and N′ to improve the performance of the DVC system. A practical scheme based on theoretical insights, the hash signature saving scheme, is proposed. Experimental results show that the proposed scheme saves on average 83.2% of hash signatures, 13.3% of bit-rate, and 3.9% of encoding time.

Key words： Distributed video coding (DVC)      Hash      Laplacian     
Received: 11 January 2010      Published: 08 February 2011
CLC:  TN919.8  
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Xin-hao Chen
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Xin-hao Chen, Xing-guo Zhu, Xiao-lin Shen, Lu Yu. Hash signature saving in distributed video coding. Front. Inform. Technol. Electron. Eng., 2011, 12(2): 163-170.

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http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.C1000008     OR     http://www.zjujournals.com/xueshu/fitee/Y2011/V12/I2/163


Hash signature saving in distributed video coding

In transform-domain distributed video coding (DVC), the correlation noises (denoted as N) between the source block and its temporal predictor can be modeled as Laplacian random variables. In this paper we propose that the noises (denoted as N′) between the source block and its co-located block in a reference frame can also be modeled as Laplacian random variables. Furthermore, it is possible to exploit the relationship between N and N′ to improve the performance of the DVC system. A practical scheme based on theoretical insights, the hash signature saving scheme, is proposed. Experimental results show that the proposed scheme saves on average 83.2% of hash signatures, 13.3% of bit-rate, and 3.9% of encoding time.

关键词： Distributed video coding (DVC),  Hash,  Laplacian 
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