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Front. Inform. Technol. Electron. Eng.  2013, Vol. 14 Issue (5): 374-382    DOI: 10.1631/jzus.C1200333
    
Statistically uniform intra-block refresh algorithm for very low delay video communication
Rui Song, Yang-li Wang, Ye Han, Yun-song Li
State Key Laboratory of Integrated Service Networks, Xidian University, Xi\'an 710071, China
Statistically uniform intra-block refresh algorithm for very low delay video communication
Rui Song, Yang-li Wang, Ye Han, Yun-song Li
State Key Laboratory of Integrated Service Networks, Xidian University, Xi\'an 710071, China
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摘要： This paper focuses on the mechanism underlying the overall delay of a real-time video communication system from the time of capture at the encoder to the time of display at the decoder. A detailed analysis is presented to illustrate the delay problem. We then describe a statistically uniform intra-block refresh scheme for very low delay video communication. By scattering intra-blocks uniformly into continuous frames, the overall delay is significantly decreased, and object changes in the scene could be presented to the end user instantly. For comparison, the overall delay and the peak signal-to-noise ratio (PSNR) performance are tested. The experiment results show that an average of approximately 0.1 dB PSNR gain on average is obtained relative to random intra-macroblock refresh algorithm in H.264 JM, and the end-to-end delay performance is significantly improved.
关键词： Video coding;  Intra refresh;  Low delay    
Abstract: This paper focuses on the mechanism underlying the overall delay of a real-time video communication system from the time of capture at the encoder to the time of display at the decoder. A detailed analysis is presented to illustrate the delay problem. We then describe a statistically uniform intra-block refresh scheme for very low delay video communication. By scattering intra-blocks uniformly into continuous frames, the overall delay is significantly decreased, and object changes in the scene could be presented to the end user instantly. For comparison, the overall delay and the peak signal-to-noise ratio (PSNR) performance are tested. The experiment results show that an average of approximately 0.1 dB PSNR gain on average is obtained relative to random intra-macroblock refresh algorithm in H.264 JM, and the end-to-end delay performance is significantly improved.
Key words: Video coding    Intra refresh    Low delay
收稿日期: 2012-11-23 出版日期: 2013-04-30
CLC:  TN919  
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Rui Song
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Rui Song, Yang-li Wang, Ye Han, Yun-song Li. Statistically uniform intra-block refresh algorithm for very low delay video communication. Front. Inform. Technol. Electron. Eng., 2013, 14(5): 374-382.

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http://www.zjujournals.com/xueshu/fitee/CN/10.1631/jzus.C1200333    或    http://www.zjujournals.com/xueshu/fitee/CN/Y2013/V14/I5/374

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