Statistically uniform intra-block refresh algorithm for very low delay video communication

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-b...

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Bibliographic Details
Published in:Frontiers of information technology & electronic engineering 2013-05, Vol.14 (5), p.374-382
Main Authors: Song, Rui, Wang, Yang-li, Han, Ye, Li, Yun-song
Format: Article
Language:English
Subjects:
Algorithms
Communications Engineering
Communications systems
Computer Hardware
Computer Science
Computer Systems Organization and Communication Networks
Delay
Electrical Engineering
Electronics and Microelectronics
Instrumentation
Networks
Signal to noise ratio
Video communication
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Summary: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 in- tra-blocks uniformly into continuous frames, the overall delay is significantly decreased, and object changes in the scene could bc 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.
ISSN:1869-1951
2095-9184
1869-196X
2095-9230
DOI:10.1631/jzus.C1200333