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CLC number: TN919.81

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Received: 2005-11-21

Revision Accepted: 2006-03-09

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.10 P.1695-1701


Unequal Forced-Intra-Refresh for robust video streaming

Author(s):  LIU Hao, ZHANG Wen-jun, YANG Xiao-kang

Affiliation(s):  Institute of Image Communication and Information Processing, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding email(s):   liu_hao@sjtu.edu.cn

Key Words:  Video streaming, Error propagation, Intra refresh, Packet loss resilience, Group of pictures (GOP)

LIU Hao, ZHANG Wen-jun, YANG Xiao-kang. Unequal Forced-Intra-Refresh for robust video streaming[J]. Journal of Zhejiang University Science A, 2006, 7(10): 1695-1701.

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T1 - Unequal Forced-Intra-Refresh for robust video streaming
A1 - LIU Hao
A1 - ZHANG Wen-jun
A1 - YANG Xiao-kang
J0 - Journal of Zhejiang University Science A
VL - 7
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SP - 1695
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PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.2006.A1695

For video streaming over lossy channels, intra refresh can mitigate the error-propagation effect caused by packet losses. Besides some intra-mode macroblocks (MBs) generated by the “Lagrangian rate-distortion” or “Sum of absolute difference” mode decision, the encoder or transcoder possibly needs to increase some “forced” intra-mode MBs for robust video streaming. Based on the error-propagation analysis in a group of pictures (GOP), we propose an unequal Forced-Intra-Refresh (FIR) scheme to improve packet loss resilience of video streaming. According to a GOP-level error-propagation model, the proposed unequal FIR scheme can optimally increase the unequal number of forced intra-mode MBs for different frames in a GOP. Simulation results showed that the proposed scheme can effectively enhance the robustness of video streaming under different channel conditions, and achieve about 0.1~0.9 dB gains over the average FIR scheme in H.264/AVC tools.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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