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Multi-stages hybrid ARQ with conditional frame skipping and reference frame selecting scheme for real-time video transport over wireless LAN

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2 Author(s)
Min Chen ; Dept. of Electron. & Commun. Eng., South China Univ. of Technol., Guangzhou, China ; Gang Wei

This paper proposes a multi-stages hybrid ARQ/FEC scheme with frame skipping, reference frame selecting and intra-frame refreshing techniques for H.26L real-time video streaming over WLAN. In this paper, adaptive ARQ/FEC is adopted to save unnecessary FEC overhead; conditional frame skipping is adopted to avoid ETE delay inflation due to MAC ARQ/FEC error recovery; reference frame selecting is adopted to save bandwidth; intra-frame refreshing is adopted to prevent residual error propagation among consecutive frames. Through analysis and simulation, we show that multi-stages hybrid ARQ scheme has the following key properties: (1) high error recovery rate for real-time video frames, (2) excellent sea/ability, (3) high transmission efficiency. In case of severe unreliable channel, which causes losing a lot of IP packets, we obtain a peak signal-to-noise ratio improvement up to about 10 dB compared to the hybrid ARQ proposed in [A. Majumdar et al., June 2002].

Published in:

IEEE Transactions on Consumer Electronics  (Volume:50 ,  Issue: 1 )