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ISCAS 2001. The 2001 IEEE International Symposium on Circuits and Systems (Cat. No.01CH37196)

DOI: 10.1109/iscas.2001.921995

Institute of Electrical and Electronics Engineers, IEEE Transactions on Circuits and Systems for Video Technology, 6(12), p. 558-565, 2002

DOI: 10.1109/tcsvt.2002.800326

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Wireless video transport using conditional retransmission and low-delay interleaving

Journal article published in 1970 by Supavadee 1. Aramvith, Supavadee Aramvith;Chia-Wen Lin;Ming-Ting Sun, Ming-Ting Sun, Chia-Wen Lin ORCID, Sumit Roy, Ming-Ting Sun
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Abstract

電機工程學系 ; We consider the scenario of using Automatic Repeat reQuest (ARQ) retransmission for two-way low-bit-rate video communications over wireless Rayleigh fading channels. Low-delay constraint may require that a corrupted retransmitted packet not be retransmitted again, and thus there will be packet errors at the decoder which results in video quality degradation. We propose a scheme to improve the video quality. First, we propose a low-delay interleaving scheme that uses the video encoder buffer as a part of interleaving memory. Second, we propose a conditional retransmission strategy that reduces the number of retransmissions. Simulation results show that our proposed scheme can effectively reduce the number of packet errors and improve the channel utilization. As a result, we reduce the number of skipped frames and obtain a peak signal-to-noise ratio improvement up to about 4 dB compared to H.263 TMN-8