Journal of Visual Communication and Image Representation
Optimized H.264/AVC-based bit stream switching for mobile video streaming
EURASIP Journal on Applied Signal Processing
Cross-layer conditional retransmission for layered video streaming over cellular networks
Computer Communications
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Most of current video retrieval systems use video transfer protocols such that servers simply transmit video packets in the same rate as clients play them. If any packets are corrupted during transmission, they will be lost and cannot be recovered by retransmission. In video retrieval systems, however, the video data are stored in servers and clients can prefetch them prior to playing. So, it might be possible for the video retrieval systems to make corrupted video packets retransmitted before play-out dead line. But the application of existing reliable protocols causes problems such that, if a packet does not arrives before the dead line due to retransmission, the packets following it will not be delivered to the upper layer even if they have already arrived. In this paper, we proposed a new video transfer protocol for video retrieval systems over ATM network, which provides the video data prefetch, the flow control for video buffer, the selective retransmission with skipping function for video packets late for the play-out dead line, and the resynchronaization function for video buffer. We have implemented an experimental system using our protocol and evaluated the performance. The results of performance evaluation shows that the proposed protocol decreases the number of unplayed video data to less than 1/70 compared with the conventional non-retransmission protocol when random bit errors with BER of 1E-6 are inserted in an ATM network. Keywords : Protocol, Video, Retrieve, Prefetch, Retransmission, ATM, SSCOP