Abstract: A new method for combining source channel coding with source modeling and network congestion control for reliable video transmission over a wireless network is proposed. Based on the scene modeling and characteristic analysis, all layers encoded by MPEG-4 scalable coding are first classified into several types. Second, unequal loss protection and unequal error protection of queues are made according to their contribution to the quality of reconstructed video. Then the network congestion control strategy is adjusted according to different packet loss rates, and the rates between source coding and channel coding are dynamically adjusted according to BER in wireless channel. Finally, the experimental results show that the proposed scheme can achieve better performance compared with conventional schemes under various wireless network conditions.

Key words: scene modeling, scalable coding, unequal error protection, unequal loss protection, joint source-channel coding