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With content delivery networks (CDN) techniques, a new approach to multiple description video scalable coding is proposed using 3D wavelet decomposition based on polyphase downsampling. A video source is divided into four balanced descriptions, which are distributed across the edge servers in the CDN, and each description is independently encoded using a 3D set partitioning in hierarchical trees algorithm. At the receiver, different post-processing methods of error concealment are used to obtain reconstructed video with high quality from the received descriptions, even if only one description is received. The proposed approach avoids the mismatch problem in multiple description video coding (MDVC), and it has high scalability and can improve the robustness of video transmission over unreliable networks. Experimental results show that the proposed scheme is feasible and effective.
Date of Conference: 28-30 May 2005