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標題Title: Joint Multiple Description Coding and Network Coding forWireless Image Multicast
作者Authors: 黃群凱
上傳單位Department: 資訊工程系
上傳時間Date: 2012-1-9
上傳者Author: 黃群凱
審核單位Department: 資訊工程系
審核老師Teacher: 許子衡
檔案類型Categories: 研究生論文報告Thesis
關鍵詞Keyword: Multiple description coding,Network Coding
摘要Abstract: Multiple description coding (MDC) is an effective technique to combat transmission loss over unreliable lossy networks. Network coding which allows coding at the intermediate nodes in the network promises to increase throughput of the whole network and better utilizes network resources. To provide both robustness and efficiency for image multicast over wireless ad hoc networks, a scheme based on joint multiple description coding (MDC) and network coding is proposed in this paper. Multiple description lattice vector quantization (MDLVQ) is employed to encode an image at the source node, and different descriptions are transmitted on an individually or mixed base. Linear network coding is used to mix selected packets at the intermediate nodes provided that corresponding receivers can decode the mixed packet. At the destination nodes, received original packets and mixed packets can result in a reproduction with certain quality. Experimental results validate that the proposed scheme can benefit the image transmission with better reconstructed image quality, lower failure rate and less energy consumptions.

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2012_1_a56a0d2d.ppt 3080Kb ppt 148 110
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