Joint Multiple Description Coding and Network Coding for Wireless Image Multicast
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.
Yuanyuan Xu Ce Zhu
School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore
国际会议
The Fifth International Conference on Image and Graphics(第五届国际图像图形学学术会议 ICIG 2009)
西安
英文
819-823
2009-09-20（万方平台首次上网日期，不代表论文的发表时间）