A robust resolution-enhancement scheme for video transmission over mobile ad-hoc networks

作者：Zhou, Liang^*; Zheng, Baoyu; Wei, Anne; Geller, Benoit; Cui, Jingwu

来源：IEEE Transactions on Broadcasting, 2008, 54(2): 312-321.

DOI：10.1109/TBC.2008.917746

• error-resilient
• mobile ad-hoc networks
• resolution-enhancernent
• super-resolution

Historically, Error-Resilient (ER) video transmission and Super-Resolution (SR) image reconstruction techniques have evolved separately. In this paper, we propose a coordinated application of ER and SR to enhance the resolution of image transmitted over mobile ad-hoc networks. In order to combat error propagation, a flexible multiple description coding method based on shifted 3-D SPHIT (3-D Set Partitioning In Hierarchical Trees) algorithm is presented to generate variable independent descriptions (substreams) according to the network condition. And then, a novel unequal error protection strategy based on the priority level is provided to assign a higher level of error protection to more important parts of bitstream. Moreover, a robust SR algorithm is proposed in the presence of different kinds of packet loss rate to enhance the image resolution. Experimental results indicate that the proposed robust resolution-enhancement scheme outperforms the competing methods from the aspects of PSNR (Peak-Signal-to-Noise Ratio) and visual quality under different packet loss rates.

• 出版日期2008-6
• 单位上海交通大学; 南京邮电大学