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| Efficient Multiple Description Image Coding over Error-Prone Channels Based on Frame Expansion |
| Zhao Xiao-qing; Ni Lin |
| Department of Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China |
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Abstract Multiple description image coding based on quantized frame expansion performs very well over error-prone channels. In this paper, an efficient multiple description image coding based on frame expansion is proposed. Firstly, an optical uniform tight frame is designed, which can minimize the mean squared error with quantization. Then, basic unit of frame expansion is constructed from wavelet zerotrees and different frames are applied to coefficients in different sub-bands. In that way, different sub-bands gain different protections during the transmission. After quantization and entropy coding, multiple description bit streams are generated from frame expansion. The experiment results prove that compared with other methods based on frame expansion, the scheme can obtain better recovery images under the same channel condition.
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Received: 23 January 2007
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2008, Vol. 30 
