Block-Based SPIHT for Multiple Description Image Transmission

• Main Authors: Ming-Zhu Luo, 羅名助
• Other Authors: Shang-Chih Ma
• Format: Others
• Language: zh-TW
• Published: 2003
• Online Access: http://ndltd.ncl.edu.tw/handle/93v2sj

碩士 === 中原大學 === 電機工程研究所 === 91 === The objective of the thesis is to present the block-based algorithm for multiple description image transmission. In this algorithm, the wavelet coefficients of the image to be delivered are partitioned into different groups including the low-pass and high-pass subbands. Then, the groups of high-pass subband are divided with block-based algorithm. The wavelet coefficients in each block and the group of low-pass subband are independently encoded using the set partitioning in hierarchical trees (SPIHT) technique. The decoders of the transmission system can reconstruct the image by collecting the SPIHT-encoded bitstreams from any wavelet coefficients. Compare to equal-allocation algorithm, our simulation demonstrates that it can attain comparable performance for lossless channels. Furthermore, Our algorithm outperforms the basic SPIHT when the channels become lossy.