Design and Implementation of a Progressive Image Compression Codec System with 2D Shape Adaptive Lifting Wavelet Transform

• Main Authors: Shi-Shen Wang, 王旭昇
• Other Authors: Yin-Tsung Hwang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/82736950718987904834

碩士 === 國立雲林科技大學 === 電子與資訊工程研究所碩士班 === 90 === Object-based coding technology is the main stream of the research for visual coding in the furture. In the emerging standard, MPEG-4, Shape-Adaptive Discrete Wavelet Transform (SA-DWT) has been adopted for arbitrary shaped texture coding. No hardware architecture for SA-DWT had been proposed. In this thesis, an efficient algorithm and its VLSI architecture design for a progressive image codec system, in which the image transforms through lifting based SA-DWT with Daubechies (9,7) biorthogonal filter and then the coded by our new proposed the modify SA-SPIHT algorithm. In our 1-D lifting SA-DWT architecture perform whole frame that regard as continuous several line segments and solve every segment boundary extension problem easier than conventional convolution based DWT. Besides, the proposed architecture that can be perform both forward and inverse transforms. We also modify the SPIHT algorithm and additive arbitrary shape adaptive technique to reach very low complexity VLSI architecture and higher performance than conventional SPIHT algorithm, in which experimental results indicate the proposed algorithm can achieve better coding efficiency. Verilog code is used to describe the hardware architecture, through the TSMC 0.35um 1P4M process and testing, this chip is proven to be function work.