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研究生: 張誌偉
Chang, Chi-Wei
論文名稱: 應用於Lifting離散小波轉換新式區塊結構之硬體設計
Novel Block-Based Architectures for Lifting Scheme Discrete Wavelet Transform
指導教授: 王駿發
Wang, Jhing-Fa
學位類別: 碩士
Master
系所名稱: 電機資訊學院 - 電機工程學系
Department of Electrical Engineering
論文出版年: 2003
畢業學年度: 91
語文別: 英文
論文頁數: 74
中文關鍵詞: 離散小波轉換區塊結構
外文關鍵詞: architectures, block-based, wavelet, lifting
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  • The Discrete Wavelet Transform (DWT) has been used in image processing for the past few years. 2-D DWT architectures can be classified into line-based and block-based architectures. Line-based architectures are simple with low complexity. They are efficient for 1-D applications. In case of 2-D transforms (or higher), they suffer from two main problems: memory requirements and latency. These problems are inherent to line-based architectures. In this thesis, a novel block-based architecture for computing the lifting-based 2-D DWT coefficients is presented. These architectures make the significant reduction of buffer size and speeds up the calculation of 2-D wavelet coefficients as compared with those line-based fashion architectures. In addition, the proposed architecture supports the JPEG2000 default filters. Compared to the line-based architectures, the latency is reduced from N2 down to 3N. Finally, the architecture has been realized in ARM-based ALTERA EPXA10 Development Board with frequency at 44.33MHz.

    ABSTRACT I ACKNOWLEDGMENT IV LISTS OF TABLES IV LISTS OF FIGURES V CHAPTER 1 INTRODUCTION 1 1.1 Background 1 1.2 Motivation 1 1.3 The Existing Architectures 4 1.4 Thesis Organizations 5 CHAPTER 2 WAVELET ANALYSIS 6 2.1 Why wavelets 6 2.2 Discrete Wavelet Transform (DWT) 8 2.3 Lifting scheme 14 CHAPTER 3 PRECISION ANALYSIS 21 3.1 Numerical Analysis 21 3.2 Boundary treatment 27 CHAPTER 4 PROPOSED VLSI ARCHITECTURES 29 4.1 The Proposed Data Flow Diagram 29 4.2 The Proposed Architectures 32 4.2.1 The block controller modules 33 4.2.2 The processor elements (PE) modules 38 4.2.3 The memory modules 42 4.3 Scheduling 44 4.4 Comparisons 46 CHAPTER 5 EXPERIMENT RESULTS 48 5.1 Design Flow and Strategy 48 5.2 FPGA Implementation 49 5.3 Simulation Results 51 5.4 Chip Features 53 CHAPTER 6 CONCLUSIONS 57 REFERENCES………………………………………………………………58

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