| JPEG2000中DWT的结构优化 |
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| 引用本文： | 钟艳华,辛勤,楼生强. JPEG2000中DWT的结构优化[J]. 微处理机, 2011, 32(4): 46-48. DOI: 10.3969/j.issn.1002-2279.2011.04.013 |
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| 作者姓名： | 钟艳华 辛勤 楼生强 |
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| 作者单位： | 国防科技大学电子科学与工程学院,长沙,410073 |
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| 摘 要： | 详细分析了JPEG2000标准提升算法,对标准提升算法进行了改进。对小波系数进行翻转处理,并采用CSD编码,用移位加操作实现常系数乘法器,并对舍入误差进行了分析。将提升步骤进行合并,整个结构采用流水线模式。提出了一种有效的并行VLSI结构,提高了处理速度,增加了硬件资源利用率。
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| 关 键 词： | 离散小波变换 提升算法 舍入误差 |
Architecture Optimization for Discrete Wavelet Transform in JPEG2000 |
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| ZHONG Yan-hua,XIN Qing,LOU Sheng-qiang. Architecture Optimization for Discrete Wavelet Transform in JPEG2000[J]. Microprocessors, 2011, 32(4): 46-48. DOI: 10.3969/j.issn.1002-2279.2011.04.013 |
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| Authors: | ZHONG Yan-hua XIN Qing LOU Sheng-qiang |
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| Affiliation: | ZHONG Yan-hua,XIN Qing,LOU Sheng-qiang(Department of Electronic Science and Engineering,National University of Defense Technology,Changsha 410073,China) |
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| Abstract: | The standard lifting algorithm of JPEG2000 is analyzed and modified.The wavelet coefficients adopt CSD coding after flipping.Shift-add operations are adopted to implement multiplier with a constant coefficient.This paper analyses the roundoff error,modifies the lifting step and adopts the pipeline design.A efficient parallel architecture is proposed to increase the transform speed and achieve higher hardware utilization. |
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| Keywords: | DWT Lifting Scheme Roundoff Error |
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