基于DSP Builder的二维提升小波变换实现  

Implementation of Discrete Wavelet Transform Based on Lifting Scheme with DSP Builder

作　　者：郭欣[1] 王超[1] 曹鹏[1] 陆燕[1] 

机构地区：[1]东南大学国家专用集成电路系统工程技术研究中心,南京210096

出　　处：《电子器件》2007年第5期1708-1711,共4页Chinese Journal of Electron Devices

摘　　要：离散小波变换在图像压缩处理中有着重要的作用,并得到了广泛的应用.与传统的基于卷积的架构相比较,基于提升的架构具有需要较少的硬件资源,占用较少的芯片面积等优点.在DSP Builder中实现了基于提升的一维离散小波变换,并通过构造相关的存储器控制逻辑,完成了二维离散小波变换架构的设计.利用该架构对图像进行离散小波变换,与软件变换的结果相比较,并计算出图像的峰值信噪比,验证了其正确性.The discrete wavelet transform(DWT) has gained wide application in image compression algorithms.Comparing with the architectures based on convolution,DWT implementation based on Lifting Scheme requires far fewer computations and offers many other advantages.This paper proposes a 1-D DWT implementation based on Lifting Scheme and further constructs a memory management unit to implement 2-D DWT with DSP Builder.We decomposed images with the 2-D DWT based on lifting scheme and reconstructed them by software.At...

关 键 词：离散小波变换 提升架构 SIMULINK DSP BUILDER 

分 类 号：TN911.73[电子电信—通信与信息系统]