Method for signal decomposition and denoising based on nonuniform cosine-modulated filter banks  

作　　者：Xuemei Xie Li Li Guangming Shi Bin Peng 

机构地区：[1]School of Electronic Engineering, Xidian University, Xi＇an, Box 134, Shaanxi 710071, China

出　　处：《Progress in Natural Science:Materials International》2008年第10期1293-1298,共6页自然科学进展·国际材料（英文版）

基　　金：supported by National Natural Science Foundation of China (Grant Nos.60672125 and 60776795);Program for New Century Excellent Talents in University (NCET-07-0656).

摘　　要：In this paper, a novel method for signal decomposition and denoising is proposed based on a nonuniform filter bank （NUFB）, which is derived from a uniform filter bank. With this method, the signal is firstly decomposed into M subbands using a uniform filter bank. Then according to their energy distribution, the corresponding consecutive filters are merged to compose the nonuniform filters. With the resulting NUFB, the signal can be readily matched and flexibly decomposed according to its power spectrum distribution. As another advantage, this method can be used to detect and remove the narrow-band noise from the corrupted signal. To verify the proposed method, a simulation of extracting the main information of an audio signal and removing its glitch is given.在这篇论文，一个新奇方法为表明分解，降噪基于一个不一致的过滤器银行(NUFB ) 被建议，它从一个一致过滤器银行被导出。与这个方法，信号第一用一个一致过滤器银行被分解成 M 潜水艇乐队。然后根据他们的精力分发，相应连续过滤器被合并填写不一致的过滤器。与产生 NUFB，信号能乐意地根据它的力量光谱分发被匹配并且灵活地分解了。作为另一个优点，这个方法能被用来从贿赂信号检测并且搬迁狭窄乐队的噪音。验证建议方法，提取一个听觉的信号的主要信息并且移开它的故障的模拟被给。

关 键 词：Signal decomposition DENOISING Nonuniform filter bank Narrow-band noise 

分 类 号：TN713[电子电信—电路与系统]