一种基于临界带宽的新小波包变换算法  

New wavelet packet transform algorithm based on critical bandwidth

作　　者：李杰[1] 刘贺平[1] 

机构地区：[1]北京科技大学信息工程学院,北京100083

出　　处：《计算机工程与应用》2012年第14期5-7,89,共4页Computer Engineering and Applications

基　　金：国家自然科学基金(No.10671011);北京市教委重点学科共建项目(No.XK100080537)

摘　　要：针对传统语音短时分析技术容易出现丢失信息的现状,提出了一种基于临界带宽的小波包变换算法,该算法借鉴传统倒谱特征参数(MFCC)提取的过程并在该过程中引入临界带宽(Critical Bandwidth)的概念。在基于高斯混合模型的说话人识别系统中进行实验,结果表明在选取不同小波包函数的情况下,该算法所取得的识别率较MFCC参数均有提高。To solve the problem of information loss under the traditional short-time analysis,a new wavelet packet transform algorithm based on the critical bandwidth is presented.The algorithm utilizes the process of MFCC parameters extraction with the introduction of the concept of critical bandwidth.Based on the GMM speaker recognition system,the experimental results show the performance of the proposed algorithm is better than that of the traditional MFCC parameters in the condition of different wavelet packet functions.

关 键 词：特征提取 小波包变换 临界频带 Mel频率倒谱系数(MFCC) 

分 类 号：TN912[电子电信—通信与信息系统]