弦乐合弦声信号时频特征的小波包分析  

Analysis of Time-frequency Domain Characteristics of String Music Chord Sound Based on Wavelet Packet Technique

作　　者：李功宇 郑华文[1] 胡持平[1] 

机构地区：[1]昆明理工大学机电工程学院,云南昆明650093

出　　处：《昆明理工大学学报（理工版）》2003年第4期36-39,共4页Journal of Kunming University of Science and Technology(Natural Science Edition)

摘　　要：利用小波包分析技术对弦乐合弦声信号进行时频分析 ,并采用Hilbert变换对小波分解系数时域重构信号进行包络线检波 ,得到了合弦声信号幅值的时频等高线相平面图 .与传统傅里叶谱分析技术相比较 ,小波变换的时频相平面图能同时反映合弦声信号的构成频率成分及其时域特征 .The musical chord sounds, played by a guitar, are analyzed on time-frequency domain based on the wavelet packet method. Compared with the traditional Fourier Transform, the wavelet time-frequency images, which reflects time & frequency characteristics of signals simultaneously, are more suitable for analyzing signals with time variant characteristics.

关 键 词：小波包分析 时频分析 HILBERT变换 合弦声信号 弦乐 吉它 频率 傅里叶谱分析 信号重构 

分 类 号：TN912.3[电子电信—通信与信息系统]