信号的广义时频表示

研究出一种真正的非平稳信号分析方法，用时频图表示非平稳信号的的动态频谱，经历了四十多年丰富多彩的发展，终于在最近几年中取得了重要进展，并与小波理论相结合，形成了能概括大部分重要分布的统一理论框架，称为广义时频表示，本文概述和评论广义时频表示的最新研究成果，并以语音信号的时频表示为例，论述了它的广阔应用前景。

Generalized Time-Frequency Representation of Signals

The exploration of a real method to analyze non-stationary signals and devising a time-frequency representation of signals have steadily developed over the last 40years,and there have recently been significant advance.Moreover,combined with the.wavelet theory,it has initially been developed into a unifying framework,called as the generalized time-frequency representation(GTFR),which includes the most important distributions.This paper reviews the GTFR and describes the potential of its wide applications by taking some examples of speech analysis.