广义滤波器组变换及其实现

THE GENERALIZED FILTER BANK TRANSFORM AND ITS REALIZATIONS

本文首先以语音子频带编码为例,说明用滤波器组完成信号时间一频率二维表示的意义。在广义滤波器组变换的基本原理基础上阐述了三种具有不同特点的分析-综合系统。文中对假频抵消、滤波器设计、系统性能及实现方式等问题也进行了分析。

In this paper, the significance of Time-Frequency representation of signals is illustrated with the subbandcoding for speech as an example.Based on the fundamental theory of generalized ?llter bank transform, threeanalysis/synthesls systems with different properties are discussed. The problems for aliasing cancelling,filterbank design, system performance and realization methods are also analysed.