采样率可变的连续语音采集系统的设计

Design of a Sampling-Rate Changeable Collection System for Continuous Speech

本文提出了一种高性能语音信号采集系统方案,采用“双体共享存贮器”方法,可获得任意长度连续语音的采集和重放。并采用高集成度的开关电容滤波器,系统的采样频率和反混迭滤波器的截止频率可在一定范围内任意给定。整个系统软件设计灵活,硬件设计合理,可方便地应用于语音研究的各个方面。

A new system scheme for speech signal collection is presented. It can be realized to collect and playback the continuous speech of arbitrary length by using the 'Dual-Shared Memory' (DSM) method. Using the highly-integrated Switch-Capacitor filter,the sampling rate and the cut-off frequency of the anti-alias filter can be arbitrarily selected within some range. The whole system thus has the property of flexible software and suitable hardware and can be applied to many fields of speech research.