高性能异步任意速率采样率转换器  

High PerformanceAsynchronous Arbitrary-Rate Sampling Rate Converter

作　　者：瞿军武 薛骏 施彦 QU Jun-wu;XUE Jun;SHI Yan(Wuxi Zgmicro Microelectronics Co.,Ltd.)

机构地区：[1]无锡中感微电子股份有限公司

出　　处：《中国集成电路》2020年第9期23-28,51,共7页China lntegrated Circuit

摘　　要：采样率转换处理是用于改变已知数字化的离散信号采样率的一种很常用的方法。本文介绍一种高精度异步采样率转换器的实现方法,可以实现将任意采样率的音频输入信号重采样为已知的采样率的输出音频信号。可以满足在声纹识别和音频处理中对不同采样率的要求。本异步采样率转换器基于传统的滤波器、多相滤波器的思想,结构简单,性能优越,使用灵活方便。该异步重采样算法已经在语音识别和音频处理芯片中成功应用。Sampling rate conversion is a very common method used to change the sampling rate of known digital discrete signals.This paper introduces a high-precision asynchronous sampling rate converter,which can resample the audio input signal of any sampling rate into the output audio signal of known sampling rate.It can meet the requirements of different sampling rates in voiceprint recognition and audio processing.Based on the idea of traditional filter and poly-phase filter,the asynchronous sample rate converter has the advantages of simple structure,superior performance and flexible and convenient use.The asynchronous resampling algorithm has been successfully applied in speech recognition and audio processing chips.

关 键 词：采样率转换 FIR滤波器 多相滤波 拉格朗日 插值 总谐波+噪声 FPGA 

分 类 号：TN792[电子电信—电路与系统] TN713