基于DSP的音频信号采集与传输系统设计
硬件电路并详细论述了软件系统的设计与实现方案。
在硬件电路概述部分，主要介绍了音频采集处理及传输系统所使用的一些电路模块，包括DSP最小系统模块、音频信号的模数和数模转换模块、SRAM扩展模块和网络通信模块。在软件设计部分，介绍了与硬件模块相对应的软件模块的设计。详细说明了加窗FIR滤波器的基本原理、频谱特性、MATLAB的设计方法以及
在DSP上的实现方法。另外，还介绍了音频编解码器TLV320AIC23、网络控制器RTL8019AS、DSP芯片以及McBSP的初始化流程及方法。
在论文的最后对系统硬件和软件进行了调试，并对研究结果进行了总结分析。19254
关键字 DSP 信号采集 滤波器 网络通信
毕业论文设计说明书（论文）外文摘要
Title The design of audio signal acquisition and transmission system based on DSP.
Abstract
As it is known to all,information received from hearing is just less than that received from seeing. In our daily life and industrial production,there is much information in audio signal,so it has important practical significance to monitor audio signal. This paper takes use of the development board of DSP to design a audio signal acquisition and transmission system,mainly including the introduction of hardware circuit ,and the design and realization of the software system.
The section of introducing hardware circuit is abort several circuit modules the system use,including the DSP minimum system module,acquisition and transmission module,SRAM expansion module and network communication module.The section of software design complete the design of software module correspond with hardware circuit module.In the part of designing FIR filter,this paper minutely present its fundamental principle ,frequency spectrum characteristics,the design in matlab and the way of realization in DSP.In addition,the process and method of initialing DSP,McBSP,TLV320AIC23 and RTL8019AS is also included in this paper.
The end part of this paper debug the hardware circuit modules and software modules,and analysis the results at the same time.
Keywords DSP,signal acquisition,filter,network communication
目 次
1 绪论 1
1.1论文选题背景 1
1.2研究目的与意义 1
1.3论文主要内容 2
2 系统硬件概述 3
2.1硬件总体概述 3
2.2 DSP最小系统模块 4
2.2.1电源电路 4
2.2.3时钟电路 4
2.2.4 JTAG接口电路 6
2.3音频采集与传输模块 7
2.4 SRAM存储器扩展模块 8
2.5网络通信模块 9
3 软件设计与实现 11
3.1 CCS简介 11
3.2 音频信号采集与回放程序 11
3.2.1 DSP 5402初始化 12
3.2.2 McBSP初始化 13
3.2.3 AIC23初始化 14
3.2.4音频信号采集与回放 15
3.3 滤波器的设计与实现 17
3.3.1 FIR滤波器原理 17
3.3.2 Blackman窗函数 18
3.3.3 FIR滤波器设计 19
3.3.4 FIR滤波器的实现 20
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