文档介绍：西安电子科技大学
硕士学位论文
数字音频设备的控制及嵌入式网络模块的设计与实现
姓名:张柯
申请学位级别:硕士
专业:电路与系统
指导教师:冯小平
20100101
摘要
近年来,我国音频监控系统发展很快,数字音频监控系统在广播领域担当着
越来越重要的角色,数字信号也逐步取代了传统的模拟信号。因此,基于嵌入式
系统的监控技术由于其应用的广泛性和和巨大的市场前前景也正成为热门的研究方
向。
本文针对广播发射机数字音源的自动动监测和和切换,给出了一种基于 Blackfin
系列 DSP 芯片的数字音频监控系统。该系统适用于广播电台音频节目制制作、传输
通路的多路音频信号监控,专业音频设备应用系统中进行多路信号监控和和专业音
响响工程中多路音频信号的监控等多种应用场合。
论文首先介绍了数字音频广播的发展及数字音频监控系统的特点,并在此基
础上研究了数字音频信号的来源、数字音频接口标准、AES/EBU 及其接口等相关
基础理论,然后,详细阐述了系统的软、硬件设计。硬件设计介绍了系统的控制制
板的两个模块的设计即控制制模块和和嵌入式网络模块,详细介绍了芯片之间的连接,
主要应用芯片为 CS8420 、DSP 、CPLD 、和和 LAN91C111 ,软件设计详细介绍了 TCP/IP
堆栈移植、基于 VDK 的网络通信程序的实现。文章的最后介绍了系统的测试过程
及工作流程。

关键词:数字音频监控嵌入式以太网数字信号处理器
Abstract
In recent years, audio monitoring systems are developing rapidly in China. Digital
audio monitoring systems play an important role in the area of broadcasting, and digital
signals are also replacing the traditional analog signals gradually. Therefore, the
monitoring technology based on embedded system application is ing a hot topic
for its wide application and enormous market potential.
A digital audio monitoring system based on series of Blackfin DSP chips for
automatic monitoring and switching of digital audio broadcasting transmitter is
proposed. The system is applied to production and transmission of the audio radio
program, monitoring of access multi-channel audio signal, monitoring of multi-channel
signal of professional audio equipment application systems, and monitoring of
multi-channel audio signal of professional sound engineering and so on.
Firstly the development and the status of digital audio radio are introduced. The
source of digital audio signals, the standard of digital audio interface, AES/EBU and its
interface as well as other related basic theories are presented. Then the design details of
this system hardware and software are given. Design of the system hardware includes
two modules of the control prised of the control module and the embedded
network module