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摘要语音作为一种具有最大化信息储量和消息内涵以及最高的智能水平的形式已经深入到人们日常生活和工业生产领域的各个方面。数字信号处理技术在当今科学技术发展飞速的现在，也在进行高速的发展。目前将语音和数字信号处理技术结合起来是一种重点研究领域，包括语音分析，语音识别，语音采集和存储等多个研究方向。在对语音信号的实时性，精确性和大数据具有越来越高要求的如今，长时间语音信号的处理显得尤为重要。而长时间语音信号处理更加要求处理器具有很高的性能。DSP（数字信号处理器）以其精确性，实时性和可靠性以及具有丰富的片上外设等优点脱颖而出。采用 DSP 进行长时间语音信号处理是未来重要的一种发展方向。在此基础上，本文设计实现了一种基于DSP 的长时间语音信号采集和存储系统。 本文以模块化的思想，自顶而下的对该系统进行了设计分析。首先分析了总的设计方案，包括采用的 TMS320C6713 系列的 DSP 体系框架，采集部分和存储部分采用的各个芯片描述。在此基础上，进一步详细分析各个模块方案设计，即语音采集模块和 USB传输模块的具体设计实现， 编写TMS320C6713 程序控制USB芯片和语音信号采集芯片，实现数据实时采集与传输，通过计算机USB接口的接收数字语音信号，并分析 BULK模式数据的传输性能，详细给出了AD语音信号采集模块和 USB模块的分模块仿真实测结果以及给出了整个系统实验实际测量结果数据和仿真图。最后，本文对如何丰富和改进系统提出了建议和改进措施以及未来展望。27390
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毕业论文关键词 语音信号处理 TMS320C6713 系列DSP USB2.0 AD采样
Title Long-time speech signal acquisition and memory system design based on DSP
Abstract As a form of message with maximized connotation and the highest level of intelligence，speech has been deep covered in all aspects of people’s daily life and industrial production fields. With the development of science，DSP is now under rapid improvement. Currently，there is a significant field which is the combination of speech and DSP，included with multiple studies speech analysis，speech recognition，speech acquisition， and storage directions. Speech signal is needed elevation for its timeliness，exactness and reliability. So，It is also essential to raise the ability of processors. Consequently，Long-time speech signal acquisition and storage is a major problem at present. Firstly，the entire design is analyzed with the TMS320C6713 series framework and chips over the system all included. Secondly，Design of each module is analyzed，such as acquisition module and memory module. Afterwards，TMS320C6713 program is designed to control the USB chip and sampling chip which can realize the collection and transmission of data. Digital speech has been received by computer USB interface，then，data transmission performance of BULK mode also has been analyzed. Thirdly，Simulation experimental results of AD speech signal module and USB module has been described in this paper. Finally，the last part of the paper provides some suggestions to improve the system，and the future of the system. Keywords Voice Signal Processing TMS320C671 series DSP USB2.0 AD Sampling
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1 引言 … 1
1.1 课题背景阐述 … 1