兰州工业学院毕业设计说明书（论文）
摘要
让机器听懂人类的语音,这是人们长期以来梦寐以求的事情。语音识别技术就是让机器通过识别和理解过程把语音信号转变为相应的文本或命令的高技术, 语音识别是一门交叉学科，所涉及的领域有信号处理、模式识别、概率论和信息论、发声机理和听觉机理、人工智能等等。其应用领域也非常广，例如相对于键盘输入方法的语音输入系统、可用于工业控制的语音控制系统及服务领域的智能对话查询系统，在信息高度化的今天，语音识别技术及其应用已成为信息社会不可或缺的重要组成部分。
通过语音传递信息是人类最重要、最有效、最常用和最方便的交换信息形式。同时，语言也是人与机器之间进行通信的重要工具，它是一种理想的人机通信方式，因而可为信息处理系统建立良好的人机交互环境，进一步推动计算机和其他智能机器的应用，提高社会的信息化程度。
随着嵌入式技术和通信技术的发展，智能机已成为电子技术发展的主流趋势，目前在智能机领域，从处理器选型、操作系统选择以及应用程序开发都是研究的热点。本设计利用ARM处理器开发处理音频信号，通过一个ARM9芯片S3C2410作为处理器的嵌入式语音采集系统，结合LD 3320的嵌入式语音识别系统阐述了语音数据的采集与处理，采用带汉字库的12864显示屏作为语音显示系统。它完成了基于非特定人的语音识别系统的静态测试，其对于语音命令的平均识别率可达90%，并应用该系统构成了语音文本显示系统，该系统能对近距离规范的语音进行采样识别，在内部处理转换成文本信息在显示屏上显示。
关键词： 语音识别； ARM处理器； LD 3320; 12864; 信号。
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兰州工业学院毕业设计说明书（论文）
Abstract
Let the machine to understand human speech,it is a long dreamed of things. The speech recognition technology is to make the machine hrough the recognition and understanding of the process of speech signal transfer into the corresponding text or command of high technology,speech recognition is a cross-discipinary, involved in the areas of signal processing, pattern recognition theory, sound mechanism and auditory mechanism,artificial intelligence and so on.its application field is very wide,such as relative to the keyboard input mothod of speech input system, can be used for industrial control voice control system and service in the field of intelligent dialogue in the information inquiry system, highly today,speech recognition technology and its appliication in the information society has become an important part of.
Through the phonetic transfer information is the most important and the most effective, most commonly used and the most convenient exchange information form. At the same time, the language is human and machine the important tool of communication between, it is a kind of ideal man-machine communication way, thus for information processing system to retablish good interactive environment, further promote computer and other intelligent machine application,improve the social information degree.
With the embedded technology and communication technology development, the intelligent electronic technology has becom the mainstream of development trend,in the field of intelligent,from the processor selection,operating system selection and application development is the research hotspot. this design based on the ARM processor development processing audio signal trough a ARM9 processor S3C2410 chip as the embedded speech acquisition system, LD 3320 embedded speech recognition system elaborated the voice data acquisition and processing,the adoption of the beld which consists of 12864 display as a voice
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兰州工业学院毕业设计说明书（论文）
display system, It completed based on speaker-independent speech recognition system static test,the voice commands for the average recognition rate of up to 90%,and application of the system constitutes the speech text display system,this system could be used for close standard speech sampling recognition,in the internal processing into text information in the screen display.
Keywords: speech recognition； ARM processor； LD 3320; 12864;
Signal.
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兰州工业学院毕业设计说明书（论文）
目录
摘要 ............................................................ Ⅰ Abstract ........................................................ Ⅱ 前言 ............................................................. 1 1 系统整体方案 ................................................... 4 1.1 总体方案 ................................................... 4 1.2 语音识别原理 ............................................... 4 2 系统硬件设计 ................................................... 7 2.1 硬件模块主体关系 ........................................... 7 2.2 电源模块 ................................................... 8 2.3 寄存器模块 ................................................. 9 2.4 控制单元模块 .............................................. 10 2.4.1 ARMS3C2410芯片简介 .................................... 10 2.5 语音识别模块 ............................................ 11 2.5.1 LD 3320芯片简介 ....................................... 12 2.5.2 LD 3320功能单元 ...................................... 13 2.5.3 LD 3320芯片模式选择 ................................... 14 2.5.4 关键词的ID及其设置 .................................... 16 2.5.5 反应时间 ............................................... 16 2.6 GPRS模块 .................................................. 18 2.7 语音拨号模块 .............................................. 18 2.8 语音短信模块 .............................................. 19 2.9 LCD显示连接电路 ........................................... 19 2.9.1 12864芯片简介 ......................................... 21 3 系统软件设计 .................................................. 23 3.1 语音识别操作流程 .......................................... 23 3.2 系统程序流程 .............................................. 24
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兰州工业学院毕业设计说明书（论文）
4 软件调试 ...................................................... 26 4.1 上电调试 .................................................. 26 4.2 读写寄存器调试 ............................................ 26 4.3 检查存储器初始值 .......................................... 26 5 硬件调试 ...................................................... 28 5.1 硬件电路调试 .............................................. 28 5.2 硬件功能检查 .............................................. 28 5.3 综合调试 .................................................. 28 结论 ............................................................ 29 致谢 ............................................................ 30 参考文献 ........................................................ 31 附录 ............................................................ 32
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