语音信号采集程序设计+文献综述
时间:2017-05-22 20:00 来源:毕业论文 作者:毕业论文 点击:次
| 摘 要语音，即语言的声音，是语言符号系统的载体。它由人的发音器官发出，负载着一定的语言意义。语言依靠语音实现它的社会功能。语言是音义结合的符号系统，语言的声音和语言的意义是密切联系着的。因此，语言虽然是一种声音，但又与一般的声音有着本质的区别。语音是人们交流思想和进行社会活动的最基本手段。因此，我们要对语音信号进行采集和处理分析，优化人类通信交流。语音信号采集是语音通信、语音增强、语音合成、语音识别及语者识别等技术的基础。语音信号的好坏、语音识别率的高低等都取决于语音信号采集的好坏。因此，设计语音信号采集程序及语音波形分析是一项非常有意义的研究课题。关键词 ： 语音信号采集、语音信号处理、语音波形分析8993 毕业设计说明书（论文）外文摘要 Title: The Program Design of Voice signal acquisition Abstract Voice, the sound of the language, is the carrier of linguistic sign systems. It is issued by the human vocal organs, load a certain amount of linguistic meaning. Language dependent voice to achieve its social function. Language is the combination of sound and meaning of the symbol system, language, the meaning of the voice and language are closely linked, and therefore, although the language is a voice, but the sound in general is essentially different. Voice that people exchange ideas and conduct the most basic means of social activities, so we have to gather and deal with the voice signal analysis to optimize human communication exchange. Voice signal acquisition is the foundation of voice communications, speech enhancement, speech synthesis, speech recognition and speaker recognition and so on. The quality of the voice signal, the level of speech recognition rate and all depend on whether the voice signal acquisition is good or bad. Therefore, the design of voice signal acquisition procedure and the voice waveform analysis is a very meaningful research topic. Keywords: Voice signal acquisition; Voice signal processing; Voice waveform analysis 目次 1 绪论 4 1.1 语音信号采集的背景及基础 4 1.2 语音信号采集和处理在信息科学中的地位和作用 5 1.3 语音信号的特点 6 2 WAV音频文件 8 2.1 WAV音频文件简介 8 2.2 WAV音频文件剖析 8 2.3 WAV音频文件特点 9 3 语音信号的采集及分析技术 10 3.1 语音信号的采集 10 3.1.1 防混叠预滤波 10 3.1.2 原始模拟语音信号的采样和量化 10 3.1.3 语音信号的A/D变换及保存 10 3.2 语音信号分析技术 10 3.2.1 语音信号的时域分析 10 3.2.2 短时能量 11 3.2.3 短时平均过零率 12 3.2.4 短时自相关函数 13 4 音频处理程序设计与实现 14 4.1 总体设计与分析 14 4.1.1软件设计目的 14 4.1.2软件功能分析 14 4.1.3软件总体设计 15 4.1.4软件流程设计 16 4.2 各模块详细设计与实现 17 4.2.1语音信号采集模块的实现 17 4.2.2语音信号处理模块的实现 21 4.2.3语音波形处理模块的实现 24 结论 27 致谢 28 参考文献 29 (责任编辑：qin) |