【正文】 的成果。對(duì)本論文（設(shè)計(jì)）的研究做出重要貢獻(xiàn)的個(gè)人和集體，均已在文中以明確方式標(biāo)明。 本畢業(yè)論文（設(shè)計(jì)）成果歸蘭州商學(xué)院所有。 本文采用 綜合運(yùn)用 GUI 界面設(shè)計(jì)，各種函數(shù)調(diào)用等對(duì)語(yǔ)音信號(hào)進(jìn)行采集、提取、變頻、變幅，傅里葉變換、濾波等簡(jiǎn)單處理。 [關(guān)鍵詞 ] 語(yǔ)音信號(hào) Matlab 信號(hào)處理 GUI II ABSTRACT Voice signal processing is to study the use of digital signal processing technology and knowledge of the voice processing of the emerging discipline is the fastest growing areas of information science one of the core technology. In this article, using prehensive use GUI interface design, various function calls to simple processing of the voice signals such as collection, extraction, adjustment of frequency and amplitude, Fourier transform and filtering. The program interface is concise, simple and has some significance in practice. [Key Words] Voice Signal, Matlab, Signal Processing, GUI III 目 錄 一、 引言 ............................................................................................................................ 1 （一）課題的背景及意義 .......................................................................................... 1 （二）國(guó)內(nèi)外的研究現(xiàn)狀 .......................................................................................... 2 （三）本文主要內(nèi)容 .................................................................................................. 2 二、語(yǔ)音信號(hào)處理基本知識(shí)和仿真環(huán)境 ........................................................................ 3 （一）語(yǔ)音信號(hào)處理理論依據(jù) .................................................................................. 3 采樣定理 .................................................................................................... 3 采樣頻率 .................................................................................................... 3 采樣位數(shù)和采樣頻率 ................................................................................ 4 （二）語(yǔ)音信號(hào)的分析及處理 .................................................................................. 4 語(yǔ)音的錄入與打開(kāi) .................................................................................... 4 時(shí)域信號(hào)的 FFT 分析 ................................................................................ 5 倒譜的概念 ................................................................................................ 5 數(shù)字濾波器設(shè)計(jì)原理 ................................................................................ 6 （三）仿真環(huán)境 .......................................................................................................... 7 三、語(yǔ)音信號(hào)處理的總體方案 ........................................................................................ 9 （一）本文基本要求 .................................................................................................. 9 （二）語(yǔ)音信號(hào)的處理 ............................................................................................ 10 語(yǔ)音信號(hào)的采集 ...................................................................................... 10 語(yǔ)音信號(hào)的處理 ...................................................................................... 10 語(yǔ)音信號(hào)的效果顯示 .............................................................................. 10 語(yǔ)音信號(hào)處理方框圖 .............................................................................. 10 四、語(yǔ)音信號(hào)處理實(shí)例 .................................................................................................. 12 （一）信號(hào)的采集 .................................................................................................... 12 （二）語(yǔ)音信號(hào)的提取 ............................................................................................ 12 （二）語(yǔ)音信號(hào)的調(diào)整 ............................................................................................ 13 語(yǔ)音信號(hào)的頻率調(diào)整 .............................................................................. 13 語(yǔ)音信號(hào)的振幅調(diào)整 .............................................................................. 15 （三）語(yǔ)音信號(hào)的傅里葉變換 ................................................................................ 16 （四）語(yǔ)音信號(hào)的濾波 ............................................................................................ 18 語(yǔ)音信號(hào)的低通濾波 .............................................................................. 19 語(yǔ)音信號(hào)的高通濾波 .............................................................................. 20 語(yǔ)音信號(hào)的帶通濾波 ...........................................................................