【正文】 攀枝花學(xué)院本科畢業(yè)設(shè)計(jì) (論文 ) 摘要 I 基于基音周期模型的語(yǔ)音識(shí)別 摘要 基音周期是表征語(yǔ)音信號(hào)本質(zhì)特征的參數(shù)，屬于語(yǔ)音分析的范疇，只有準(zhǔn)確分析并且提取出語(yǔ)音信號(hào)的特征參數(shù)，才能夠利用這些參數(shù)進(jìn)行語(yǔ)音識(shí)別處理。語(yǔ)音識(shí)別率的高低，都依賴于對(duì)語(yǔ)音信號(hào)分析的準(zhǔn)確性和精確性，因此基音周期的研究在語(yǔ)音信號(hào)的處理應(yīng)用中具有十分重要的作用。本論文通過(guò)兩種算法在Matlab 上實(shí)現(xiàn)基音周期的檢測(cè)，分別是短時(shí)自相關(guān)函數(shù)法和短時(shí)平均幅度差函數(shù)法。通過(guò)實(shí)驗(yàn)得到的基音周期結(jié)果的分析來(lái)識(shí)別不同的人的語(yǔ)音信號(hào)。 論文首先介紹了語(yǔ)音基音檢測(cè)算 法在語(yǔ)音識(shí)別方面的研究背景極其重要意義。其次對(duì)現(xiàn)有的基音檢測(cè)算法進(jìn)行了歸納和總結(jié)，并詳細(xì)的介紹本文將用的兩種基本基音檢測(cè)算法的基本原理及實(shí)現(xiàn)。最后在 Matlab 上對(duì)語(yǔ)音信號(hào)進(jìn)行基音周期的檢測(cè)。 本設(shè)計(jì)為語(yǔ)音信號(hào)的基音周期檢測(cè)，采集語(yǔ)音信號(hào)，對(duì)語(yǔ)音信號(hào)進(jìn)行處理，區(qū)分清音濁音，并通過(guò)對(duì)采樣值進(jìn)行濾波、分幀、求短時(shí)自相關(guān)函數(shù)，得到濁音的基音周期。 關(guān)鍵詞 ： 預(yù)處理 ,基音檢測(cè) ,自相關(guān)函數(shù)法 ,平均幅度差函數(shù)法 ,基音軌跡 ，語(yǔ)音識(shí)別攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)（論文） Abstract II Abstract pitch is characterization parameters of speech signal characteristics, belongs to the category of speech analysis, only the accurate analysis and extract the characteristic parameters of speech signal can use these parameters to speech recognition processing. voice recognition rate of high and low, are dependent on the accuracy of the analysis of speech signal and accuracy, so the pitch period of the study on speech signal processing plays an important role in this paper, through the two algorithm in Matlab pitch period detection, respectively is shorttime autocorrelation method and short time average magnitude difference function method. Pitch period is obtained by the experiment results of speech signal analysis to identify the different people. The curriculum design of pitch detection of speech signals, speech signal, the speech signal processing, distinguish between the voiced and unvoiced speech has different samples values in the filtering, framing, asks the shorttime autocorrelation function, have voiced sound pitch period. The thesis first introduces the research background of speech pitch detection algorithm is very important. Next to the existing algorithm for pitch detection are summarized, and a detailed introduction to this article will use the two kind s of basic pitch detection algorithm is the basic principle and realization. Finally in Matlab on speech signal pitch period detection. Keywords: pretreatment,pitch detection ,autocorrelation function。 the average magnitude difference function method。 pitch contrail， Speech recognition 攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)（論文） 目錄 目 錄 摘 要 .................................................................................................................................... I Abstract............................................................................................................................ II 1 緒論 ............................................................................................................................. 1 引言 ........................................................................................................................1 基音周期檢測(cè)對(duì)語(yǔ)音識(shí)別的意義 ..............................................................................2 基音周期檢測(cè)現(xiàn)狀 ...................................................................................................3 論文的結(jié)構(gòu)安排 .......................................................................................................4 2 基音檢測(cè)常用的算法 .................................................................................................. 5 引言 ........................................................................................................................5 常用的基音檢測(cè)算法及其原理 .................................................................................5 自相關(guān)函數(shù)法 ................................................................................................5 平均幅度差函數(shù)法 .........................................................................................8 本章小結(jié) .............................................................................................................. 10 3 基于 Matlab 基音周期的檢測(cè) ...................................................................................11 語(yǔ)音文件的錄制與讀入 ......................................................................................... 11 語(yǔ)音信號(hào)的采樣和分幀 ......................................................................................... 12 語(yǔ)音信號(hào)基音周期的檢測(cè) ...................................................................................... 16 短時(shí)自相關(guān)函數(shù)法檢測(cè)基音周期 .................................................................. 16 短時(shí)平均幅度差函數(shù)法檢測(cè)基音周期 ........................................................... 17 基音周期檢測(cè)的后處理 ......................................................................................... 19 濾波后的基音周期檢測(cè) ......................................................................................... 23 本章小結(jié) .............................................................................................................. 25 4 語(yǔ)音識(shí)別結(jié)果分析 .................................................................................................... 26 5 展望與應(yīng)用 ................................................................................................................. 30 附錄 ................................................................................................................................. 33 致 謝 ............................................................................................................................. 39 攀枝花學(xué)院本科畢業(yè)設(shè)計(jì)（論文） 1 緒論 1 1 緒論 引言 通過(guò)語(yǔ)言相互傳遞信息是人類最重要的基本功能之一。語(yǔ)言是人類特有的功能 ，它是創(chuàng)造和記載幾千年人類文明史的根本手段，沒(méi)有語(yǔ)言就沒(méi)有今天的人類文明。同時(shí)語(yǔ)言又屬于聲學(xué)范疇，是相互傳遞信息最重要的手段，是人類最重要，最有效，最常用和最方便的交換信息的形式。語(yǔ)音中除了包含實(shí)際發(fā)音內(nèi)容的語(yǔ)音信息外，還包括發(fā)音者是誰(shuí)及喜怒哀樂(lè)的各種信息。語(yǔ)音識(shí)別技術(shù)是一項(xiàng)集聲學(xué)，語(yǔ)音學(xué)，計(jì)算機(jī)，信息處理，人工智能計(jì)算機(jī)接口的范疇。現(xiàn)在的電腦網(wǎng)絡(luò)技術(shù)的普及和完善，對(duì)于語(yǔ)音信號(hào)處理技術(shù)發(fā)揮著越來(lái)越重要的作用。語(yǔ)音識(shí)技術(shù)是用來(lái)設(shè)計(jì)一種會(huì)聽話的計(jì)算機(jī)，只要對(duì)著麥克風(fēng)講話，便可以指揮計(jì)算機(jī)動(dòng)作，也就是要實(shí)現(xiàn)“芝麻 開門”聲控計(jì)算機(jī)的夢(mèng)想，當(dāng)然現(xiàn)在這已經(jīng)不是夢(mèng)想。語(yǔ)音信號(hào)處理的一系列技術(shù)及其應(yīng)用已經(jīng)成為信息社會(huì)中不可或缺的