關鍵詞萃取系統及語音聲控車之應用

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姓名

林品宏(Ping-Hung Lin) 查詢紙本館藏

畢業系所

電機工程學系

論文名稱

關鍵詞萃取系統及語音聲控車之應用
(A Keyword Spotting Technique and It’s Application to A Voice-activated car)

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摘要(中)

本論文的研究主題是針對前人的關鍵詞萃取中的特徵參數擷取作改良，將前人所用之LPC方法改為MFCC方法，並結合語音辨識系統建構一套聲控車系統。本論文主體可分為兩個部分，在關鍵詞萃取部分，關鍵詞與無關詞模組是用次音節模型來建立，目的是使的系統更有可攜性。第二部分是將建立出來的模型，利用Visual Basic 6的開發環境，應用一階動態辨識演算法，將我們的辨識技術製作成視窗化的人機介面，達到即時辨識的效果，並且可以根據辨識的結果，與市售的遙控車結合，讓車子可以依照使用者所講的方向移動。

摘要(英)

The topic of the thesis is modifying part of keyword spotting that feature extracting, we substitute method Mel-frequency cepstral coefficients for method Linear prediction coefficients, and construct a voice-activated car by speech recognition.
There are two topics in the thesis. In the first part, we focus on keyword spotting, and our keyword models and garbage models are building by sub-syllable models, and the advantage is that the system can save a lot of time. In the second part, we use Visual Basic 6 to make a human-machine interface for real-time recognition, and we combine the human-machine interface with remote control car to make a voice-activated car.

關鍵字(中)

★ 梅爾倒頻譜係數
★ 關鍵詞萃取
★ 語音聲控

關鍵字(英)

★ keyword spotting
★ Mel-frequency cepstral coefficients
★ voice-activated

論文目次

第一章緒論 1
1.1 研究動機 1
1.2 文獻回顧 1
1.3 論文大綱 6
第二章語音訊號處理 7
2.1 短時段語音處理[41] 7
2.1.1 取音框 7
2.1.3 能量計算 9
2.2 特徵參數擷取 9
2.2.1 梅爾倒頻譜 9
2.3 隱藏式馬可夫模型 13
2.4 聲學模型 15
2.5 模型訓練與參數重估 20
第三章關鍵詞萃取 25
3.1 關鍵詞萃取架構 25
3.1.1 關鍵詞模型 25
3.1.2 無關詞模型 26
3.2 辨識流程 26
3.2.1 辨識模組的排列 26
3.2.2 辨識演算法 27
第四章實驗與結果 31
4.1 實驗環境 31
4.2 關鍵詞萃取實驗 33
第五章系統應用 36
5.1 辨識流程 36
5.2 系統介紹 37
6.1 結論 41
6.2 未來展望 41
參考文獻 43

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指導教授

莊堯棠(Yau-Tarng Juang)

審核日期

2012-6-15

推文