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| DC 欄位 | 值 | 語言 |
|---|---|---|
| dc.contributor.advisor | 李琳山 | |
| dc.contributor.author | Hung-Yi Li | en |
| dc.contributor.author | 李宏毅 | zh_TW |
| dc.date.accessioned | 2021-06-15T04:50:47Z | - |
| dc.date.available | 2010-08-17 | |
| dc.date.copyright | 2010-08-17 | |
| dc.date.issued | 2010 | |
| dc.date.submitted | 2010-08-02 | |
| dc.identifier.citation | [1] http://www2.sims.berkeley.edu/research/projects/how-much-info/internet.html.
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| dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/45995 | - |
| dc.description.abstract | 本論文提出了以使用者相關回饋提升檢索效能的新架構。過去在語音檢索的領域，有關使用者相關回饋的研究僅限於套用文件檢索領域的技術來修正檢索模型，而本論文提出了以使用者相關回饋來重估測辨識系統的聲學模型參數之新技術。有別於傳統的聲學模型訓練或調適法，本論文以提升檢索效能做為聲學模型訓練的目標，將檢索系統以排序結果進行評估的特性在聲學模型訓練的過程中加以考慮，以及使用沒有標註的資料防止過度適應的情況發生，初步的實驗結果顯示提出的方法可以有效的提升口述語彙偵測系統的效能。
本論文嘗試將長期情境相關回饋、基於範例的虛擬回饋以及基於範例和模型的短期情境相關回饋進行結合，在系統僅從使用者相關回饋得知 5 個口語片段相關性的情況下，凍結排序平均準確率從 0.4819 進步到 0.5433 ，相對進步率為 12.74% ；在系統擁有 60 個訓練查詢詞的相關回饋歷史紀錄之情況下，凍結排序平均準確率從 0.4819 進步到 0.5514 ，相對進步率為 14.42% 。 | zh_TW |
| dc.description.provenance | Made available in DSpace on 2021-06-15T04:50:47Z (GMT). No. of bitstreams: 1 ntu-99-R97942033-1.pdf: 2997757 bytes, checksum: 342b413e55e3fe29ac3bbcfad12306ca (MD5) Previous issue date: 2010 | en |
| dc.description.tableofcontents | 一、緒論. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 研究背景. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 1.2 本論文研究方向. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 1.3 本論文研究貢獻. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 1.4 本論文內容架構. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 二、背景知識介紹. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.1 資訊檢索背景知識介紹. . . . . . . . . . . . . . . . . . . . . . . . . . 6 2.2 語音檢索背景知識介紹. . . . . . . . . . . . . . . . . . . . . . . . . . 7 2.3 使用者相關回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 2.3.1 文件資訊檢索上的相關回饋. . . . . . . . . . . . . . . . . . . 14 2.3.2 圖像資訊檢索上的相關回饋. . . . . . . . . . . . . . . . . . . 15 2.3.3 語音資訊檢索上的相關回饋. . . . . . . . . . . . . . . . . . . 16 2.4 資訊檢索評估機制. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 三、本論文提出的相關回饋技術. . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.1 架構. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.1.1 短期情境. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 3.1.2 長期情境. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25 3.2 提出方法與傳統方法之比較與優勢. . . . . . . . . . . . . . . . . . . 25 3.2.1 和PodCastle系統比較. . . . . . . . . . . . . . . . . . . . . . 25 3.2.2 和辨識結果增強法比較. . . . . . . . . . . . . . . . . . . . . . 27 3.2.3 和傳統聲學模型訓練法比較. . . . . . . . . . . . . . . . . . . 30 四、語音資料庫與實驗環境設定. . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.1 測試語料. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.2 聲學模型訓練語料. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.3 工具. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4.4 前端處理. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.5 聲學模型訓練. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33 4.6 辭典與語言模型. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34 五、以相關回饋重估測聲學模型. . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.1 相關分數. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 5.2 目標函數. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37 5.3 考慮檢索的特性. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 5.3.1 加入排序. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39 5.3.2 考慮測試資料. . . . . . . . . . . . . . . . . . . . . . . . . . . 41 5.4 實驗結果. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.4.1 基礎實驗. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.4.2 不同的目標函式. . . . . . . . . . . . . . . . . . . . . . . . . . 43 5.4.3 考慮測試資料. . . . . . . . . . . . . . . . . . . . . . . . . . . 46 5.4.4 決定聲學模型訓練的迭代數目. . . . . . . . . . . . . . . . . . 54 5.5 小結. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63 六、結合基於範例的相關回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . 64 6.1 基於範例的相關回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . 64 6.2 結合基於模型和基於範例的相關回饋. . . . . . . . . . . . . . . . . . 66 6.3 實驗結果. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 66 6.4 小結. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68 七、結合虛擬回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 7.1 虛擬回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 7.2 虛擬回饋與相關回饋的結合. . . . . . . . . . . . . . . . . . . . . . . 78 7.3 實驗結果. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79 7.4 小結. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80 八、結合長期情境相關回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 8.1 長期情境相關回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83 8.2 實驗結果. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84 8.2.1 長期情境相關回饋. . . . . . . . . . . . . . . . . . . . . . . . 84 8.2.2 結合長期情境相關回饋、虛擬回饋與短期情境相關回饋. . . 86 8.3 小結. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87 九、結論與未來展望. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 9.1 結論. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 9.2 未來研究方向. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 88 9.2.1 和音素混淆度結合. . . . . . . . . . . . . . . . . . . . . . . . 88 9.2.2 隱藏回饋. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 9.2.3 語意分析. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 89 參考文獻. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92 | |
| dc.language.iso | zh-TW | |
| dc.subject | 相關回饋 | zh_TW |
| dc.subject | Relevance Feedback | en |
| dc.title | 以使用者相關回饋改進語音資訊檢索之新架構 | zh_TW |
| dc.title | A New Framework of Improving Speech Information Retrieval by User Relevance Feedback | en |
| dc.type | Thesis | |
| dc.date.schoolyear | 98-2 | |
| dc.description.degree | 碩士 | |
| dc.contributor.oralexamcommittee | 陳信宏,王小川,鄭秋豫 | |
| dc.subject.keyword | 相關回饋, | zh_TW |
| dc.subject.keyword | Relevance Feedback, | en |
| dc.relation.page | 104 | |
| dc.rights.note | 有償授權 | |
| dc.date.accepted | 2010-08-02 | |
| dc.contributor.author-college | 電機資訊學院 | zh_TW |
| dc.contributor.author-dept | 電信工程學研究所 | zh_TW |
| 顯示於系所單位： | 電信工程學研究所 | |
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| ntu-99-1.pdf 未授權公開取用 | 2.93 MB | Adobe PDF |
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