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系統識別號 U0026-1808201615131300
論文名稱(中文) 基於長短期記憶模型於語音情緒剖面追蹤和病狀驗證進行情感性疾患之偵測
論文名稱(英文) Mood Disorder Detection from Speech Using LSTM-Based Emotion Profile Tracking and Mood Verification
校院名稱 成功大學
系所名稱(中) 資訊工程學系
系所名稱(英) Institute of Computer Science and Information Engineering
學年度 104
學期 2
出版年 105
研究生(中文) 周佳惠
研究生(英文) Chia-Hui Chou
學號 P76034517
學位類別 碩士
語文別 英文
論文頁數 65頁
口試委員 指導教授-吳宗憲
口試委員-王駿發
口試委員-戴顯權
口試委員-王家慶
口試委員-楊家輝
中文關鍵字 情感性疾患  語音情緒辨識  語料調適  自動編碼器  長短期記憶神經網路  病狀驗證 
英文關鍵字 Mood disorder  speech emotion recognition  domain adaptation  autoencoders  long short-term memory  mood verification 
學科別分類
中文摘要 情感性疾患中,憂鬱症及躁鬱症已經為現今常見的心理疾病。臨床診斷發現,躁鬱症患者處於鬱期就診時,有相當大比例的患者被誤診為憂鬱症。由於語音是人最自然表達情感的方式,本論文透過追蹤語音情緒剖面建立一套情感性疾患的偵測系統提供參考指標,並協助醫生更精確的診斷。
本論文之研究主要藉由應用觀看激發影片後產生之回應語音,做情感性疾患之短期偵測。首先,病患藉由觀看六種情緒影片,並以觀後訪談的方式來收集病患被激發的語音訊號。本論文方法中,由於低階語音特徵(LLDs)及深層散射頻譜(DSS)在參數頻域上更能取得較細微的能量分布資訊,因此結合DSS與LLDs,透過階層式頻譜分類方法將情緒語料庫調適至病狀語料庫降低病狀語料在情緒空間上的差異,並使用自動編碼器萃取瓶頸特徵參數,藉由長短期記憶(Long Short Term Memory)的情緒偵測模型預測情緒剖面,並將患者語音情緒上連續的表現軌跡應用隱藏式馬可夫模型來描述,最後運用驗證式的隱藏式馬可夫模型作驗證,以強化模型於症狀的識別效果。
本論文實驗共收集各15位憂鬱症、躁鬱症與健康組三種類別案例的回應語音,採用5次交叉驗證做實驗評估依據。實驗結果顯示,本論文提出短時間情緒表現追蹤及病狀驗證可達到73.33%,相較於傳統的支持向量機提升18%。未來希望可以將考慮病患的人格特質並結合回應之文字與表情影像以得到較佳之效能。
英文摘要 In mental health disorder, Unipolar Depression (UD) and Bipolar Disorder (BD) have become the most common mental illness. A large portion of the BD patients is misdiagnosed as UD on initial presentation. As speech is the most natural way to express emotion, this thesis focus on tracking emotion profile of speech to build a short-term mood disorder detector for diagnosis assistance.
This thesis proposes an approach to short-term detection of mood disorder based on the elicited speech responses. At first, eliciting emotional videos are used to elicit the patients’ emotions. Speech responses of the patients are collected through the interviews by a clinician after watching each of six emotional video clips. As Deep Scattering Spectrum (DSS) can obtain more detailed energy distributions in frequency domain than the Low Level Descriptors (LLDs), this study combines LLDs and DSS as the speech features. A domain adaptation method combining hierarchical spectral clustering (HSC) algorithm and denoising autoencoder is proposed to adapt the emotion database to the mood disorder database to alleviate the data bias problem in the emotion space. The autoencoders is then adopted to extract the bottleneck features for dimensionality reduction. Hidden Markov model (HMM) is applied to characterize the trajectory of emotion profiles. Finally, HMM-based verification is used to improve the detection performance of mood disorders.
This study collected the elicited emotional speech data from 15 BDs, 15 UDs and 15 healthy controls. Five-fold cross validation scheme was employed for evaluation. Experimental results show that the proposed method achieved a detection accuracy of 73.33%, improving by 18%, compared to the SVM-based method. In the future, the patient’s personality, response context and facial images can be considered for obtaining a better performance.
論文目次 摘要 I
Abstract II
誌謝 IV
Contents V
List of Tables VII
List of Figures VIII
Chapter 1 Introduction 1
1.1 Background 1
1.2 Motivation and Goal 4
1.3 Literature Review 4
1.3.1 Research Mood Disorder Detection 4
1.3.2 Recognition Units 6
1.3.3 Features 6
1.3.4 Models 8
1.4 Problems and Proposed Ideas 11
1.5 Research Framework 13
Chapter 2 Database Design and Collection 14
2.1 Chi-Mei Mood Database 14
2.1.1 Introduction 14
2.1.2 Criterion for Eliciting Emotion Video Selection 15
2.1.3 Collection Environment 17
2.1.4 Assessment Criterion 18
2.1.5 Collection Flow 19
2.2 MHMC Emotion Database 22
Chapter 3 Proposed Methods 23
3.1 Speech Preprocessing 24
3.2 Feature extraction 26
3.3 Autoencoder for Database Adaptation and Bottleneck Feature Extraction 28
3.3.1 Hierarchical Spectral Clustering Algorithm 28
3.3.2 Autoencoder 31
3.4 Emotion Model Construction and Emotion Profile Prediction 35
3.4.1 Emotion Profile 35
3.4.2 Long Short-Term Memory 36
3.5 Mood Model Construction and Verification 41
3.5.1 HMM-Based Verification Construction 41
3.5.2 Mood Detection by Verification Model 44
Chapter 4 Experimental Results and Discussion 46
4.1 MHMC Emotion Performance Analysis 46
4.2 Chi-Mei Mood Classification Performance 48
4.3 Evaluation of System Performance 53
4.3.1 Evaluation on LSTM+HMM 53
4.3.2 Evaluation on HSC adaptation 53
4.3.3 Evaluation on Bottleneck feature 54
4.3.4 Effect of Window size and Segment size 56
4.4 Discussion 57
Chapter 5 Conclusion and Future Work 58
Reference 59
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