Automatic Speech Recognition with Confidence Measures Obtained by Multiple Recognizers of Various Recognition Units

• Project/Area Number: 21700184
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Single-year Grants
• Research Field: Perception information processing/Intelligent robotics
• Research Institution: Doshisha University
• Principal Investigator: NISHIDA Masafumi 同志社大学, 理工学部, 准教授 (80361442)
• Project Period (FY): 2009 – 2011
• Project Status: Completed (Fiscal Year 2011)
• Budget Amount: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000); Fiscal Year 2011: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000); Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000); Fiscal Year 2009: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
• Keywords: 音声認識 / 認識単位 / 複合語 / 信頼度 / Support Vector Machine / 音声対話 / SVM / 目的地名

Research Abstract

In this study, I proposed a novel speech recognition method that improves the word recognition accuracy by using confidence measures obtained from multiple recognizers of various recognition units. The method uses Support Vector Machine(SVM) to select a single recognition result from multiple recognition results. The method can also identify whether the correct recognition result is included in the multiple recognition results. Experimental results show that the proposed method gives higher word accuracy and classification accuracy in comparison with a single recognizer and ROVER.

Research Products

• [Journal Article] Selection and Rejection of Recognition Results Obtained with Multiple Recognizers of Various Recognition Units Using Support Vector Machine (2012)
  • Author(s): N. Suzuki, T. Tanaka, M. Nishida, S. Yamamoto
  • Journal Title: Journal of Signal Processing Volume: Vol.16, No.4(掲載決定)
  • NAID: 130004457025
  • Peer Reviewed
• [Presentation] Automatic Speech Recognition with Confidence Measures Obtained by Multiple Recognizers of Various Recognition Units (2012)
  • Author(s): Nobuhisa Suzuki
  • Organizer: International Workshop on Nonlinear Circuits, Communications, and Signal Processing(NCSP)
  • Place of Presentation: Waikiki Beach Marriott Resort & Spa(Honolulu)
  • Year and Date: 2012-03-04
• [Presentation] Automatic Speech Recognition with Confidence Measures Obtained by Multiple Recognizers of Various Recognition Units' (2012)
  • Author(s): Nobuhisa Suzuki
  • Organizer: International Workshop on Nonlinear Circuits, Communications, and Signal Processing (NCSP)
  • Place of Presentation: Waikiki Beach Marriott Resort & Spa (Hawaii, USA)
  • Year and Date: 2012-03-04
• [Presentation] 異なる認識単位の認識器を併用したSVMによる認識結果の選択と判別 (2011)
  • Author(s): 西田昌史
  • Organizer: 日本音響学会2011年春季研究発表会
  • Place of Presentation: 早稲田大学(東京)
  • Year and Date: 2011-03-10
• [Presentation] 異なる認識単位の認識器から得られた信頼度を素性に用いた音声認識 (2010)
  • Author(s): 田中智之
  • Organizer: 第12回音声言語シンポジウム
  • Place of Presentation: 国立オリンピック記念青少年総合センター(東京)
  • Year and Date: 2010-12-21
• [Presentation] 認識単位の異なる認識器から得られた信頼度に基づく音声認識 (2010)
  • Author(s): 田中智之
  • Organizer: 日本音響学会2010年秋季研究発表会
  • Place of Presentation: 関西大学(大阪)
  • Year and Date: 2010-09-15
• [Presentation] Automatic Speech Recognition Based on Multiple Level Units in Spoken Dialogue System for In-vehicle Appliances (2010)
  • Author(s): Masafumi Nishida
  • Organizer: 13th International Conference on Text, Speech and Dialogue(TSD)
  • Place of Presentation: Hotel Continental in Brno(Czech Republic)
  • Year and Date: 2010-09-07
• [Presentation] Automatic Speech Recognition Based on Multiple Level Units in Spoken Dialogue System for In-vehicle Appliances (2010)
  • Author(s): Masafumi Nishida
  • Organizer: 13th International Conference on Text, Speech and Dialogue(TSD)
  • Place of Presentation: Hotel Continental in Brno (Czech Republic)
  • Year and Date: 2010-09-07
• [Presentation] 複合語を対象とした異なる認識単位による音声認識の検討 (2010)
  • Author(s): 田中智之
  • Organizer: 日本音響学会2010年春季研究発表会
  • Place of Presentation: 電気通信大学(東京)
  • Year and Date: 2010-03-08