1. Speech Recognition and Machine Translation Stephan Kanthak s.kanthak@aixplain.de AIXPLAIN AG, Aachen, Germany

2. AIXPLAIN AGStephan Kanthak,Speech Recognition / Machine Translation Technology Knowledge Management Machine Translation Speech Recognition Focus on Statistical Methods Focus on Statistical Methods Modular Software Architecture: Modular Software Architecture: Speech Recognition Speech Recognition Machine Translation Machine Translation Retrieval Retrieval Combined Applications: Combined Applications: Multilingual Retrieval Multilingual Retrieval Retrieval of Multimedia Data Retrieval of Multimedia Data Speech-To-Speech Translation Speech-To-Speech Translation...... Original Mission: Original Mission: Speech-To-Speech Translation (for Mobile Devices) Speech-To-Speech Translation (for Mobile Devices)

3. AIXPLAIN AGStephan Kanthak,Speech Recognition / Machine Translation Speech Recognition Search Acoustic Models Result Language Model Pronunciation Lexicon Preprocessing

4. AIXPLAIN AGStephan Kanthak,Speech Recognition / Machine Translation Speech Recognition: Current Research Feature Extraction Feature Extraction Phase Information Phase Information Noise Robustness Noise Robustness Acoustic Models Acoustic Models Adaptation Adaptation Maximum Entropy Models Maximum Entropy Models Discriminative Training Discriminative Training Multilingual Acoustic Models Multilingual Acoustic Models Language Models Language Models Class-Based Backing-Off Models Class-Based Backing-Off Models Open Vocabulary Open Vocabulary Search Search Weighted Finite-State Transducer Weighted Finite-State Transducer Dialogue Management Dialogue Management Reinforcement Learning Reinforcement Learning

5. AIXPLAIN AGStephan Kanthak,Speech Recognition / Machine Translation MT: Alignment Templates Search Lexical Models Postprocessing Language Model Alignment Templates Preprocessing

6. AIXPLAIN AGStephan Kanthak,Speech Recognition / Machine Translation Machine Translation: Current Research General General Incorporate Syntactic Knowledge Incorporate Syntactic Knowledge Improved Alignment Models Improved Alignment Models Context-Free Grammars Context-Free Grammars Phrase-Based Models Phrase-Based Models Language Models Language Models Class-Based Backing-Off Models Class-Based Backing-Off Models Maximum Entropy Models Maximum Entropy Models Search Search Stochastic Parser Stochastic Parser Weighted Finite-State Transducer Weighted Finite-State Transducer

7. AIXPLAIN AGStephan Kanthak,Speech Recognition / Machine Translation Research Projects At Lehrstuhl für Informatik VI At Lehrstuhl für Informatik VI Current Projects: Current Projects: PF-Star: Speech Translation PF-Star: Speech Translation TransType2: Computer Assisted Translation TransType2: Computer Assisted Translation LC-Star: Lexica and Speech Corpora for Speech-To-Speech Translation LC-Star: Lexica and Speech Corpora for Speech-To-Speech Translation Completed Projects: Completed Projects: TC-Star_P: Preparation of TC-Star TC-Star_P: Preparation of TC-Star CORETEX: Core Speech Recognition Technology CORETEX: Core Speech Recognition Technology VERBMOBIL II: Speech-To-Speech Translation VERBMOBIL II: Speech-To-Speech Translation Eutrans: Speech-To-Speech Translation Eutrans: Speech-To-Speech Translation ADVISOR: Transcription of German Broadcast News and Retrieval of Videoclips ADVISOR: Transcription of German Broadcast News and Retrieval of Videoclips GIZA++: Open-Source Statistical Machine Translation GIZA++: Open-Source Statistical Machine Translation

8. AIXPLAIN AGStephan Kanthak,Speech Recognition / Machine Translation Success Stories Research Systems: Research Systems: DARPA HUB4 Evaluation‘99: 4th best ASR system DARPA HUB4 Evaluation‘99: 4th best ASR system VERBMOBIL: fastest and 2nd best ASR system VERBMOBIL: fastest and 2nd best ASR system VERBMOBIL: best MT system VERBMOBIL: best MT system DARPA MT Evaluation‘02: best MT system DARPA MT Evaluation‘02: best MT system DARPA MT Evaluation‘03: 2nd best MT system DARPA MT Evaluation‘03: 2nd best MT system Production Systems: Production Systems: Almost 200 speech recognition licenses sold in 2003 Almost 200 speech recognition licenses sold in 2003 Largest installation of a pick-by-voice system in Europe in December 2003 Largest installation of a pick-by-voice system in Europe in December 2003