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S PEECH T ECHNOLOGY

S PEECH T ECHNOLOGY. An Overview. Gopala Krishna. A (gopalakrishna@students). S PEECH T ECHNOLOGY. WHAT IS SPEECH TECHNOLOGY ABOUT ?? SPEECH TECHNOLOGY IS ABOUT PROCESSING HUMAN SPEECH as SIGNAL as a form of LANGUAGE. S PEECH T ECHNOLOGY. Speech Processing By Machine.

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S PEECH T ECHNOLOGY

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  1. SPEECH TECHNOLOGY An Overview Gopala Krishna. A (gopalakrishna@students)

  2. SPEECH TECHNOLOGY WHAT IS SPEECH TECHNOLOGY ABOUT ?? SPEECH TECHNOLOGY IS ABOUT PROCESSING HUMAN SPEECH • as SIGNAL • as a form of LANGUAGE

  3. SPEECH TECHNOLOGY • Speech Processing By Machine Algorithms: Speech Recognition, synthesis, coding etc.

  4. SPEECH TECHNOLOGY WHAT ALL IS INVOLVED IN PROCESSING SPEECH ?? MULTI-DISCIPLINARY FIELD • Linguistics • Physiology • Psychology • Signal Processing • Acoustics (Physics) • Statistics • Pattern Recognition • Communication Theory • Computer Science: A.I. • Heuristics / Machine Learning Speech Technology

  5. Applications: Man-Machine • Smart Talking Machines, devices • Speech enabled web interface Communication • Speech Coding • Speech Enhancement Bio Metrics • Speaker Identification – security applications Entertainment Technology • Singing Voices • Voice Conversion • Artificial Characters / Avatar

  6. Research Areas: • Speech Recognition (Speech To Text) • Speech Synthesis (Text to Speech) • Speech Coding (Compression of speech) • Speech Enhancement (Voice quality) • Speaker Recognition (Identity of the speaker) • Spoken Language Identification (Which language?) • Language Models (Modeling of natural text) • Multimedia (Integration of Audio & Visual modes)

  7. SPEECH TECHNOLOGY WHAT ARE WE DOING CURRENTLY ?? • INDIAN LANGUAGE SPEECH SYNTHESIS • Hindi and Telugu TTS building • Prosody • SPEECH RECOGNITION • - Large Vocabulary ASR • - Landmark-based ASR • 3. SPEECH-ENABLED INTERFACES

  8. Text-To-Speech Synthesis (TTS) • Indian Language TTS Effort • Hindi, Telugu, Tamil, Kannada, Bengali • Text Normalization • Machine learning Techniques • Speech Segmentation • Ergodic HMMs, SVMs….etc

  9. Automatic Speech Recognition • Large Vocabulary ASR • “Mimic”ing the Sphinx • Alternative ASR Techniques • HMM-ANN Hybrid • Dynamic Bayesian Networks (DBNs) • Landmark-based Segmentation

  10. Speech Enabled Interfaces • Screen Readers • RAVI (Reading Aid for the Visually Impaired) • Porting to Low Memory devices • Talking Tourist Aid Agent (PDA) • Speech-to-Speech Devices • Limited Domain Bi-lingual translation

  11. Projects • Hindi TTS (Sponsored by NOKIA) • Telugu TTS (Sponsored by Bhrigus Inc.) • Speech Recognition Systems for Indian Lang. (Sponsored by HP labs India) • Reading Software For Blind (Sponsored by Ministry of Social Justice).

  12. Stream Courses • Speech Technology: A Practical Introduction • Topics in Speech Processing • Building TTS and ASR Systems • Signal Processing • Language Modeling • - Intro. To NLP • - Language and Statistics • Machine Learning, Pattern Recognition

  13. SPEECH TECHNOLOGY WHO WILL YOU BE WORKING WITH ?? • S. P. Kishore (Ph.D. @ CMU, Scientist @ IIIT) • Prof. Rajeev Sangal • Dr. Vasudeva Varma • Faculty Members of Speech Group at CMU • Dr. Alan Black, Dr. Jim Baker….. (TTS) (ASR) • Fellow researchers

  14. What you get at the end Career Opportunities – Off late, many companies and R & D organizations are investing in Indian Language and specifically in speech systems - Microsoft Research (Bangalore), HP Labs India, Yahoo India Research skills – publications Interaction and collaboration with faculty members of Speech Group at Carnegie Mellon System building skills - Would have developed speech systems using state of art techniques Opportunities for higher education in India and abroad

  15. SPEECH TECHNOLOGY QUESTIONS [ skishore@cs.cmu.edu ]

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