SPEECH RECOGNITION

1
SPEECH RECOGNITION
2

• "I enjoy working with people."--HAL
  9000Open the pod bay doors, Hal."--Dave Bowman
  (Keir Dullea)"I'm sorry, Dave. I'm afraid I
  can't do that."--HAL"What's the
  problem?"--Dave"I think you know what the
  problem is just as much as I do."--HAL"What are
  you talking about, Hal?"--Dave"This mission is
  too important for me to allow you to jeopardize
  it."--HAL

3
A BRIEF INTRODUCTION
4
WHAT IS SPEECH RECOGNITION?

• SPEECH
• FEATURES USED IN RECOGNITION

5
SPEECH RECOGNITION SYSTEMS

• CLASSIFICATION

6
Classification continued..

• Isolated Word Recognition
• Continuous speech Recognition

7
Classification continued

• Speaker dependent
• Speaker independent
• Connected word
• Conversational

8
Basic phases of SR

• Training Phase
• Recognizing phase

9
Phases
10
How do they work?

• Audio Recording/Detection
• PreFiltering
• Framing/Windowing
• Additional filtering
• Matching

11
Applications/Uses

• Dictation
• Command
• Telephony
• Medical
• Embedded systems
• Car Industry
• Education

12
Contemporary Speech Recognition Software

• Dragon
• IBM
• Keystone Speech master
• Microsoft Office XP(inbuilt)

13
FUTURE IN SPEECH RECOGNITION

• Conversational recognition systems
• Reduction in voice drift
• Simplicity
• Improved hardware design

14
Future Applications

• Computer and Video Games
• Gambling
• Precision Surgery
• Domestic applications
• Wearable computers

15
Conclusion
16
REFERENCES

• Digital Speech Processing, Synthesis, and
  Recognition by Sadaoki Furui published in 1989 by
  Tokai University Press
• Trends in Speech recognition by Wayne A .Lea .
  1980 by Prentice Hall
• http//www.jiscmail.ac.uk/lists/FONETIKS.html
• http//www.kpn-telecom.nl/cave/
• http//cortex.itc.it/
• http//www.canberra.edu.au/pathways/papers
• http//www.edc.org