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Artificial intelligence SpeechRecognition System

presented by:D.PRAVALIKA

06N61A0472

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Contents:

Introduction

Technology

Terms and concepts

Block diagram of the system

Factors to be considered

Recent improvements

Current software options

Future of SR

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Introduction:

What is Speech recognition :

It is asoftware that allows the user to have

their spoken words to written text.It is

speaker independent.Voice Recognition

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Speech Recognition is speakerindependent.

Voice Recognition is speakerdependent.

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Types of speech recognition

Continuous speech

- dictation Discrete speech

- system controls

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What is AI?

What is artificialintelligence?

-Defined as, The study of

intelligent behavior and theto find ways in which suchbehavior could beengineered in any type of

artifact.

-Basically, putting humanintelligence into a machine

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Terms and concepts

Utterances

Pronounciations Accuracy

Grammers

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Speech recognition process

applications

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Microphone

NLP

display

i/pto

robots

Voice i/p

Commandstocomputers

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Microphone

BPF

BPF

BPF

BPF

ADC

ADC

ADC

ADC

Input

ckts

Diditised

speech

Templates

Output

cktsCPU

Amplifier

with AGC

RAM

Speaker independent process

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Factors to be considered

Time

Technology

Voice training

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Voice Training

Can be done by:

Predetermined text segments

Individual words

Compare new acoustic with old and combines

More training = better recognition

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Recent Improvements in SR

Faster training ~10 min.

Better recognition ~95% More compatible software

Better system control/command

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Current Software Options for PC

Dragon SystemsNaturally Speaking

PhilipsFreeSpeech

IBMViaVoice

Lernout & HauspieVoice Xpress

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How well do the work?

Training Dictation

Correct.

App.

Integrat.

Command

- Control

Dragon Excellent Excellent Good Good

Philips Fair Fair Good Good

IBM Excellent Good Good Excellent

L & H Good Good Good Good

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Future of SR

SUISpeech-based User Interface

Improvements needed:

- Greater accuracy

- Greater system control/command

- More compatible software

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Applications

Dictations

Commercial/Industrial Applications

Hand Held Digital Recorders

Air lines and hotel reservations

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Conclusion

It is important to consider the

environment.since it plays major

role.

The quality of speech recognisation

depends on environment

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References

1. Alwang, Greg. Speech Recognition, PC Magazine, December 1

1999

2. Hauptmann, Alexander G. Jang, Photina Jaeyun. Carnegie Mellon

University. Learning to Recognize Speech by Watching Television,IEEE Intelligent Systems, September/October 1999.

3. Miastkowski, Stan. Latest Speech Software Gets You Up and

Running Faster, PC World, November 1999.

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Thank you