Speech Recognition

by-Arpit Kumar (2191)Nitin Kanaujia (2269)Raghav Vij (2291)

Mentor-Mr. B Suresh

Introduction•What is speech?

•What is speech recognition?

Why do we need speech recognition

•Most Natural Form Of Communication• Differently abled people• Illiterate• Helplines• Cars

TYPES

• An Automated Speech Recognition can be-• Speaker dependent• Speaker independent• Continuous Speech• Limited Vocabulary• Unlimited Vocabulary

How speech recognition works

• Speech segment extraction-Three classes of sound –• Voiced sound , unvoiced sound and silent• Get differentiated on entropy , energy and zero

crossing theorems• Speech signal capture• Endpointing• Feature extraction from speech signal• Template matching algorithm• Acoustic models• Language models • Pronunciation models

Recognition Flowchart presentation

Voice Input Analog to Digital Acoustic Model

Language Model

Display Speech EngineFeedback

Real life example

Speech Recognition Problems

Application

Driver - Car Interaction