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Audio and Speech Processing Microproject

Speech Recognition using MATLAB

Submitted by:Shubham Mittal

Roll no.101306160Shubham Jindal

Roll no.101306159

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Thursday, April 27, 2023THAPAR UNIVERSITY, PATIALA 2

What is Speech Recognition?

Speech recognition can be defined as the independent, computer‐driven transcription of spoken language into readable text in real time. In a nutshell, SR is technology that allows a computer to identify the words that a person speaks into a microphone or telephone. Having a machine to understand fluently spoken speech has driven speech research for more than 50 years.   Although SR technology is not yet at the point where machines understand all speech, in any acoustic environment, or by any person,  it is used on a day‐to‐day basis in a number of applications and services.

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Thursday, April 27, 2023THAPAR UNIVERSITY, PATIALA 3

What are the applications of Speech Recognition?

In-car system: like gps navigation and voice controlled mobile etc.Military use: helicopters, stealth fighter planes etc.EducationAutomatic translationRoboticsInteractive voice response: like Siri or CortanaHands-free computingHealth: for physically disabled personsTranscription

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Thursday, April 27, 2023THAPAR UNIVERSITY, PATIALA 4

Approach?

There are numerous ways in which we can make a speech recognition system. But in this approach we utilise the amplitude of speech signals.First we have a sample sound of a word(Hello) which we read in MATLAB using waveread. Then we record a new voice in realtime and then compare the amplitudes of both in order to decide which word is spoken by the speaker.In order to accomplish this we have taken a threshold value by hit and trial of numerous samples and we take the difference of the maximum amplitude and minimum amplitude above this threshold.

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Thursday, April 27, 2023THAPAR UNIVERSITY, PATIALA 5

Thankyou