voice recognition system ppt
DESCRIPTION
This is a Presentation which you can submit as a Seminar in final year of engineering.TRANSCRIPT
![Page 1: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/1.jpg)
VOICE RECOGNITION SYSTEM
(VRS)
By:- Arun SharmaB.Tech, ECE 7th Sem
![Page 2: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/2.jpg)
INTRODUCTION
Voice Recognition System’s are those systems which can recognize the voices
of the individuals.
![Page 3: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/3.jpg)
3/34
How Humans do This????????
Articulation producessound waves whichthe ear conveys to the brainfor processing.
![Page 4: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/4.jpg)
4/34
How might computers do this????
DigitizationAcoustic analysis of the
speech signalLinguistic interpretation
Acoustic waveform Acoustic signal
Speech recognition
![Page 5: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/5.jpg)
Isolated Systems requires a brief pause between the spoken words.While Continuous Systems doesn’t.
Speaker Dependent Systems recognize speech from only one speaker.While Speaker-Independent Systems can recognize anyone’s speech.
![Page 6: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/6.jpg)
How to create a Voice Recognition System
Speech Acquisition(Collection). Speech Analysis. User Interface Development.
![Page 7: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/7.jpg)
Speech Acquisition• For training purpose the
speech is acquired using the microphone, for the analysis.
• The sound card of PC converts the Analog Speech input into digital format for further analysis.
![Page 8: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/8.jpg)
Speech Analysis
The First important step in Speech Analysis is to separate each word from the ambient noise. Further each spoken word is compared with the inbuilt acoustic model or dictionary which is created during the training session. The above step is done with the help of an efficient speech detection algorithm.
![Page 9: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/9.jpg)
User Interface Development
Final Step is to Develop a User Interface, so that all users can use these system with ease. For Example: Speech Recognition System of Windows 7 looks so compact & is as shown below.
![Page 10: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/10.jpg)
APPLICATIONS
Telephony and Other Domains. People with Disabilities. Training Air-Traffic Controller. High Performance Fighter Air-Craft. Electronic Medical Records etc…
![Page 11: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/11.jpg)
People with Disability• This picture shows
how Voice Recognition System is helping a Disable man to complete his work.
![Page 12: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/12.jpg)
Voice Recognition Gadgets
• Voice Recognition Systems can be embedded with modern gadgets. Example:-TV etc
![Page 13: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/13.jpg)
Voice Recognition in High-Performance Fighter Aircrafts
Voice Recognition System has substantially added in High-Performance Fighter Aircrafts.
This System helps the pilot to control the various subsystem in an effective manner.
F-35 is the first US Fighter Aircraft with Voice Recognition System able to hear the pilot spoken commands to manage various aircraft subsystems, such as communications and navigation.
![Page 14: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/14.jpg)
Voice Recognition System: Flaws and Weakness
Low signal-to-noise ratio. Overlapping speech. Differentiation b/w Homonyms. Intensive use of computer power.
![Page 15: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/15.jpg)
HUMAN PERFROMANCE(According to a paper written by Lippmann in 1997)
Digits Error Rate Word Error Rate
![Page 16: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/16.jpg)
How to Remove Flaws and Weakness of VRS
Using High Quality Microphone. Use Good Quality of Sound Cards. System must be trained properly. If possible work in quiet environment.
![Page 17: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/17.jpg)
CONCLUSION Human performance figures suggests that we still
have enormous room for improvement. At present several new algorithms are developed to
implement voice recognition system.
![Page 18: Voice Recognition System PPT](https://reader034.vdocuments.mx/reader034/viewer/2022052315/5526e753550346d2358b45a3/html5/thumbnails/18.jpg)
THANK YOU