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Design And Implementation Of A Speech Recognition System And Its Application

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Table of Contents

1.            Introduction and Overview  

1.1   Physiology of Speech Generation 

1.2   The Human Ear                                                                                                                        

1.3   Speech Recognition Techniques                                                                                      

1.3.1          System Overview 

1.3.2          Hardware

1.4   Software                                                                                                    

1.5   Conclusion                                                                                                                

2.            Speech Recognition System Implementation                                               

2.1     Speech Recognition                                                                                                             

2.1.1          Speech Signal Input – Microphone                                                         

2.1.2          Digitization                                                                                                       

2.1.3          Speech Spectrogram                                                                                     

2.1.4          Windowing                                                                                                       

2.1.5          Fourier Transform                                                                                          

2.1.6          Mel Scale                                                                                                           

2.1.7          Mel Frequency Filter Bank                                                                         

2.2     Software Design                                                                                                                    

2.2.1          Speech Signal Processing using MATLAB                                              

2.2.2          Fingerprint Matching                                                                                    

2.3     Conclusion                                                                                                                               

3.            Application of Speech Recognition in Motion Actuation                                

3.1     Circuit Diagram and Description                                                                                     

3.2     Serial Data Communication                                                                                              

3.2.1           Level Converter Chips 

3.2.2          MAX232 Voltage Level Converter

3.3     Atmega32 Microcontroller                                                                                

3.4     Motor Driver                                                                                                                           

3.4.1          L293D Dual Motor Driver                                                                             

3.5     LM7805 Voltage Regulator                                                                                

3.6     Microcontroller Programming                                                                                         

3.7     Conclusion                                                                                                                               

4.            Hardware and Software Integration                                                   

4.1    ParallelPortProgramming of Microcontroller                                                         

4.2     Hardware – Software Implementation                                                                        

4.3     Testing Phases                                                                                                                       

5.            Conclusion and Scope for Future Work                                                            

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