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TRIBHUVAN UNIVERSITY Institute of Engineering of Engineering
Final Year Project Proposal on
"BRAILLE TUTOR"
Submitted to Department of Electronics of Electronics and Computer Engineering Pulchowk Campus , I.O.E July 9, 2009
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[062BEX437]
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Mr. Surendra Shrestha
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(Project Coordinator) Department of Electronics and Computer Engineering, IOE, Pulchowk Campus, Lalitpur
Subject: Proposal Submission
Sir,
This is a proposal for final year project under the course EG777EX offere by Department of Electronics and Computer Engineering, Pulchowk Campus, IOE. proposal
is
submitted You're to Reading the department a Preview
referring
to the notic
published in the department notice Unlockboard. full access with a free trial.
With Free to Trial Our proposal entitled “BRAILLEDownload TUTOR” proposes build a computer based system that is able to teach Braille script to blind people. Hereby the proposal is submitted for your kind perusal and approval.
Yours Sincerely,
Master your semester with Scribd SAMPURNA BHATTACHAN [062BEX437] & The New York Times Special offer for students: Only $4.99/month. SUSHIL ADHIKARI
[062BEX446]
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ACKNOWLEDGEMENT
We would like to express our sincere thanks to the Department of Electronics Computer Department for providing us the opportunity to explore our interest ideas in the field of engineering through this project.
The course "Innovation for future team leaders of BE project" organized by Dr. Jyo Tandukar gave us chance to present and refine our project ideas. We would like to than him for organizing this course and acknowledge his contribution in making us capable pursuing this noble project.We are also very thankful to Mr Uttam Mali and Pradhumna Lal Shrestha.
We are equally indebted to our project coordinator Dr. Surendra Shrestha for providin suggestions and guidelines for the project preparation. Finally, We would like offer our gratitude to everyone who have directly or indirectly inspired us for project .
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TABLE OF CONTENTS
Acknowledgement Abstract 1. Introduction …………………………………………………………………1 2. Literature review……………………………………………………………2 3. Methodology …….…………………………………………………………3 3.1 Hardware Environment ………………………………………………3 3.2 Software Environment………………………………………………..4 4.Work Division
…………………………………………………………..8
You're Reading a Preview 5. Application and Scope ………………………….…………….…………9 Unlock full access with a free trial.
6. Project schedule …………………………………………………………..10 Download With Free Trial 7. Bibiliography ………………………………………………….…………..11
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ABSTRACT
Braille Tutor provides a beginner level platform for the blind people wanting to lear Braille characters for the first time. Braille Tutor will have mainly two parts: Voice
Braille conversion and Braille to Voice conversion. It will have microphone for voic
input, 3X2 matrix buttons for Braille, PC for processing data and speaker for voic output. For Voice to Braille, we intend to use character recognition technique for identifying alphabet and Braille pattern shall be generated on the buttons. For the detection of spoken character, we will perform the analysis in frequency domain where amplitude the voice frequencies shall be compared with the amplitudes that are already in database and whichever has the best matched condition is our character. For
character recognition technique, we will use Conventional Hidden Markov Mod (HMM) in MATLAB. Our final project will be presented in C# or Java.
For Braille to Voice, we will check whether the pressed buttons match with the Brail
characters. For this, we will compare the pressed pattern with the ones in the databas and if matches, then sound will be heard notifying the matched characters.
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1. INTRODUCTION:
The purpose of our project is to develop a BRAILLE TUTOR for the blind people who
know about the script in Braille. The computer based tutor will be able to teach
alphabets in the braille to the blind with the help of a computer and a tutor board whic
intend to develop with some buttons which can be raised or pressed in different pos
patterns and arrangements to resemble the alphabets in the BRAILLE. We are intending
our project should be able to receive the voice commands of different alphabets from
user and generate the corresponding Braille pattern of the raised and pressed button
the board of the BRAILLE TUTOR. The project is definitely be an aid to the blind peop
learn Braille in an efficient and effective way. This will obviously help the blind peop
carry their further studies in Braille. And moreover the project will make the blinds learn BRAILLE without a human tutor. The tutor will also have a second phase in which the
people can check or test themselves for the alphabets they have learnt in BRAILL
pressing the buttons in the BRAILLE TUTOR Board in the Braille script patterns which generate Speech of equivalent alphabet's pronunciation through speaker.
The basic idea behind creating a BRAILLE TUTOR is to use our knowledge in crea
something really useful for the needy and disabled people to facilitate their lives to You're Reading a Preview extent. We really intend to learn and explore the technology, the mathematics and Unlock full access with a free trial.
electronics to create something useful for those who are disabled and are deprived much more in the life. The project will be useful for us to learn and experience our Download With Free Trial electronics and will have a great real life importance in training the Blinds too.
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2. LITERATURE REVIEW:
Documents
The Braille system is a method that is widely used by blind people to read and write.
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was devised in 1821 by Louis Braille, a Frenchman. Each Braille character or cell is made six dot positions, arranged in a rectangle containing two columns of three dots each. 6
may be raised at any of the six positions to form sixty‐four (2 ) permutations, including arrangement in which no dots are raised. There are other Braille tutor in which each letters are written in separate cells
aid is a portable tool (tutor) used as a learning instrument that helps the user deci
Braille without constantly going to the Braille dictionary. The simple and effi construction of this device may make its commercially use in the future .This device computer interface which makes it possible for the computer processing of the statements as well to avoid the use of memory devices and microcontroller.
As that of Braille system a blind aid tool had six buttons that will rise and according to the alphabet .Feeling on the raised buttons student can learn about the language .Some pattern for the Braille alphabets are as: You're Reading a Preview Unlock full access with a free trial.
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In which the pushed buttons are shown by dark spots. The writing mechanics is sam Master your semester with Scribd Read Free Foron 30this Days Sign up to vote title that of the standard Braille system so this Braille tutor teaches the alphabets in the stan & The New York Times Useful Not useful Special offer forformat. students: Only $4.99/month.
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3. METHODOLOGY:
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The several task of this project will be assigned to each team member on the basis of
interest. Weekly meeting will be held to assess the status of each member and pro
restructuring of plan whenever necessary. Project documentation will be performe respective member at the end of each task. Regular discussion with project mentor held during project progress. Our project implements both hardware and software portion. 3.1 Hardware Environment:
The hardware environment in our project consists of a six button Braille board,
motors, optocoupler, PC, speaker, microphone, analog to digital converter, data between PC and peripherals.
PC: It provides the Graphical User interface. It processes the voice signals and iden character . Braille board: It is the six buttons board. The buttons are arranged in 3x2 matrix. This
user’s eye. It converts Braille to Binary data (B2B) so the computer can process the data
buttons can move up and down and the position of up and down buttons defines
character in Braille. When the user presses the buttons down the computer identifies
character and output is heard from speaker. when user spells character thro You're ReadingAgain, a Preview microphone, the computer recognizes the character and ultimately displays it in Unlock full access with a free trial.
board with the help of motors attached to the buttons. So, Braille board is both input output device.
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Optocoupler: In electronics, an optocoupler is a device that uses a short optical transmis
path to transfer an electronic signals between elements of a circuit, typically a transm
and a receiver, while keeping them electrically isolated. Since the electrical sign
converted to a light beam, transferred, then converted back to an electrical signal, the no need for electrical connection between the source and destination circuits. We
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Parallel Port interfacing: A parallel port is a type of interface found on computers
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3.2 Software Environment:
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Matlab Program: It is a commercially available mathematical software package. It is used in academia and industry because of its advanced capabilities and a simple
interface. Matlab also has built‐in toolboxes that contain commonly used enginee
functions. So we will be using Matlab for our testing purpose.It will be our prelimi programming language. Main Programming Language: Our main programming language will be Java or C#. Character Recognition Model:
The first step of digital processing is to convert the time domain signal to frequency dom
The Fourier analyzer calculates the pattern of amplitude for all frequencies in the au range and these sample patterns are compared with the samples in the database and best matched character. Conventional Hidden Markov model (HMM) Modern general‐purpose speech recognition systems are generally based on Hams.
are statistical models which output a sequence of symbols or quantities. One pos
reason why Hams are used in speech recognition is that a speech signal could be viewed
piecewise stationary signal or a short‐time stationary signal. That is, one could assume
short‐time in the range of 10 milliseconds, speech could be approximated as a statio You're Reading a Preview process. Unlock full access with a free trial.
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Mic
ADC
PC Optocoupler Speaker
DC
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motor
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: Path for Voice to Braille Conv
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Conv : Path for Braille to Voice
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General Block Diagram of Proposed System
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Speech Input
Digitization
Spectral content extraction
Mode
Training
Storage Unit
Recognition(x1)
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No
x2
Is
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Yes Not Recognized
Recognized
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Braille Input
Identify the pattern
Does it match
No
Yes
with any character in database?
Wrong pattern pressed
Play through speak
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Download With Free Trial Flow chart of Braille to Speech Conversion
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4.WORK DIVISION
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Work Division
Sampurna Bhattachan
Matlab, C#
Swapnil Ranjit
Vivek Raj Shrestha
C#, SQL
Matlab,C#
Mic Interfacing
Database Management
Port Programming
Speech Recognition Algorithm(Hidden Markov Model)
Graphics User Interface
Braille Board Interfacing
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Sushil
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5. APPLICATION AND SCOPE:
The project is purposed to serve and help the blind people to learn the Nepali Braille without a human tutor. So the project will be very useful for the home users as well
Schools for the Blind. We are making the project practical as much as possible so tha tutor may be used directly to teach the BRAILLE to the blinds. We do not expect our to be used for commercial purpose but to serve the blind people as a Learning aid.
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6.PROJECT SCHEDULE:
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Below is our tentative project schedule:
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Task name
1
Proposal writing
2
Project Research
Jul
Aug
Sept
Oct
Nov
Dec
Learning and coding about 3
Character Recognition
4
Algorithm Development
5
Identifying the component to buy
6
Motor coupling and port interfacing
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Designing and Implementing the circuit
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8
Testing and Debugging
9
System integration
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7. BIBLIOGRAPHY:
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www.wikipedia.org www.google.com
www.uioe.sourceforge.net John Fry, San Jose State University: Digital Signal Processing Nepali Speech Recognition,060BCT Project , IOE
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