Stand alone system

Team members

PC dependent

Speech recognition

Problems Dependency on computer High error percentage Doesn’t support Arabic language Low security

What To Do?

Stand Alone Arabic Voice recognition

Features Suit disable Wireless Feedback Security Arabic speaker

Methodology: Stand alone recognizer With shield network Mechanical system Without shield Data analysis

Stage # one:  Arduino without shield recognizer

Goal.

Arduino without shield recognizer f(x) User System Record the signal power System

Speech divided to three basic types of phonemes:  Vowels (o,a,e,i)  low frequency  Fricatives (s, z,f)  high frequency  Plosives (p, b)  high frequency

Creating the recognizer:  The first step Measuring the volume of the microphone for our system. Measuring each phonetic threshold. ee = e = i  econstant a = o =r = l  aconstant z = v = w  vconstant s = sh = ch  shconstant f  fconstant

Demo 1

 The second step we measured the threshold average for each phonetic taken from 10 different people:

Strength and weakness in the design.  It can be used to make speaker recognition by creating vocabulary to the user and measure each phonetic power.  The system is only able to differentiate between fricatives and voiced fricatives (like f and s).

Constrains.

Stage # two: Arduino with shield recognizer.

Goal.  Increase the performance of the system.

The approach  Preparing the system : Record the voice Signal processing Save properties on data base

Recognition Detect the signal Fetch its properties Compare and take decision

 demo4

analysis Trial and success:  percentage of success trials for two users Command #1(open door) Command #2( افتح الباب ) User #1 30%45% User #2 25%50%

Acceptable Confidence Level. Minimum Audio Level. Audio Level Activated Period.

 percentage of success for advanced trials for two users Command #1(open door) Command #2( افتح الباب ) User #165%80% User #270%78%

 waveform with time of "led on" in quit environment

 waveform with time of "led on" in noisy environment

Constrains.

Stage # three: Zigbee network.

goal  Optimum wireless connection.

Stage # four: Controlling.

Step # one: control AC devices. Control light. Arduino controls a power 4400 times its own power.

Step # two: Control mechinecal devices.  DC motors.

 demo

Constrains.

Business model.

The expected costs of recognizer. Standalone recognizer Standalone recognizer with zigbee Network Prototype Cost80 $126 $76*n Final production cost $21 $13*n Selling cost30 $63 $39*n $