Voice recognition

Fahad Alam Joy
2016-1-55-005
Sourav Bhattacharjee
2016-1-55-013
Sadia Khan Tanha
2015-2-55-017
Saima Akter Urme
2016-1-53-025
Farhana Jahan
2016-1-55-023

T I M E L I N E
2
 Introduction
 Advantages
&
Disadvantages History
 Types and
example How it works?  Application

What is Voice Recognition?
 Voice recognition is a computer software program or hardware device
Which can decode the human voice.
 Used to operate a device perform commands or write without having to
use a key board, Mouse, or press any button

History
 In the history of speech recognition software technology, this was the era
of 'baby talk'; only numbers and digits could be comprehended. In 1952,
‘Audrey’ was invented by Bell Laboratories which could only understand
numbers.
 But in 1962, the ‘shoebox’ technology was able to understand 16 words in
English. Later, voice recognition was enhanced to comprehend 9
consonants and 4 vowels.

What does voice recognition require?
 For voice recognition to work you
must have a computer with a sound
card and either a microphone or
a headset.
 Other devices like smart phones have
all of the necessary hardware built
into the device.

Types of voice recognition systems
 Speaker dependent system .
 Speaker independent system .
 Discrete speech recognition .
 Continuous speech recognition .
 Natural language

Example of voice recognition
 Automated phone systems - Many companies today use phone
systems that help direct the caller to the correct department. If you
have ever been asked something like "Say or press number 2 for
support" and you say "2," you used voice recognition.
 Google Voice - Google voice is a service that allows you to search and
ask questions on your computer, tablet, and phone.

 Siri - Apple's Siri is another good example of voice recognition that helps
answer questions on Apple devices.
 Car Bluetooth - For cars with Bluetooth or Handsfree phone pairing you
can use voice recognition to make commands such as "call my wife" to
make calls without taking your eyes off the road.
 Cortana- Cortana is a virtual assistant created by Microsoft for Windows
10

How does Voice recognition work?
 When you speak , you create vibration in the air. The analog to digital
converter ( ADC) Translates this analog wave into digital data that the
computer can understand

Advantages of Speech Recognition
 Increases productivity
 Can help with menial computer tasks, such as browsing and scrolling
 Can help people who have trouble using their hands
 Can help people who have cognitive disabilities
 Has long term benefits for students
.

Disadvantages of Voice recognition
 Can be hacked with prerecorded verbal messages
 Has an initial period of adjusting to each user's voice
 Less accurate when there is background noise
 Can be distracting in a cubicle environment
 The company Nuance is one of the last companies producing the
software and is essentially a monopoly

Application
 Solving Crimes With Voice Recognition
 Letting Your Voice Protect Your Bank Account
 Buying Products and Services With The Sound of Your Voice
 A Hands free AI Assistant That Knows Who You Are

Recent Improvements in Voice Recognition
 Faster Training
 Better Recognition
 More compatible software
 Better system control/command

Reference:
 Wikipedia
 www.computerhope.com
 https://www.youtube.com
 https://www.quora.com/How-does-Siri-work-2

Voice recognition

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Voice recognition