Voice Browser

A voice browser is a device  that interprets voice input and interprets voice markup languages to generate voice output. It  interprets a script which specifies exactly what to verbally present to the user as well as when to present each piece of information.

What is “Voice Browser”

•  A software application

•  Works with various markup languages

•   Interpret voice input and generate voice output.
  

  How Voice Browser works?

Actually working on five markup languages:

1. Natural Language Semantics Markup Language
2.  Dialog Markup Language
3.  Text-to-Speech Markup Language
4.  Multi-Modal Markup Language
   Key Technologies:
   •   Speech Recognition
   •   Speech Synthesis

   Speech Recognition : Voice input ->VoXML  file -> Text. 
   

                Speech Synthesis: Text  -> VoXML file -> Output(Pre-recorded)

Possible Application:

i. Accessing business information:

•  The corporate “front desk” which asks callers who or what they want
• Automated telephone ordering services
• Support desks
• Order tracking
• Airline arrival and departure information
• Cinema and theater booking services
• Home banking services

ü Accessing public information:

• Community information such as weather, traffic conditions, school closures, directions and events
• Local, national and international news
• National and international stock market information
• Business and e-commerce transactions

iü Accessing personal information:

• Voice mail
• Calendars, address and telephone lists
• Personal horoscope
• Personal newsletter
• To-do lists, shopping lists, and calorie counters

Benefits:

•   Voice is a very natural user interface which speeds up browsing.

•   Fewer space requirements.

•   Portable voice browsers can also be implemented.

•   Practical interface for functionally blind users.

•   Users can browse the web while keeping their hands and eyes for other jobs.

•   Access to telephones and wireless phones than to desktop browsers.

•   Hands-free access is needed.

•   Easy to use – for people with no knowledge or fear of computers.

FUTURE DIRECTIONS AND ISSUES

 It  is much more  to  a  voice  browser  being  usable  than  devising  a  speech markup  language  or mimicking  a telephone  voice  response  system.  Using  audio  only  to  browse  the Web  is  much  more  than  adding  multimedia capabilities  to  a  visual  browser.  The  following  summarizes  some  future  research  directions  to  make voice browsers a reality:

• The problem of intelligently speaking a heavily formatted page that uses tables inside tables inside tables.
• Better WWW programming languages.
•  Speaker verification for secure access.
•  Requirements for interoperable mechanisms for controlling synthetic speech engines using a markup language, style sheets or scripting.
•  Support for multilingual documents.
•  Ability to include non-speech audio samples (branding).

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Mohit Arora

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