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Voice Browser
By
Praveen Kumar Mutcharla
&
Ramanuja SVL
Contents in Presentation
 Introducing Voice Browser
 Differences between Graphical and Voice Browser
 Why a voice browser?
 W3C Standards
 W3C Speech Interface Framework
 Speech Recognition Grammar Specification
 Semantic Interpretation
 Pronunciation Lexicon Analysis
 VoiceXML
 Functionality
 Applications
 Conclusion
Introducing Voice Browser
 As the name suggests Voice Browser uses
Voice to navigate a web application.
 This works similar to graphical web
browser, as a result any telephone can be
used to access appropriately designed
Web-based services.
 In essence, a voice browser is a software
application that presents an interactive
voice user interface
Differences Between
Graphical and Voice Browser
 Graphical
browsing is
passive.
 Keyboard
commands are
required for
Graphical
browser.
 Voice browsing
is an active
process.
 Voice is medium
to communicate
with an
application.
WHY A VOICE BROWSER?
 Use of the hands during browsing might
prove inconvenient or impossible. Voice
input is a natural solution for such ands-
busy situations.
 Even in standard browser applications,
using voice input is simply more fun than
the alternatives.
 Browser replaces the mouse in most
instances to enable hands-free browsing.
Use Cases:
 Easy to use - for people with no knowledge or fear
of computers.
 Many companies offer services over the phone via
IVR . With the advent of Voice Browsers ,they will
become next generation Voice Web portals to the
company's services and related websites, whether
accessed via the telephone network or via the
Internet.
W3C STANDARDS
 The World Wide Web Consortium (W3C)
develops interoperable technologies
(specifications, guidelines, software, and
tools) to lead the Web to its full potential
as a forum for information, commerce,
communication, and collective
understanding.
W3C Speech Interface
Framework
Speech
Recognition
Grammar
Specification
(SRGS)
Semantic
Interpretation for
speech
recognition
(SISR)
Pronunciation
Lexicon
Specification(PLS)
VoiceXML
Speech Recognition Grammar
Specification (SRGS)
 A document language that can be used by
developers to specify the words and
patterns of words to be listened for by a
speech recognizer or other grammar
processor.
SEMANTIC INTERPRETATION
FOR SPEECH RECOGNITION
 The recognition process matches an
utterance to a speech grammar, building a
parse tree as a byproduct.
 There are two approaches to harvesting
semantic results from the parse tree:
 Annotating grammar rules with semantic
interpretation tags.
 Representing the result in XML.
PRONUNCIATION LEXICON
SPECIFICATION
 A representation of phonetic information
for use in speech recognition and
synthesis.
 Application developers sometimes need to
ability to tune speech engines, whether
for synthesis or recognition.
VOICEXML
 VoiceXML is a dialog markup language
designed for telephony applications, where
users are restricted to voice and DTMF
(touch tone) input.
 There are other languages: VoXML.
A Sample VXML Code
<vxml version=“2.0”
xmlns=http://www.w3.org/2001/vxml>
<form>
<block>
<prompt>
Hello world!
</prompt>
</block>
</form>
</vxml>
FUNCTIONALITY
 Communication from the user to the system is made by
issuing voice commands.
 A grammar set is defined to recognise these commands.
 There are few rules that are used to navigate the
webpage.
 Below are a few administrative controls:
Speak
Where am I?
What is my home page?
APPLICATIONS
 Google’s-Google now can be considered as
one of the best delivered application as
of yet.
 Though it is not as functional as a
graphical browser, it is somewhat similar.
 Some other applications are:
 IOS’s: Siri
 Windows: Cortana
Processing of Google Now
CONCLUSION
 In order to make technology more familiar to the
user its access should be made much easier.
 It is know that visual internet access experiences
various limitations such as people who are
physically handicapped (especially blind users)
cannot use keypads or touch screens for giving
instructions.
 Above all these limitations today’s generation
demands to use internet independent of PC’s and
also hands free access to it.
 For this VOICE BROWSING is an intelligent idea.
Voice Browser
Voice Browser

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Voice Browser

  • 1. Voice Browser By Praveen Kumar Mutcharla & Ramanuja SVL
  • 2. Contents in Presentation  Introducing Voice Browser  Differences between Graphical and Voice Browser  Why a voice browser?  W3C Standards  W3C Speech Interface Framework  Speech Recognition Grammar Specification  Semantic Interpretation  Pronunciation Lexicon Analysis  VoiceXML  Functionality  Applications  Conclusion
  • 3. Introducing Voice Browser  As the name suggests Voice Browser uses Voice to navigate a web application.  This works similar to graphical web browser, as a result any telephone can be used to access appropriately designed Web-based services.  In essence, a voice browser is a software application that presents an interactive voice user interface
  • 4. Differences Between Graphical and Voice Browser  Graphical browsing is passive.  Keyboard commands are required for Graphical browser.  Voice browsing is an active process.  Voice is medium to communicate with an application.
  • 5. WHY A VOICE BROWSER?  Use of the hands during browsing might prove inconvenient or impossible. Voice input is a natural solution for such ands- busy situations.  Even in standard browser applications, using voice input is simply more fun than the alternatives.  Browser replaces the mouse in most instances to enable hands-free browsing.
  • 6. Use Cases:  Easy to use - for people with no knowledge or fear of computers.  Many companies offer services over the phone via IVR . With the advent of Voice Browsers ,they will become next generation Voice Web portals to the company's services and related websites, whether accessed via the telephone network or via the Internet.
  • 7. W3C STANDARDS  The World Wide Web Consortium (W3C) develops interoperable technologies (specifications, guidelines, software, and tools) to lead the Web to its full potential as a forum for information, commerce, communication, and collective understanding.
  • 8. W3C Speech Interface Framework Speech Recognition Grammar Specification (SRGS) Semantic Interpretation for speech recognition (SISR) Pronunciation Lexicon Specification(PLS) VoiceXML
  • 9. Speech Recognition Grammar Specification (SRGS)  A document language that can be used by developers to specify the words and patterns of words to be listened for by a speech recognizer or other grammar processor.
  • 10. SEMANTIC INTERPRETATION FOR SPEECH RECOGNITION  The recognition process matches an utterance to a speech grammar, building a parse tree as a byproduct.  There are two approaches to harvesting semantic results from the parse tree:  Annotating grammar rules with semantic interpretation tags.  Representing the result in XML.
  • 11. PRONUNCIATION LEXICON SPECIFICATION  A representation of phonetic information for use in speech recognition and synthesis.  Application developers sometimes need to ability to tune speech engines, whether for synthesis or recognition.
  • 12. VOICEXML  VoiceXML is a dialog markup language designed for telephony applications, where users are restricted to voice and DTMF (touch tone) input.  There are other languages: VoXML.
  • 13. A Sample VXML Code <vxml version=“2.0” xmlns=http://www.w3.org/2001/vxml> <form> <block> <prompt> Hello world! </prompt> </block> </form> </vxml>
  • 14. FUNCTIONALITY  Communication from the user to the system is made by issuing voice commands.  A grammar set is defined to recognise these commands.  There are few rules that are used to navigate the webpage.  Below are a few administrative controls: Speak Where am I? What is my home page?
  • 15. APPLICATIONS  Google’s-Google now can be considered as one of the best delivered application as of yet.  Though it is not as functional as a graphical browser, it is somewhat similar.  Some other applications are:  IOS’s: Siri  Windows: Cortana
  • 17. CONCLUSION  In order to make technology more familiar to the user its access should be made much easier.  It is know that visual internet access experiences various limitations such as people who are physically handicapped (especially blind users) cannot use keypads or touch screens for giving instructions.  Above all these limitations today’s generation demands to use internet independent of PC’s and also hands free access to it.  For this VOICE BROWSING is an intelligent idea.