BY ABHISHEK POTTER

1. A
Colloquium
On
VOICE BROWSER
Submitted By:
ABHISHEK PRAJAPATI
Under the supervision of
MR. RAKESH KUMAR
DEPARTMENT OF INFORMATION TECHNOLOGY
RAJKIYA ENGINEERING COLLEGE, AMBEDKAR NAGAR (UP)-224122
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2. What is Voice browser?
Why is a Voice browser?
Motivation
W3C Interface Framework.
Voice XML
Speech Recognition Grammar Specification (SRGS)
Semantic Interpretation for Speech Recognition(SISR)
Pronunciation Lexicon Specification (PLS)
Call control
 Applications
Advantages and disadvantages
Conclusion
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3. A voice browser is a software application that presents an
interactive voice user interface to the user in a manner analogous to
the functioning of a web browser.
Dialog documents interpreted by voice browser are often encoded
in standards-based markup languages, such as (VoiceXML).
A voice browser presents information aurally, using pre-recorded
audio file playback or text-to-speech synthesis software.
A voice browser obtains information using speech recognition and
keypad entry, such as DTMF detection.
WHAT IS A VOICE BROWSER?
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4. 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.
Voice input provides direct "see and say" access to links,
eliminating the wrist strain associated with holding the mouse
for often hours at a time.
This is most helpful for the disabled persons.
Why is a Voice Browser?
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5. Far more people today have access to a telephone than have
access to a computer with an Internet connection.
Many of us have already or soon will have a mobile phone within
reach wherever we go.
Voice interaction can escape the physical limitations on keypads
and displays as mobile devices become ever smaller.
Disadvantages to existing methods:WAP (Cellular phones, Palm
Pilots)
1. Access Speed
2. Limited or fragmented availability
3. Price
4. Lack of user habit
MOTIVATION
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6. Differences Between Graphical & Voice
Browsing
Graphical browsing is more
passive due to the persistence of
the visual information.
Graphical Browsers are
client-based.
Voice browsing is more active
since the user has to issue
commands.
whereas Voice Browsers are
server-based.
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7. Semantic
Interpretation
for Speech
Recognition
(SISR)
Pronunciation
Lexicon
Specification
(PLS)
VoiceXML
Speech
Recognition
Grammar
Specification
(SRGS)
W3C Speech Interface Framework
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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. VoiceXML (VXML) is a digital document standard for
specifying interactive media and voice dialogs between humans
and computers.
The VoiceXML document format is based on Extensible
Markup Language(XML).
INTERNET
WEB
SERVER
text.html VOICE Xml
VOICE XML
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10. A speech recognition grammar is a set of word patterns, and tells a
speech recognition system what to expect a human to say.
SRGS specifies two alternate but equivalent syntaxes, one based on
XML, and one using augmented BNF format. In practice, the XML
syntax is used more frequently.
Speech Recognition Grammar Specification
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11.  Semantic Interpretation for Speech Recognition (SISR) defines
the syntax and semantics of annotations to grammar rules in the
Speech Recognition Grammar Specification (SRGS).
It allows voice browsers via ECMAScript to semantically interpret
complex grammars and provide the information back to the
application.
Coders commonly use ECMAScript for client-side scripting on the
World Wide Web, and it is increasingly being used for writing server
applications.
Semantic Interpretation for Speech
Recognition
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12. The Pronunciation Lexicon Specification (PLS) is a W3C
Recommendation which is designed to enable interoperable
specification of pronunciation information for both speech
recognition and speech synthesis engines within voice browsing
applications.
Pronunciations are grouped together into a PLS document which
may be referenced from other markup languages.
PRONUNCIATION LEXICON
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13. CCXML is designed to inform the voice browser how to handle
the telephony control of the voice channel.
The two XML applications are wholly separate and are not
required by each other to be implemented - however, they have been
designed with interoperability in mind
CALL CONTROL
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Working of Voice Browser
HELLO
HELLO

15. Accessing business information:
1. The corporate "front desk" which asks callers who or what they wa
2. Automated telephone ordering service .
3. Airline arrival and departure information.
4. Home banking services.
Accessing public information:
Application
1. Community information such as weather, traffic condition,
school closures, directions and events.
2. Local, national and international news.
3. National and international stock market information.
4. Business and e-commerce transactions.
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16. 1. Voice mail.
2. Calendars, address and telephone lists
3. Personal horoscope.
4. Personal newsletter.
5. To-do lists, shopping lists, and calorie counters.
 Accessing personal information:
Application
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17. Advantages of Voice Browser
Voice is very natural user interface which speeds up browsing.
Less space requirements.
Portable voice browser can also be implemented.
Practical interface for blind users.
User can browse web while keeping there hands and eyes for
other jobs.
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18. Disadvantages of voice browser
This is useful if only a restricted volume of phrases and sentences
is used.
It require large storage.
Limited vocabulary.
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19. If voice browsers are meant to replace human operator dialog,
they must be fast in response.
Speech Recognition / Interpretation / Synthesis depend on
implementation
When a user requests a certain document, several related
documents can be downloaded for easier access.
CONCLUSION
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20. https://en.wikipedia.org/wiki/Voice_browser
www.w3.org/standards/webofdevices/voice
www.pcworld.com/article/230305/google
www.hwg.org/opcenter/w3c/voicebrowsers.html
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