DUST Duplex Universal Speech and Text e-Inclusion

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DUST Duplex Universal Speech and Text
e-Inclusion

• The work of STF 267
• A project funded by the European Union

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This presentation

• Describes what is needed
• Describes challenges of texting
• Suggests how to overcome them
• Describes some history of the present situation
• Describes the DUST concept
• Describes some implementations
• Outlines the ETSI Guide

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The Team

• Wally Mellors - STF leader
• Scott Cadzow
• Ed Fitzgerald
• Gunnar Hellstrom

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Text user requirements

• To have equal accessibility
• To be able to communicate with others worldwide
• As easily as speech communication

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What is needed

• Conversation in real time by text and voice
• Duplex working (two way simultaneous)
• Simple call set up and clear down
• Progress information in text form
• Provision of relay services
• Access to emergency services
• Provision for signing and lipreading
• Similar to an ordinary telephone call

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The challenge of texting

• Instant messaging and SMS are popular text
  services
• They are not equivalent to Voice telephony
• No natural conversation flow
• Is an answer coming?
• Shall I send more text?
• Resulting in disjointed conversation
• Conversational Text is needed to complete the
  suite of telecom services

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Problems with fluency

• Simon In the office... says
• Hi - How is your meeting going? Well?

Claude - In Paris - Back on Monday says Yes -
all is fine!
Simon In the office... says Is George in the
same meeting?
Simon In the office... says Could you bring
something back from Paris for me?
Claude - In Paris - Back on Monday says No!
Simon In the office... says Oh but its for
my girlfriends birthday and Ill repay the
favour please!
Claude - In Paris - Back on Monday says No!!
George phoned and said he couldnt make it as he
is sick! Something he ate.
Claude - In Paris - Back on Monday says Sorry.
What is it you want me to get for your girlfriend?
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What is text conversation?

• Text appears at each end character by character
  as it is typed
• The two parties have the feeling of being in
  continuous contact
• Just as in a spoken conversation

User A
User B
Why do you need character by
character transmission? Because then you get
a feeling of being continuously in touch.
Yes, I see, I can
almost read your thoughts as

you express them. No waiting. Good!
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A bit of history

• Text telephony started in America with old
  teletype machines in the 1960s
• Various other Countries started with newer
  improved terminals
• Unfortunately - There was no harmonisation
• Result 5 different systems in Europe
• Worse They cant talk to one another

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Result

• Deaf users caught up in generally national
  systems
• With full text access limited to other deaf
  textphone users
• Seven kinds of legacy PSTN textphones
• Will not disappear tomorrow
• ITU-T V.18 compatible with all
• Most deaf users do not have access to 112
  emergency services

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The DUST concept

• D - Duplex simultaneous send and receive
• U Universal - Worldwide on all networks
• S Speech in both directions
• T Text with conversational flow

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The DUST service

• Simultaneous text and voice no mode switching
• In a mainstream environment
• Using only open and available standards
• Duplex no need for turn taking
• Easy call set - up
• Full network services
• Supplementary services
• Emergency calls
• Provision for multimedia

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Services

• Basic call
• Supplementary services. Hold, transfer, etc
• Emergency service 112
• Relay service with text support
• Text ltgt voice
• Hard to understand speech ltgt clear speech
• Sign language ltgt voice
• Interoperability between DUST Host environments
• Interoperability with legacy systems

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Coexistence via Gateway functions
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The Future

• Text Conversation available to ALL
• Across all networks
• Using open and available standards
• All terminals interwork
• Full legacy support
• Texting anywhere anytime
• With voice available
• And with Video for signing and lipreading

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This is the future
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We work towards it

• Thank you for listening