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DUST
Duplex Universal Speech and Text
e-Inclusion
The work of STF 267
A project funded by the European Union
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
Text communication for all "DUST"
2
The Team
Wally Mellors - STF leader
Scott Cadzow
Ed Fitzgerald
Gunnar Hellstrom
Text communication for all "DUST"
3
Text user requirements
To have equal accessibility
To be able to communicate with
others worldwide
As easily as speech communication
Text communication for all "DUST"
4
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
Text communication for all "DUST"
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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
Text communication for all "DUST"
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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 girlfriend’s birthday and I’ll repay the favour – please!
Claude - In Paris - Back on Monday says:
No!! George phoned and said he couldn’t 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?
Text communication for all "DUST"
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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!
Text communication for all "DUST"
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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 can’t talk to one another
Text communication for all "DUST"
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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
Text communication for all "DUST"
10
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
Text communication for all "DUST"
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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
Text communication for all "DUST"
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Services
Basic call
Supplementary services. Hold, transfer, etc
Emergency service 112
Relay service with text support
Text <> voice
Hard to understand speech <> clear
speech
Sign language <> voice
Interoperability between DUST Host
environments
Interoperability with legacy systems
Text communication for all "DUST"
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Coexistence via Gateway functions
Textphone
PSTN
IP Network
Gateway
DUST terminal
Text communication for all "DUST"
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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
Text communication for all "DUST"
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This is the future
Fixed textphone user
Fixed Network
Cellular Network
Mobile,
text capable
terminals
Fixed multimedia user
IP textphone or multimedia
user
IP
network
Cellular Network
Text communication for all "DUST"
16
We work towards it
Thank you for listening