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MUST - Multimodal, multilingual  information Services for small mobile Terminals
For further information please contact:

Project Supervisor
Wieblinger Weg 19/4
69123 Heidelberg, Germany

MUST Brochure (pdf)

MUST Presentation (pdf)

MUST Brochure

Multimodal Interaction – Will Users Tap and Speak Simultaneously?
Article based on Eurescom project MUST (P1104), Telektronikk 2/2003 (PDF)

Speech Centric Multimodal Interfaces for Mobile Communication Systems
Article including  MUST results, Telektronikk 2/2003 (PDF)


Project Information
What was this Project about?

Mobile Internet Access is expected to grow very fast in the near future, fostered by speech access to the Internet through Voice Portals and fast mobile Internet in the UMTS networks. A recent market study estimates the volume of the V-commerce market in the USA alone at a value of over 50 billion dollars by the year 2005. UMTS will increase the growth of mobile access to services. Typically, mobile terminals have small screens and keyboards, which makes them difficult to use in transaction and information services that require free text input or output of complex information that is only available in textual form. Implementation of speech and language technologies in a clever way will help to solve this problem.

Speech recognition and dialogue management may be used to overcome part of the input problem (just say what you want), and language technologies like (multilingual) information extraction may be used to retrieve condensed representations that fit the small screen.  In its most basic form speech input/output can be used as an overlay for keyboard input and screen output. Yet, it is generally agreed that clever combination of speech, text and graphics in the user interface will improve the usability of mobile information services. Substantial Human Factors research is still needed to understand how speech and language technology must be used in the servers and in the mobile terminals to be able to develop high quality multimodal interfaces.

What does "multimodal" mean:
Multimodality means that more than one sense is involved in the interaction process (e.g. speech input and text output, or clicking and speaking at the same time).

What are the main objectives of this Project?

  • Obtain a better understanding of the role that language and speech technology will play in future multimodal and multilingual services in the mobile networks accessed from small terminals, of the requirements that the technology must meet and the knowledge and expertise that the Telcos must build to be able to make optimal use of the technologies
  • Getting hands-on experience by integrating existing speech and language technologies into an experimental multimodal interface to a realistic demonstrator
  • Use the demonstrator to conduct human factor experiments with ‘real’ users to assess the value of the language and speech technologies for fast, simple and user-friendly interfaces on small mobile devices.

What are the key results of this Project?

The key results of the project are insight in the possibilities of new speech and language technologies for user-friendly interfaces for small mobile devices. Both technical and implementation issues, and usability issues were dealt with.  To achieve those results, a PDA based demonstrator with a map based tourist application in Paris was implemented.

What relationship exists to other organisations or bodies?

The project interacted with the Eurescom Projects P1105 ("MOBILUS") and P1119 ("The third dimension").

Project Results
Deliverable Title  No Type Planned issue date
Multimodal Services - A MUST for UMTS D1 Tech Info 31 Dec 2001
Specification and implementation of the demonstrator D2 Tech Info 31 Aug 02
Usability evaluation of a multimodal and multilingual service on a small mobile terminal D3 Proj Report February 2003