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Voice Operated Information System (VOIS) for Driver's Information Guidance System


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Suggested Citation:
Reddy, Prasuna D., Ryuichi Kitamura, Paul P. Jovanis (1994) Voice Operated Information System (VOIS) for Driver's Information Guidance System. Institute of Transportation Studies, University of California, Davis, Presentation Series UCD-ITS-RP-94-17

Moving Toward Deployment: Proceedings, IVHS America 1994 Annual Meeting, Atlanta, GA. Vol. 2

This paper describes work performed at UC Davis called Voice Operated Information System (VOIS) project in the area of Advanced Travel Information Systems (ATIS) as a part of IVHS. The principal aims of this work were to develop a habitable interface for the untrained user (driver), and to investigate the degree to which dialogue control can be used to compensate for deficiencies in information systems interfaces.

To give focus to our work, we have concentrated on a pre-trip planning/en-route advice context. However, the techniques developed are believed to be equally applicable to a wide range of other information systems (electronic yellow pages, route guidance system, etc.).

In this work more emphasis is placed on media to interface with information systems. In other words the database is small and options are few in the information system. But the object of this study is to concentrate on the benefits and difficulties in using voice as a user interface media.

The dialogue controller is an independent unit with well-defined interfaces to the other system components. The Dialogue controller outputs a question to the speech output subsystem, and simultaneously outputs a set of syntax rules to the speech input system. These rules define the subset of the total user input language which the dialogue controller is prepared to interpret at that point in the dialogue. Using these rules as guidance, the speech input subsystem processes the user's response and returns it to the dialogue controller as a frame-like structure. These frames have information about user request. The Dialogue controller interprets the reply frame and the cycle then repeats until the user's query is fully established.

The above outline presents the broad framework in which we have addressed the dialogue controlled pre-trip planning information systems. These systems are very useful because there is no need for the driver to divert his concentration to use the information system. Once this system is fully established, we are planning to use it as one of our prime user interfaces for all the prototype developments.