Digital Signal Processing Reference
In-Depth Information
Chapter 5
ROBUST DIALOG MANAGEMENT
ARCHITECTURE USING VOICEXML FOR CAR
TELEMATICS SYSTEMS
Yasunari Obuchi
1
, Eric Nyberg
2
, Teruko Mitamura
2
, Scott Judy
2
, Michael
Duggan
3
, Nobuo Hataoka
4
1
Advanced Research Laboratory, Hitachi Ltd., Kokubunji, Tokyo 185-8601, Japan,;
2
Language Technologies Institute, Carnegie Mellon University, Pittsburgh, PA 15213, USA;
3
Software Engineering Institute, Carnegie Mellon University, Pittsburgh, PA 15213, USA;
4
Central Research Laboratory, Hitachi Ltd., Kokubunji, Tokyo 185-8601, Japan
Email: obuchi@rd.hitachi.co.jp
Abstract:
This chapter describes a dialog management architecture for car telematics
systems. The system supports spontaneous user utterances and variable
communication conditions between the in-car client and the remote server. The
communication is based on VoiceXML over HTTP, and the design of the
server-side application is based on DialogXML and ScenarioXML, which are
layered extensions of VoiceXML. These extensions provide support for state-
and-transition dialog programming, access to dynamic external databases, and
sharing of commonly-used dialogs via templates. The client system includes a
set of small grammars and lexicons for various tasks; only relevant grammars
and lexicons are activated under the control of the dialog manager. The server-
side applications are integrated via an abstract interface, and the client system
may include compact versions of the same applications. The VoiceXML
interpreter can switch between applications on both sides intelligently. This
helps to reduce bandwidth utilization, and allows the system to continue even if
the communication channel is lost.
Keywords:
VoiceXML, Dialog Management, Telematics, Speech Recognition.
