INTERSPEECH 2007
8th Annual Conference of the International Speech Communication Association

Antwerp, Belgium
August 27-31, 2007

Automated Directory Assistance System - From Theory to Practice

Dong Yu, Yun-Cheng Ju, Ye-Yi Wang, Geoffrey Zweig, Alex Acero

Microsoft Research, USA

The automated directory assistance system (ADAS) is traditionally formulated as an automatic speech recognition (ASR) problem. Recently, it has been formulated as a voice search problem, where a spoken utterance is firstly converted into text, which in turn is used to search for the listing. In this paper, we focus on the design and development of the utterance-to-listing component of ADAS. We show that many theoretical and practical issues need to be resolved when applying the basic idea of voice search to the development of ADAS. We share our experiences in addressing these issues, especially in pre-processing the listing database, generating a high performance LM, and developing efficient, accurate, and robust search algorithms. Field tests of our prototype system indicate that an 81% task completion rate can be achieved.

Full Paper

Bibliographic reference.  Yu, Dong / Ju, Yun-Cheng / Wang, Ye-Yi / Zweig, Geoffrey / Acero, Alex (2007): "Automated directory assistance system - from theory to practice", In INTERSPEECH-2007, 2709-2712.