Creating and sharing knowledge for telecommunications

Training A Robust Command Recognizer with the Tecnovoz Database

Lopes, J. ; Neves, C. ; Veiga, A. ; Maciel, A. M. ; Lopes, C. ; Sá, L. V. ; Perdigão, F.

Training A Robust Command Recognizer with the Tecnovoz Database, Proc Jornadas en Tecnología del Habla - JTH, Bilbao, Spain, Vol. -, pp. - - -, November, 2008.

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Abstract
This paper describes a command-based robust speech recognition system for the Portuguese language. The system is speaker independent, robust to noise and operates in real-time in an embedded hardware platform. The paper addresses the description of a European Portuguese database collected specifically for the command-based recognition task, the training of the acoustic models, a new noise-robust front-end and the recognizer’s confidence measure. Performance tests show that improvements of the recognition rate are achieved using triphone models rather than whole-word models.