The philips/RWTH system for transcription of broadcast news
Peter Beyerlein, Xavier L. Aubert, Reinhold Haeb‐Umbach, Matthew Harris, Dietrich Klakow, Andreas Wendemuth, Sirko Molau, Michael Pitz, Achim Sixtus · 1999
This paper contains a description of the Philips/RWTH 1998 HUB4 system which has been build in a joint eort of Philips Research Laboratories Aachen and Aachen University o f T echnology.We will focus our discussion on recent improvements compared to the original 1997 HUB4 system and evaluate them on the HUB4'97 evaluation data.The paper will deal with 1. a rough system overview including feature extraction, acoustic training, audio stream segmentation, and decoding 2. log-linear interpolation of distance-language models, 3. and the integration of various acoustic and language models via Discriminative Model Combination (DMC).The performance of the described system is 23% (relative) better than the performance of the 1997 Philips HUB4 system.A w ord error rate of 17.9% was achieved on the 1997 HUB4 evaluation set, compared to 23.5% using the original 1997 system.