Language-Model Investigations related to Broadcast News

In this paper we present some experiments that have been performed while developing language models for the PHILIPS Broadcast News system. Three main issues will be discussed: construction of phrases, adaptation of remote corpora to this task, and the combination of the different models. Also, perplexities on the 1997 evaluation data are reported.

[1]  Salim Roukos,et al.  Language model adaptation via minimum discrimination information , 1995, 1995 International Conference on Acoustics, Speech, and Signal Processing.

[2]  Alexander H. Waibel,et al.  Class phrase models for language modeling , 1996, Proceeding of Fourth International Conference on Spoken Language Processing. ICSLP '96.

[3]  Reinhard Kneser,et al.  Statistical language modeling using a variable context length , 1996, Proceeding of Fourth International Conference on Spoken Language Processing. ICSLP '96.

[4]  Jean-Luc Gauvain,et al.  Transcribing Broadcast News: The LIMSI Nov96 Hub4 System , 1997 .

[5]  Dietrich Klakow.  Language-model optimization by mapping of corpora , 1998, Proceedings of the 1998 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP '98 (Cat. No.98CH36181).

[6]  Reinhard Kneser,et al.  On the dynamic adaptation of stochastic language models , 1993, 1993 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[7]  Kyuwoong Hwang.  Vocabulary optimization based on perplexity , 1997, 1997 IEEE International Conference on Acoustics, Speech, and Signal Processing.

[8]  Dietrich Klakow,et al.  Language model adaptation using dynamic marginals , 1997, EUROSPEECH.