Minimum word error training of long short-term memory recurrent neural network language models for speech recognition

Takaaki Hori; Chiori Hori; Shinji Watanabe; John R. Hershey

doi:10.1109/ICASSP.2016.7472827

Minimum word error training of long short-term memory recurrent neural network language models for speech recognition

Takaaki Hori, Chiori Hori, Shinji Watanabe, John R. Hershey

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

8 Citations (Scopus)

Abstract

This paper describes minimum word error (MWE) training of recurrent neural network language models (RNNLMs) for speech recognition. RNNLMs are usually trained to minimize a cross entropy of estimated word probabilities against the correct word sequence, which corresponds to maximum likelihood criterion. However, this training does not necessarily maximize a performance measure in a target task, i.e. it does not minimize word error rate (WER) explicitly in speech recognition. To solve such a problem, several discriminative training methods have already been proposed for n-gram language models, but those for RNNLMs have not sufficiently investigated. In this paper, we propose a MWE training method for RNNLMs, and report significant WER reductions when we applied the MWE method to a standard Elman-type RNNLM and a more advanced model, a Long Short-Term Memory (LSTM) RNNLM. We also present efficient MWE training with N-best lists on Graphics Processing Units (GPUs).

Original language	English
Title of host publication	2016 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	5990-5994
Number of pages	5
Volume	2016-May
ISBN (Electronic)	9781479999880
DOIs	https://doi.org/10.1109/ICASSP.2016.7472827
Publication status	Published - 2016 May 18
Externally published	Yes
Event	41st IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Shanghai, China Duration: 2016 Mar 20 → 2016 Mar 25

Other

Other	41st IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016
Country	China
City	Shanghai
Period	16/3/20 → 16/3/25

Keywords

Long short-term memory
Minimum word error training
Recurrent neural network language model
Speech recognition

ASJC Scopus subject areas

Signal Processing
Software
Electrical and Electronic Engineering

Access to Document

10.1109/ICASSP.2016.7472827

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Cite this

Hori, T., Hori, C., Watanabe, S., & Hershey, J. R. (2016). Minimum word error training of long short-term memory recurrent neural network language models for speech recognition. In 2016 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Proceedings (Vol. 2016-May, pp. 5990-5994). [7472827] Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ICASSP.2016.7472827

Minimum word error training of long short-term memory recurrent neural network language models for speech recognition. / Hori, Takaaki; Hori, Chiori; Watanabe, Shinji; Hershey, John R.

2016 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Proceedings. Vol. 2016-May Institute of Electrical and Electronics Engineers Inc., 2016. p. 5990-5994 7472827.

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Hori, T, Hori, C, Watanabe, S & Hershey, JR 2016, Minimum word error training of long short-term memory recurrent neural network language models for speech recognition. in 2016 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Proceedings. vol. 2016-May, 7472827, Institute of Electrical and Electronics Engineers Inc., pp. 5990-5994, 41st IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016, Shanghai, China, 16/3/20. https://doi.org/10.1109/ICASSP.2016.7472827

Hori T, Hori C, Watanabe S, Hershey JR. Minimum word error training of long short-term memory recurrent neural network language models for speech recognition. In 2016 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Proceedings. Vol. 2016-May. Institute of Electrical and Electronics Engineers Inc. 2016. p. 5990-5994. 7472827 https://doi.org/10.1109/ICASSP.2016.7472827

Hori, Takaaki ; Hori, Chiori ; Watanabe, Shinji ; Hershey, John R. / Minimum word error training of long short-term memory recurrent neural network language models for speech recognition. 2016 IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2016 - Proceedings. Vol. 2016-May Institute of Electrical and Electronics Engineers Inc., 2016. pp. 5990-5994

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AB - This paper describes minimum word error (MWE) training of recurrent neural network language models (RNNLMs) for speech recognition. RNNLMs are usually trained to minimize a cross entropy of estimated word probabilities against the correct word sequence, which corresponds to maximum likelihood criterion. However, this training does not necessarily maximize a performance measure in a target task, i.e. it does not minimize word error rate (WER) explicitly in speech recognition. To solve such a problem, several discriminative training methods have already been proposed for n-gram language models, but those for RNNLMs have not sufficiently investigated. In this paper, we propose a MWE training method for RNNLMs, and report significant WER reductions when we applied the MWE method to a standard Elman-type RNNLM and a more advanced model, a Long Short-Term Memory (LSTM) RNNLM. We also present efficient MWE training with N-best lists on Graphics Processing Units (GPUs).

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