Publication detail

Speech Enhancement Using End-to-End Speech Recognition Objectives

SUBRAMANIAN, A. WANG, X. BASKAR, M. WATANABE, S. TANIGUCHI, T. TRAN, D. FUJITA, Y.

Original Title

Speech Enhancement Using End-to-End Speech Recognition Objectives

Type

conference paper

Language

English

Original Abstract

Speech enhancement systems, which denoise and dereverberate distorted signals, are usually optimized based on signal reconstruction objectives including the maximum likelihood and minimum mean square error. However, emergent end-to-end neural methods enable to optimize the speech enhancement system with more applicationoriented objectives. For example, we can jointly optimize speech enhancement and automatic speech recognition (ASR) only with ASR error minimization criteria. The major contribution of this paper is to investigate how a system optimized based on the ASR objective improves the speech enhancement quality on various signal level metrics in addition to the ASR word error rate (WER) metric. We use a recently developed multichannel end-to-end (ME2E) system, which integrates neural dereverberation, beamforming, and attention-based speech recognition within a single neural network. Additionally, we propose to extend the dereverberation sub network of ME2E by dynamically varying the filter order in linear prediction by using reinforcement learning, and extend the beamforming subnetwork by incorporating the estimation of a speech distortion factor. The experiments reveal how well different signal level metrics correlate with the WER metric, and verify that learning-based speech enhancement can be realized by end-to-end ASR training objectives without using parallel clean and noisy data.

Keywords

speech enhancement, speech recognition, neural dereverberation, neural beamformer, training objectives

Authors

SUBRAMANIAN, A.; WANG, X.; BASKAR, M.; WATANABE, S.; TANIGUCHI, T.; TRAN, D.; FUJITA, Y.

Released

20. 10. 2019

Publisher

IEEE Signal Processing Society

Location

New Paltz, NY

ISBN

978-1-7281-1123-0

Book

IEEE Workshop on Applications of Signal Processing to Audio and Acoustics

Pages from

234

Pages to

238

Pages count

5

URL

https://ieeexplore.ieee.org/document/8937250

BibTex

@inproceedings{BUT170323,
  author="SUBRAMANIAN, A. and WANG, X. and BASKAR, M. and WATANABE, S. and TANIGUCHI, T. and TRAN, D. and FUJITA, Y.",
  title="Speech Enhancement Using End-to-End Speech Recognition Objectives",
  booktitle="IEEE Workshop on Applications of Signal Processing to Audio and Acoustics",
  year="2019",
  pages="234--238",
  publisher="IEEE Signal Processing Society",
  address="New Paltz, NY",
  doi="10.1109/WASPAA.2019.8937250",
  isbn="978-1-7281-1123-0",
  url="https://ieeexplore.ieee.org/document/8937250"
}