RESEARCH
NLP
Transformer-based Acoustic Modeling for Hybrid Speech Recognition
April 30, 2020
Abstract
We propose and evaluate transformer-based acoustic models (AMs) for hybrid speech recognition. Several modeling choices are discussed in this work, including various positional embedding methods and an iterated loss to enable training deep transformers. We also present a preliminary study of using limited right context in transformer models, which makes it possible for streaming applications. We demonstrate that on the widely used Librispeech benchmark, our transformer-based AM outperforms the best published hybrid result by 19% to 26% relative when the standard n-gram language model (LM) is used. Combined with neural network LM for rescoring, our proposed approach achieves state-of-the-art results on Librispeech. Our findings are also confirmed on a much larger internal dataset.
AUTHORS
Written by
Yongqiang Wang
Abdelrahman Mohamed
Alex Xiao
Andros Tjandra
Chunxi Liu
Duc Le
Frank Zhang
Geoffrey Zweig
Hongzhao Huang
Jay Mahadeokar
Mike Seltzer
Publisher
ICASSP
Research Topics
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