Title
Constrained Output Embeddings for End-to-End Code-Switching Speech Recognition with Only Monolingual Data.
Abstract
The lack of code-switch training data is one of the major concerns in the development of end-to-end code-switching automatic speech recognition (ASR) models. In this work, we propose a method to train an improved end-to-end code-switching ASR using only monolingual data. Our method encourages the distributions of output token embeddings of monolingual languages to be similar, and hence, promotes the ASR model to easily code-switch between languages. Specifically, we propose to use Jensen-Shannon divergence and cosine distance based constraints. The former will enforce output embeddings of monolingual languages to possess similar distributions, while the later simply brings the centroids of two distributions to be close to each other. Experimental results demonstrate high effectiveness of the proposed method, yielding up to 4.5% absolute mixed error rate improvement on Mandarin-English code-switching ASR task.
Year
DOI
Venue
2019
10.21437/interspeech.2019-1867
Conference of the International Speech Communication Association
DocType
Volume
Citations 
Journal
abs/1904.03802
0
PageRank 
References 
Authors
0.34
0
7
Name
Order
Citations
PageRank
Yerbolat Khassanov133.79
Haihua Xu25511.41
Van Tung Pham3408.42
Zhiping Zeng413.06
Eng Siong Chng5970106.33
Chongjia Ni6408.63
Bin Ma711528.36