Title
Non-Parallel Voice Conversion for ASR Augmentation
Abstract
Automatic speech recognition (ASR) needs to be robust to speaker differences. Voice Conversion (VC) modifies speaker characteristics of input speech. This is an attractive feature for ASR data augmentation. In this paper, we demonstrate that voice conversion can be used as a data augmentation technique to improve ASR performance, even on LibriSpeech, which contains 2,456 speakers. For ASR augmentation, it is necessary that the VC model be robust to a wide range of input speech. This motivates the use of a non-autoregressive, non-parallel VC model, and the use of a pretrained ASR encoder within the VC model. This work suggests that despite including many speakers, speaker diversity may remain a limitation to ASR quality. Finally, interrogation of our VC performance has provided useful metrics for objective evaluation of VC quality.
Year
DOI
Venue
2022
10.21437/INTERSPEECH.2022-10990
Conference of the International Speech Communication Association (INTERSPEECH)
DocType
Citations 
PageRank 
Conference
0
0.34
References 
Authors
0
7
Name
Order
Citations
PageRank
Gary Wang110.69
Andrew Rosenberg2192.88
Bhuvana Ramabhadran31779153.83
Fadi Biadsy401.35
Yinghui Huang512.38
Jesse Emond611.03
Pedro Moreno Mengibar700.34