Paper Info
Title
Exploring the use of Common Label Set to Improve Speech Recognition of Low Resource Indian Languages
Abstract
In many Indian languages, written characters are organized on sound phonetic principles, and the ordering of characters is the same across many of them. However, while training conventional end-to-end (E2E) Multilingual speech recognition systems, we treat characters or target subword units from different languages as separate entities. Since the visual rendering of these characters is different, in this paper, we explore the benefits of representing such similar target subword units (e.g., Byte Pair Encoded(BPE) units) through a Common Label Set (CLS). The CLS can be very easily created using automatic methods since the ordering of characters is the same in many Indian Languages. E2E models are trained using a transformer-based encoder-decoder architecture. During testing, given the Mel-filterbank features as input, the system outputs a sequence of BPE units in CLS representation. Depending on the language, we then map the recognized CLS units back to the language-specific grapheme representation. Results show that models trained using CLS improve over monolingual baseline and a multilingual framework with separate symbols for each language. Similar experiments on a subset of the Voxforge dataset also confirm the benefits of CLS. An extension of this idea is to decode an unseen language (Zero-resource) using CLS trained model.
Year
DOI
Venue
2021
10.1109/ICASSP39728.2021.9414961
2021 IEEE INTERNATIONAL CONFERENCE ON ACOUSTICS, SPEECH AND SIGNAL PROCESSING (ICASSP 2021)
Keywords
DocType
Citations 
Transformer, Multilingual Speech Recognition, Common Label Set, Low Resource, Zero Resource
Conference
0
PageRank 
References 
Authors
0.34
0
2
Name
Order
Citations
PageRank
Vishwas M. Shetty100.34
Srinivasan Umesh29316.31