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Banca de DEFESA: CASSIO TRINDADE BATISTA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE: CASSIO TRINDADE BATISTA
DATA: 07/10/2022
HORA: 09:00
LOCAL: meet.google.com/cqm-fggv-cdb
TÍTULO:

Experiments on Forced Phonetic Alignment for Brazilian Portuguese Using Kaldi Tools


PALAVRAS-CHAVES:

Forced alignment. Speech segmentation. Acoustic modeling. Kaldi. Brazilian Portuguese.


PÁGINAS: 60
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Ciência da Computação
SUBÁREA: Sistemas de Computação
RESUMO:

Phonetic analysis of speech, in general, requires the alignment of audio samples to its phonetic transcription. This could be done manually for a couple of files, but as the corpus grows large it becomes infeasibly time-consuming. This paper describes the evolution process towards creating free resources for phonetic alignment in Brazilian Portuguese (BP) using Kaldi, a toolkit that achieves state of the art for open-source speech recognition, within a toolkit we call UFPAlign. The contributions of this work are then twofold: developing resources to perform forced alignment in BP, including the release of scripts to train acoustic models via Kaldi, as well as the resources themselves under open licenses; and bringing forth a comparison to other two phonetic aligners that provide resources for BP, namely EasyAlign and Montreal Forced Aligner (MFA), the latter being also Kaldi-based. Evaluation took place in terms of phone boundary and intersection over union metrics over a dataset of 385 hand-aligned utterances, and results show that Kaldi-based aligners perform better overall, and that UFPAlign models are more accurate than MFA’s. Furthermore, complex deep-learning-based approaches still do not improve performance compared to simpler models.


MEMBROS DA BANCA:
Interno - 1176325 - ALDEBARO BARRETO DA ROCHA KLAUTAU JUNIOR
Interno - 2378314 - JEFFERSON MAGALHAES DE MORAIS
Presidente - 2659210 - NELSON CRUZ SAMPAIO NETO
Externo à Instituição - RANNIERY DA SILVA MAIA
Externo à Instituição - VANESSA MARQUIAFÁVEL SERRANI
Notícia cadastrada em: 22/09/2022 10:51
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