Michael Rießler


2020

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Improving the Language Model for Low-Resource ASR with Online Text Corpora
Nils Hjortnaes | Timofey Arkhangelskiy | Niko Partanen | Michael Rießler | Francis Tyers
Proceedings of the 1st Joint Workshop on Spoken Language Technologies for Under-resourced languages (SLTU) and Collaboration and Computing for Under-Resourced Languages (CCURL)

In this paper, we expand on previous work on automatic speech recognition in a low-resource scenario typical of data collected by field linguists. We train DeepSpeech models on 35 hours of dialectal Komi speech recordings and correct the output using language models constructed from various sources. Previous experiments showed that transfer learning using DeepSpeech can improve the accuracy of a speech recognizer for Komi, though the error rate remained very high. In this paper we present further experiments with language models created using KenLM from text materials available online. These are constructed from two corpora, one containing literary texts, one for social media content, and another combining the two. We then trained the model using each language model to explore the impact of the language model data source on the speech recognition model. Our results show significant improvements of over 25% in character error rate and nearly 20% in word error rate. This offers important methodological insight into how ASR results can be improved under low-resource conditions: transfer learning can be used to compensate the lack of training data in the target language, and online texts are a very useful resource when developing language models in this context.

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Proceedings of the Sixth International Workshop on Computational Linguistics of Uralic Languages
Tommi A Pirinen | Francis M. Tyers | Michael Rießler
Proceedings of the Sixth International Workshop on Computational Linguistics of Uralic Languages

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A pseudonymisation method for language documentation corpora: An experiment with spoken Komi
Rogier Blokland | Niko Partanen | Michael Rießler
Proceedings of the Sixth International Workshop on Computational Linguistics of Uralic Languages

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Towards a Speech Recognizer for Komi, an Endangered and Low-Resource Uralic Language
Nils Hjortnaes | Niko Partanen | Michael Rießler | Francis M. Tyers
Proceedings of the Sixth International Workshop on Computational Linguistics of Uralic Languages

2019

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An OCR system for the Unified Northern Alphabet
Niko Partanen | Michael Rießler
Proceedings of the Fifth International Workshop on Computational Linguistics for Uralic Languages

2018

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Proceedings of the Fourth International Workshop on Computational Linguistics of Uralic Languages
Tommi A. Pirinen | Michael Rießler | Jack Rueter | Trond Trosterud | Francis M. Tyers
Proceedings of the Fourth International Workshop on Computational Linguistics of Uralic Languages

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Dependency Parsing of Code-Switching Data with Cross-Lingual Feature Representations
Niko Partanen | Kyungtae Lim | Michael Rießler | Thierry Poibeau
Proceedings of the Fourth International Workshop on Computational Linguistics of Uralic Languages

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The First Komi-Zyrian Universal Dependencies Treebanks
Niko Partanen | Rogier Blokland | KyungTae Lim | Thierry Poibeau | Michael Rießler
Proceedings of the Second Workshop on Universal Dependencies (UDW 2018)

Two Komi-Zyrian treebanks were included in the Universal Dependencies 2.2 release. This article contextualizes the treebanks, discusses the process through which they were created, and outlines the future plans and timeline for the next improvements. Special attention is paid to the possibilities of using UD in the documentation and description of endangered languages.

2017

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Instant annotations in ELAN corpora of spoken and written Komi, an endangered language of the Barents Sea region
Ciprian Gerstenberger | Niko Partanen | Michael Rießler
Proceedings of the 2nd Workshop on the Use of Computational Methods in the Study of Endangered Languages

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Proceedings of the Third Workshop on Computational Linguistics for Uralic Languages
Francis M. Tyers | Michael Rießler | Tommi A. Pirinen | Trond Trosterud
Proceedings of the Third Workshop on Computational Linguistics for Uralic Languages

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Instant Annotations – Applying NLP Methods to the Annotation of Spoken Language Documentation Corpora
Ciprian Gerstenberger | Niko Partanen | Michael Rießler | Joshua Wilbur
Proceedings of the Third Workshop on Computational Linguistics for Uralic Languages