Ondřej Plátek


2018

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Using Adversarial Examples in Natural Language Processing
Petr Bělohlávek | Ondřej Plátek | Zdeněk Žabokrtský | Milan Straka
Proceedings of the Eleventh International Conference on Language Resources and Evaluation (LREC 2018)

2014

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Alex: Bootstrapping a Spoken Dialogue System for a New Domain by Real Users
Ondřej Dušek | Ondřej Plátek | Lukáš Žilka | Filip Jurčíček
Proceedings of the 15th Annual Meeting of the Special Interest Group on Discourse and Dialogue (SIGDIAL)

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Free on-line speech recogniser based on Kaldi ASR toolkit producing word posterior lattices
Ondřej Plátek | Filip Jurčíček
Proceedings of the 15th Annual Meeting of the Special Interest Group on Discourse and Dialogue (SIGDIAL)

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Free English and Czech telephone speech corpus shared under the CC-BY-SA 3.0 license
Matěj Korvas | Ondřej Plátek | Ondřej Dušek | Lukáš Žilka | Filip Jurčíček
Proceedings of the Ninth International Conference on Language Resources and Evaluation (LREC'14)

We present a dataset of telephone conversations in English and Czech, developed for training acoustic models for automatic speech recognition (ASR) in spoken dialogue systems (SDSs). The data comprise 45 hours of speech in English and over 18 hours in Czech. Large part of the data, both audio and transcriptions, was collected using crowdsourcing, the rest are transcriptions by hired transcribers. We release the data together with scripts for data pre-processing and building acoustic models using the HTK and Kaldi ASR toolkits. We publish also the trained models described in this paper. The data are released under the CC-BY-SA~3.0 license, the scripts are licensed under Apache~2.0. In the paper, we report on the methodology of collecting the data, on the size and properties of the data, and on the scripts and their use. We verify the usability of the datasets by training and evaluating acoustic models using the presented data and scripts.