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Slovak Broadcast News Speech Recognition and Transcription System

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Advances in Network-Based Information Systems (NBiS 2018)

Part of the book series: Lecture Notes on Data Engineering and Communications Technologies ((LNDECT,volume 22))

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Abstract

We have developed a working prototype of automatic subtitling system for transcription, archiving, and indexing of Slovak audiovisual recordings, such as lectures, talks, discussions or broadcast news. To go further in the development and research, we had to incorporate more and more modern speech technologies and embrace nowadays deep learning techniques. This paper describes transition and changes made to our working prototype regarding speech recognition core replacement, architecture changes and new web-based user interface. We have used the state-of-the art speech toolkit KALDI and distributed architecture to achieve better responsivity of the interface and faster processing of the audiovisual recordings. Using acoustic models based on time delay deep neural networks we have been able to lower the system’s average word error rate from previously reported 24% to 15%, absolutely.

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Acknowledgments

The research in this paper was supported by the Ministry of Education, Science, Research and Sport of the Slovak Republic under the project VEGA 1/0511/17 and the Slovak Research and Development Agency under the project APVV-15-0517.

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Correspondence to Martin Lojka .

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Lojka, M., Viszlay, P., Staš, J., Hládek, D., Juhár, J. (2019). Slovak Broadcast News Speech Recognition and Transcription System. In: Barolli, L., Kryvinska, N., Enokido, T., Takizawa, M. (eds) Advances in Network-Based Information Systems. NBiS 2018. Lecture Notes on Data Engineering and Communications Technologies, vol 22. Springer, Cham. https://doi.org/10.1007/978-3-319-98530-5_32

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