Subjective Quality Evaluation of Speech Signals Transmitted via BPL-PLC Wired System

Przemyslaw Falkowski-Gilski, Grzegorz Debita, Marcin Habrych, Bogdan Miedzinski, Przemyslaw Jedlikowski, Bartosz Polnik, Jan Wandzio, Xin Wang

The broadband over power line – power line communication (BPL-PLC) cable is resistant to electricity stoppage and partial damage of phase conductors. It maintains continuity of transmission in case of an emergency. These features make it an ideal solution for delivering data, e.g. in an underground mine environment, especially clear and easily understandable voice messages. This paper describes a subjective quality evaluation of such a system. The solution was designed and tested in real-time operating conditions. It consists of a one-way transmission system, dedicated to delivering speech signals and voice commands. The study involved signal samples in three languages: English, German, and Polish, processed at different bitrates: 8, 16, and 24 kbps. Obtained results confirmed the usefulness of BPL-PLC technology for speech transmission purposes. Even in a narrowband scenario, with bitrates smaller than 1 Mbps, it proved to be a potentially life-saving communication system. Results of this study may aid researchers and parties from the mining and oil industry, as well as professionals involved in rescue operations.

 DOI: 10.21437/Interspeech.2020-1077

Cite as: Falkowski-Gilski, P., Debita, G., Habrych, M., Miedzinski, B., Jedlikowski, P., Polnik, B., Wandzio, J., Wang, X. (2020) Subjective Quality Evaluation of Speech Signals Transmitted via BPL-PLC Wired System. Proc. Interspeech 2020, 4601-4605, DOI: 10.21437/Interspeech.2020-1077.

  author={Przemyslaw Falkowski-Gilski and Grzegorz Debita and Marcin Habrych and Bogdan Miedzinski and Przemyslaw Jedlikowski and Bartosz Polnik and Jan Wandzio and Xin Wang},
  title={{Subjective Quality Evaluation of Speech Signals Transmitted via BPL-PLC Wired System}},
  booktitle={Proc. Interspeech 2020},