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Using geometric spectral subtraction approach for feature extraction for DSR front-end Arabic system

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Abstract

Noise robustness and Arabic language are still considered as the main challenges for speech recognition over mobile environments. This paper contributed to these trends by proposing a new robust Distributed Speech Recognition (DSR) system for Arabic language. A speech enhancement algorithm was applied to the noisy speech as a robust front-end pre-processing stage to improve the recognition performance. While an isolated Arabic word engine was designed, and developed using HMM Model to perform the recognition process at the back-end. To test the engine, several conditions including clean, noisy and enhanced noisy speech were investigated together with speaker dependent and speaker independent tasks. With the experiments carried out on noisy database, multi-condition training outperforms the clean training mode in all noise types in terms of recognition rate. The results also indicate that using the enhancement method increases the DSR accuracy of our system under severe noisy conditions especially at low SNR down to 10 dB.

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Authors and Affiliations

  1. Research Unit: Sciences and Technologies of Image and Telecommunications, Higher Institute of Biotechnology, University of Sfax, Sfax, Tunisia

    Zied Sakka, Elhem Techini & MedSalim Bouhlel

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  1. Zied Sakka
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  2. Elhem Techini
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  3. MedSalim Bouhlel
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Correspondence to Zied Sakka.

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Sakka, Z., Techini, E. & Bouhlel, M. Using geometric spectral subtraction approach for feature extraction for DSR front-end Arabic system. Int J Speech Technol 20, 645–650 (2017). https://doi.org/10.1007/s10772-017-9433-1

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  • DOI: https://doi.org/10.1007/s10772-017-9433-1

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