A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments

Speech intelligibility in public places can be degraded by the environmental noise and reverberation. In this study, a new near-end listening enhancement (NELE) approach is proposed in which using a time varying filter jointly enhances the onsets and reduces the overlap masking. For optimization, so...

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Autores principales:	Ali Fallah, Steven van de Par
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	speech enhancement NELE reverberation speech intelligibility optimization Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/ec31e9627a274e7796549d532c088217
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spelling	oai:doaj.org-article:ec31e9627a274e7796549d532c0882172021-11-25T16:38:07ZA Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments10.3390/app1122107882076-3417https://doaj.org/article/ec31e9627a274e7796549d532c0882172021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3417/11/22/10788https://doaj.org/toc/2076-3417Speech intelligibility in public places can be degraded by the environmental noise and reverberation. In this study, a new near-end listening enhancement (NELE) approach is proposed in which using a time varying filter jointly enhances the onsets and reduces the overlap masking. For optimization, some look-ahead in clean speech and prior knowledge of room impulse response (RIR) are required. In this method, by optimizing a defined cost function, the Spectro-Temporal Envelope of reverb speech is optimized to be as close as possible to that of clean speech. In this cost function, onsets of speech are optimized with increased weight. This approach is different from overlap-masking ratio (OMR) and speech enhancement (OE) approaches (Grosse, van de Par, 2017, J. Audio Eng. Soc., Vol. 65 (1/2), pp. 31–41) that only consider previous frames in each time slot for determining the time variant filtering. The SRT measurements show that the new optimization framework enhances the speech intelligibility up to 2 dB more that OE.Ali FallahSteven van de ParMDPI AGarticlespeech enhancementNELEreverberationspeech intelligibilityoptimizationTechnologyTEngineering (General). Civil engineering (General)TA1-2040Biology (General)QH301-705.5PhysicsQC1-999ChemistryQD1-999ENApplied Sciences, Vol 11, Iss 10788, p 10788 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	speech enhancement NELE reverberation speech intelligibility optimization Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
spellingShingle	speech enhancement NELE reverberation speech intelligibility optimization Technology T Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999 Ali Fallah Steven van de Par A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments
description	Speech intelligibility in public places can be degraded by the environmental noise and reverberation. In this study, a new near-end listening enhancement (NELE) approach is proposed in which using a time varying filter jointly enhances the onsets and reduces the overlap masking. For optimization, some look-ahead in clean speech and prior knowledge of room impulse response (RIR) are required. In this method, by optimizing a defined cost function, the Spectro-Temporal Envelope of reverb speech is optimized to be as close as possible to that of clean speech. In this cost function, onsets of speech are optimized with increased weight. This approach is different from overlap-masking ratio (OMR) and speech enhancement (OE) approaches (Grosse, van de Par, 2017, J. Audio Eng. Soc., Vol. 65 (1/2), pp. 31–41) that only consider previous frames in each time slot for determining the time variant filtering. The SRT measurements show that the new optimization framework enhances the speech intelligibility up to 2 dB more that OE.
format	article
author	Ali Fallah Steven van de Par
author_facet	Ali Fallah Steven van de Par
author_sort	Ali Fallah
title	A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments
title_short	A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments
title_full	A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments
title_fullStr	A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments
title_full_unstemmed	A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments
title_sort	speech preprocessing method based on perceptually optimized envelope processing to increase intelligibility in reverberant environments
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/ec31e9627a274e7796549d532c088217
work_keys_str_mv	AT alifallah aspeechpreprocessingmethodbasedonperceptuallyoptimizedenvelopeprocessingtoincreaseintelligibilityinreverberantenvironments AT stevenvandepar aspeechpreprocessingmethodbasedonperceptuallyoptimizedenvelopeprocessingtoincreaseintelligibilityinreverberantenvironments AT alifallah speechpreprocessingmethodbasedonperceptuallyoptimizedenvelopeprocessingtoincreaseintelligibilityinreverberantenvironments AT stevenvandepar speechpreprocessingmethodbasedonperceptuallyoptimizedenvelopeprocessingtoincreaseintelligibilityinreverberantenvironments
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A Speech Preprocessing Method Based on Perceptually Optimized Envelope Processing to Increase Intelligibility in Reverberant Environments

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