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Improving speech intelligibility in perceptual wavelet packet-based speech coding for cochlear implants

Improving speech intelligibility in perceptual wavelet packet-based speech coding for cochlear implants
Improving speech intelligibility in perceptual wavelet packet-based speech coding for cochlear implants

Speech intelligibility for noise reduction algorithms which were integrated into perceptual wavelet packet-based speech coding strategy in cochlear implant (CI) processors was investigated in this study. The noise reduction algorithms including time-adaptive wavelet thresholding (TAWT) and time-frequency spectral subtraction (TFSS) were selected for this study due to simple and suitable for real-time implementation. The experiments were compared without and with noise reduction algorithms for fourteen normal-hearing (NH) listeners. The speech sentences were corrupted by babble noise in different levels of signal-to-noise ratio (SNR) (i.e. 0, 5 and 10 dB). The experimental results showed that vocoded noisy speech with TAWT and TFSS provided higher intelligibility at 0 and 5 dB SNR but slightly lower intelligibility at 10 dB SNR when compared to vocoded noisy speech. CI listeners may benefit more than NH listeners in further study.

Cochlear implant, Spectral subtraction, Speech intelligibility, Wavelet packet, Wavelet thresholding
323-328
Institute of Electrical and Electronics Engineers Inc.
Dachasilaruk, Siriporn
b535096b-4ffb-4833-8188-1c8dc7f83d2d
Bleeck, Stefan
c888ccba-e64c-47bf-b8fa-a687e87ec16c
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba
Dachasilaruk, Siriporn
b535096b-4ffb-4833-8188-1c8dc7f83d2d
Bleeck, Stefan
c888ccba-e64c-47bf-b8fa-a687e87ec16c
White, Paul
2dd2477b-5aa9-42e2-9d19-0806d994eaba

Dachasilaruk, Siriporn, Bleeck, Stefan and White, Paul (2015) Improving speech intelligibility in perceptual wavelet packet-based speech coding for cochlear implants. In Proceedings - 2014 7th International Conference on BioMedical Engineering and Informatics, BMEI 2014. Institute of Electrical and Electronics Engineers Inc. pp. 323-328 . (doi:10.1109/BMEI.2014.7002793).

Record type: Conference or Workshop Item (Paper)

Abstract

Speech intelligibility for noise reduction algorithms which were integrated into perceptual wavelet packet-based speech coding strategy in cochlear implant (CI) processors was investigated in this study. The noise reduction algorithms including time-adaptive wavelet thresholding (TAWT) and time-frequency spectral subtraction (TFSS) were selected for this study due to simple and suitable for real-time implementation. The experiments were compared without and with noise reduction algorithms for fourteen normal-hearing (NH) listeners. The speech sentences were corrupted by babble noise in different levels of signal-to-noise ratio (SNR) (i.e. 0, 5 and 10 dB). The experimental results showed that vocoded noisy speech with TAWT and TFSS provided higher intelligibility at 0 and 5 dB SNR but slightly lower intelligibility at 10 dB SNR when compared to vocoded noisy speech. CI listeners may benefit more than NH listeners in further study.

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More information

e-pub ahead of print date: 14 October 2014
Published date: 8 January 2015
Venue - Dates: 2014 7th International Conference on BioMedical Engineering and Informatics, BMEI 2014, China, 2014-10-13 - 2014-10-15
Keywords: Cochlear implant, Spectral subtraction, Speech intelligibility, Wavelet packet, Wavelet thresholding

Identifiers

Local EPrints ID: 436063
URI: http://eprints.soton.ac.uk/id/eprint/436063
PURE UUID: b672ae42-4ce1-4d61-8303-77cafb68707c
ORCID for Stefan Bleeck: ORCID iD orcid.org/0000-0003-4378-3394
ORCID for Paul White: ORCID iD orcid.org/0000-0002-4787-8713

Catalogue record

Date deposited: 27 Nov 2019 17:30
Last modified: 18 Feb 2021 17:06

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Contributors

Author: Siriporn Dachasilaruk
Author: Stefan Bleeck ORCID iD
Author: Paul White ORCID iD

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