Uma Comparação entre Máscaras Tempo-frequência para Redução de Ruído em Implantes Cocleares

Rafael Attili Chiea, Marcio H Costa, Guillaume Barrault

DOI: 10.14209/sbrt.2019.1570558867

Evento: XXXVII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais (SBrT2019)

Keywords:

Abstract

Time-frequency filtering techniques have been used for noise reduction in cochlear implants with relative success. The Binary Mask and the Wiener Filter are among the most applied strategies, however they have limited conformation capability. In order to overcome this issue, alternatives have been proposed, such as the parametric Wiener Filter and variations. This work presents a performance comparison between four time-frequency masks in terms of speech intelligibility and quality. Numerical simulations were performed and objective measures correlated to the psychoacoustic perception of cochlear-implant users' were analyzed. Results indicate that parametric masks are more appropriate to this specific application, even though there are not well defined methods to determine parameters' values.

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