Proceedings ArticleDOI
Signal analysis by using FIR filter banks in cochlear implant prostheses
P Mahalakshmi,M R Reddy +1 more
- pp 253-258
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TLDR
In this paper, a 16-channel non-uniformly spaced, high stop band attenuation (≅ −60dB) finite impulse response (FIR) filter bank model for cochlear implant processors is described.Abstract:
The use of auditory models in cochlear implant speech processing strategies aims to improve cochlear implantee's perception of speech. Current speech processing strategies for cochlear implants use an IIR filter bank which decomposes the audio signals into multiple frequency bands each associated with one electrode. This paper describes a 16-channel non-uniformly spaced, high stop band attenuation (≅ −60dB) finite impulse response (FIR) filter bank model for cochlear implants and how speech intelligibility is evaluated as a function of various parameters in cochlear implant processors. The design has the advantages of higher stop band attenuation and linear phase frequency response. The filter bank implemented is successfully tested using speech signals extracted from TIMIT database and their band energies are calculated which are useful in estimating the stimulation pulse level to be generated and presented to the cochlear electrodes.read more
Citations
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Journal ArticleDOI
Folded Architecture for Digital Gammatone Filter Used in Speech Processor of Cochlear Implant
TL;DR: Folded second‐order filter sections are cascaded with three similar structures to realize the eighth‐order digital GTF whose response is a close match to the human cochlea response.
Journal ArticleDOI
Considerations for Fitting Cochlear Implants Bimodally and to the Single-Sided Deaf
Sabrina H. Pieper,Noura Hamze,Stefan Brill,Sabine Hochmuth,Mats Exter,Marek Polak,Andreas Radeloff,Michael Buschermöhle,Mathias Dietz +8 more
TL;DR: In this article , the mismatch is not constant, but rather highly stimulus-dependent, and the mismatch compensation strategies are reported, taking into consideration the specific needs of the respective patient groups, and practical challenges typically faced by audiologists in the proposed fitting procedure are discussed.
Journal ArticleDOI
VLSI Architecture of Digital Auditory Filter for Speech Processor of Cochlear Implant
K. Rajalakshmi,A. Kandaswamy +1 more
TL;DR: Digital VLSI implementation of an auditory filter for speech processor of cochlear implant (CI) is proposed and optimized design for hardware implementation of the filter with respect to area, power and speed is the significant criterion.
Journal ArticleDOI
An efficient digital gammatone filter architecture for Cochlear implant
TL;DR: The implementation of very-large-scale integration (VLSI) architecture for the digital filter of Cochlear implant to achieve low power, high performance and minimum area and ripple carry adder is used here to provide less power consumption.
Proceedings ArticleDOI
Speech signal processing implementation for hearing impairment based on FPGA
TL;DR: This paper takes an approach to design a FPGA based system which can separate the input speech signal into different bands and gain is adjusted for individual band and it is observed that the proposed algorithm implemented onFPGA provides better sound perception to hearing impairment.
References
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Book
Fundamentals of speech recognition
TL;DR: This book presents a meta-modelling framework for speech recognition that automates the very labor-intensive and therefore time-heavy and therefore expensive and expensive process of manually modeling speech.
Book
Digital Signal Processing : A Computer-Based Approach
TL;DR: A number of new topics have been added to the second edition of "Digital Signal Processing: A Computer-Based Approach", based on user feedback, and the author has taken great care to organize the chapters more logically by reordering the sections within chapters.
Journal ArticleDOI
Mimicking the human ear
TL;DR: The purpose of this article is to present an overview of various signal-processing techniques that have been used for cochlear prosthesis over 25 years.
Journal ArticleDOI
Introduction to cochlear implants
TL;DR: The greatest benefits with cochlear implantation have occurred in patients who (1) acquired speech and language before their hearing loss, and (2) have shorter duration of deafness.
Journal ArticleDOI
Signal-processing techniques for cochlear implants
TL;DR: A review of various signal-processing techniques that have been used for cochlear prosthesis over the past 25 years is presented.
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