NDLI: Analog complex gammatone filter for cochlear implant channels

Content Provider	IEEE Xplore Digital Library
Author	Ngamkham, W. Sawigun, C. Hiseni, S. Serdijn, W.A.
Copyright Year	2010
Description	Author affiliation: Biomedical Electronics Group, Electronics Research Laboratory, Delft University of Technology, the Netherlands (Ngamkham, W.; Sawigun, C.; Hiseni, S.; Serdijn, W.A.)
Abstract	According to recent physiological experiments, the envelope and phase of speech signals are required to enhance the perceptive capability of a cochlear implant processor. In this paper, the design of an analog complex gammatone filter is introduced in order to extract both envelope and phase information of the incoming speech signals as well as to emulate the basilar membrane spectral selectivity. The gammatone impulse response is first transformed into the frequency domain and the resulting $8^{th}-order$ transfer function is subsequently mapped onto a state-space description of an orthonormal ladder filter. Using this approach, the real and imaginary transfer functions that share the same denominator can be extracted using two different C matrices. This results in a compact filter structure. The proposed filter is designed using Gm-C integrators and sub-threshold CMOS devices in AMIS 0.35μm technology. Simulation results using Cadence RF Spectre confirm the design principle and ultra low power operation.
Starting Page	969
Ending Page	972
File Size	330452
Page Count	4
File Format	PDF
ISBN	9781424453085
DOI	10.1109/ISCAS.2010.5537383
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-05-30
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Cochlear implants Transfer functions Speech enhancement Speech processing Signal processing Signal design Information filtering Information filters Data mining Biomembranes
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
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9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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