Complexity-effective auditory compensation with a controllable filter for digital hearing aids

Auditory compensation consumes significant power due to the computation-intensive operations in the filter bank. To reduce the complexity, a controllable filter was designed to replace the filter bank. Filter order was designed to match prescriptions within a specific error constraint with minimum c...

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Bibliographic Details
Published in17th Asia and South Pacific Design Automation Conference pp. 557 - 558
Main Authors Ya-Ting Chang, Kuo-Chiang Chang, Yu-Ting Kuo, Chih-Wei Liu
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.01.2012
Subjects
Auditory system
Delay
Filter banks
Finite impulse response filter
Gain
Hearing aids
Interpolation
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Summary:Auditory compensation consumes significant power due to the computation-intensive operations in the filter bank. To reduce the complexity, a controllable filter was designed to replace the filter bank. Filter order was designed to match prescriptions within a specific error constraint with minimum computational cost. An interpolation scheme according to the variation of signal intensity was implemented to reduce the overhead of coefficients calculations. The proposed auditory compensation reduces 80% of multiplications and 30% of power consumption compared to the complexity-effective multi-rate filter bank architecture [4]. Moreover, the group delay was also reduced from 10 ms to 2.4 ms.
ISBN:9781467307703
146730770X
ISSN:2153-6961
2153-697X
DOI:10.1109/ASPDAC.2012.6165016