標題: 10-ms 18-Band Quasi-ANSI S1.11 1/3-Octave Filter Bank for Digital Hearing Aids
作者: Liu, Chih-Wei
Chang, Kuo-Chiang
Chuang, Ming-Hsun
Lin, Ching-Hao
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Filter bank;hearing aid;low group delay
公開日期: 1-三月-2013
摘要: The ANSI S1.11 1/3-octave filter bank is suitable for digital hearing aids, but its large group delay and high computational complexity complicate matters considerably. This study presents a 10-ms 18-band quasi-ANSI S1.11 1/3-octave filter bank for processing 24 kHz audio signals. We first discuss a filter order optimization algorithm to define the quasi-ANSI filters. The group delay constraint of filters is limited to 10 ms. The proposed design adopts an efficient prescription-fitting algorithm to reduce inter-band interference, enabling the proposed quasi-ANSI filter bank to compensate any type of hearing loss (HL) using the NAL-NL1 or HSE prescription formulas. Simulation results reveal that the maximum matching error in the prescriptions of the mild HL, moderate HL, and severe-to-profound HL is less than 1.5 dB. This study also investigates the complexity-effective multirate IFIR quasi-ANSI filter bank. For an 18-band digital hearing aid with a 24 kHz sampling rate, the proposed architecture eliminates approximately 93% of the multiplications and up to 74% of the storage elements, compared with a parallel FIR filters architecture. The proposed analysis filter bank (AFB) was designed in UMC 90 nm CMOS high-VT technology, and on the basis of post-layout simulations, it consumes 73 mu W (@V-DD = 1 V). By voltage scaling (to 0.6 V), the simulation results show that the power consumption decreases to 27 mu W, which is approximately 30% of that consumed by the most energy-efficient AFB available in the literature for use in hearing aids.
URI: http://dx.doi.org/10.1109/TCSI.2012.2209731
http://hdl.handle.net/11536/21415
ISSN: 1549-8328
DOI: 10.1109/TCSI.2012.2209731
期刊: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume: 60
Issue: 3
起始頁: 638
結束頁: 649
顯示於類別:期刊論文


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  1. 000315959100012.pdf