標題: Design and Implementation of Low-Power ANSI S1.11 Filter Bank for Digital Hearing Aids
作者: Kuo, Yu-Ting
Lin, Tay-Jyi
Li, Yueh-Tai
Liu, Chih-Wei
電子工程學系及電子研究所
Department of Electronics Engineering and Institute of Electronics
關鍵字: Hearing aid;filter bank;low power
公開日期: 1-Jul-2010
摘要: Due to well matching the frequency characteristics of human ears, ANSI S1.11 1/3-octave filter bank is popular in acoustic applications, such as acoustic analyzers and equalizers. It is also desirable in hearing aids because the famous hearing aid prescription formula, NAL-NL1, prescribes its gains at ANSI 1/3-octave frequencies. However, the high computation complexity limits its usage, in which the power consumption is a critical concern. To address this issue, a low-power design and implementation of ANSI S1.11 filter bank for digital hearing aids is present. We first develop the complexity-effective multirate FIR filter bank algorithm. And, a systematic coefficient design flow is elaborated for the proposed filter bank to minimize the order of the FIR filter thereof. In an 18-band digital hearing aid with 24-kHz sampling rate, the proposed algorithm saves about 96% of multiplications and additions, comparing that with a straightforward FIR filter bank. Moreover, various low-power VLSI design techniques are investigated in detail and applied on our design. The proposed complexity-effective ANSI S1.11 FIR filter bank has been implemented in the TSMC 0.13-mu m CMOS technology with an area-efficient architecture. The test chip consumes only 87 mu W, which is 30%-79% of that of the others available in the literature. The proposed low-power ANSI 1/3-octave bank makes itself being able to precisely apply the prescribed gains obtained by NAL-NL1 prescription formula for hearing-impaired people.
URI: http://dx.doi.org/10.1109/TCSI.2009.2033539
http://hdl.handle.net/11536/5167
ISSN: 1549-8328
DOI: 10.1109/TCSI.2009.2033539
期刊: IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS I-REGULAR PAPERS
Volume: 57
Issue: 7
起始頁: 1684
結束頁: 1696
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