哈尔滨工程大学学报2012，Vol.33Issue(1)：106-111,6.DOI:10.3969/j.issn.1007-7043.201009044
助听器多通道宽动态范围压缩的低功耗硬件实现
Low power hardware implementation of multi-channel wide dynamic range compression for digital hearing aids
摘要
Abstract
The multi-channel wide dynamic range compression ( WDRC ) algorithm, which involves many non-linear operations (logarithm and exponent) and is highly power-consuming, is commonly used in digital hearing aids. Ac-cording to the characteristics of the sound pressure level (SPL) detection in WDRC gain computing, a low power hardware implementation method for multi-channel WDRC based on a lookup table was proposed in this paper. In this method, the input signals mean power was directly mapped to the WDRC gain without non-linear operations. The method only introduced small errors by using proper power interval division, inhibiting the fluctuations of the gains through a recursive smoothing operation on the results of the lookup table, while at the same time easily adjus-ting the attack time and release time. The simulation result shows that the gains obtained by the proposed method are consistent with the computing result with smaller fluctuations. Furthermore, because of no piece-wise linear constraint for the I/O curves, the method has greater configuration flexibility. The VLSI design of a 32 channel WDRC module based on the proposed method was realized in the SMIC 0. 13 μm process. The test result shows that the power dissipation of the design is only 19. 2 μW.关键词
数字助听器/多通道/宽动态范围压缩/低功耗/硬件实现/VLSIKey words
digital hearing aid/ multi-channel/ wide dynamic range compression/ low power/ hardware implementa-tion/ VLSI分类
信息技术与安全科学引用本文复制引用
于增辉,黑勇,薛金勇,于伽,陈黎明,周玉梅..助听器多通道宽动态范围压缩的低功耗硬件实现[J].哈尔滨工程大学学报,2012,33(1):106-111,6.基金项目
国家863计划基金资助项目(2008AA010704). （2008AA010704）
