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A Systematic ANSI S1.11 Filter Bank Specification Relaxation and Its Efficient Multirate Architecture for Hearing-Aid Systems

机译:用于助听器的系统性ANSI S1.11滤波器组规范松弛及其高效的多速率体系结构

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摘要

Recently, emerging mobile computing requires the high integration of hearing aids into a single system-on-chip. Modern hearing aid systems include a frequency decomposer, noise reduction, feedback cancellation, auditory compensation, and intelligent adaptation. The majority of existing works concentrated on improving the performance and efficiency on a single-signal processing block or one-sided effect. These works lacked comprehensive discussions on system-wide aspects regarding the overall impacts. To design an optimal hearing aid system, frequency decomposers, or the filter banks that dominate in hearing aid systems, are the first priority. We propose a systematic relaxation of the ANSI S1.11 specification and its design procedure for filter banks. The proposed design procedure overcomes the drawbacks of previous works and changes the five performance indices of the filter bank: delay, complexity, sub-band rate reduction, ripples of synthesized output, and prescription matching errors. These performance indices help system or algorithm designers in selecting a beneficial system-relaxed filter bank to achieve optimal hearing aids. The proposed multirate filter bank using the resampling method provides an efficient, low complexity, and delay-constrained computing architecture. Finally, seven design cases are used to demonstrate the proposed method, and comprehensive discussions of the five performance indices are presented.
机译:最近,新兴的移动计算要求将助听器高度集成到单个片上系统中。现代助听器系统包括频率分解器,降噪,反馈消除,听觉补偿和智能适应。现有的大多数工作都集中在提高单信号处理模块或单方面效应的性能和效率上。这些作品缺少关于系统整体方面的整体影响的全面讨论。为了设计最佳的助听器系统,优先考虑频率分解器或助听器系统中占主导地位的滤波器组。我们建议对ANSI S1.11规范及其滤波器程序的设计程序进行系统的放松。提出的设计程序克服了先前工作的缺点,并更改了滤波器组的五个性能指标:延迟,复杂性,子带速率降低,合成输出的纹波和处方匹配误差。这些性能指标可帮助系统或算法设计人员选择有益的系统松弛滤波器组,以实现最佳助听器。所提出的使用重采样方法的多速率滤波器组提供了高效,低复杂度和受延迟约束的计算架构。最后,使用七个设计案例来说明该方法,并对五个性能指标进行了全面讨论。

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