| 基于WDRC的听力损伤补偿算法研究 |
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| 引用本文： | 杨博,刘润生,张国防.基于WDRC的听力损伤补偿算法研究[J].电声技术,2013(11):45-49. |
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| 作者姓名： | 杨博 刘润生 张国防 |
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| 作者单位： | [1]北京交通大学电子信息工程学院,北京100044 [2]清华大学电子工程系,北京100084 |
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| 基金项目： | 国家高新技术研究发展计划（863计划）项目（2008AA010700） |
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| 摘 要： | 研究了基于宽动态范围压缩(Wide Dynamic Range Compression,WDRC)的听力损伤补偿算法。该算法简单实用,适合在DSP上实现,是目前大多数数字助听器中最核心的信号处理算法。在频率分析的基础上,根据信号的能量、变化速率等特征计算增益。并通过频响整形及最大输出限制算法完善增益。最后借助DSP实验平台实现算法并进行测试。测试结果表明,在满足失真度要求及频响曲线要求的情况下,该信号处理方法可以将声音信号压缩到理想的动态范围内。
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| 关 键 词： | 听力损伤补偿 宽动态范围压缩 最大输出限制 |
Algorithm Researching of Compensating Hearing Loss Based on WDRC |
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| YANG Bo,LIU Runsheng,ZHANG Guofang.Algorithm Researching of Compensating Hearing Loss Based on WDRC[J].Audio Engineering,2013(11):45-49. |
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| Authors: | YANG Bo LIU Runsheng ZHANG Guofang |
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| Institution: | 1. School of Electronic and Information Engineering, Beijing Jiaotong University, Beijing 100044, China; 2. Department of Electronic Engineering,Tsinghua University, Beijing 100084, China) |
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| Abstract: | A method of algorithm researching of compensating hearing loss based on wide dynamic range compression （WDRC） has been put forward in this paper. This algorithm which is uncomplicated, practical and fitting to DSP is the most significant signal processing algorithm in most of digital hearing aids at present. In this algorithm, based on the spectrum analysis, gains are calculated according to the features of input signal like energy, fluctuating rate and so on. The gains by frequency shaping and restraining the maximum output are adjusted. The algorithm is realized on DSP developing platform and practically tested. The testing result shows that, the algorithm can compress the signal into the ideal dynamic range, with the degree of distortion and frequency response satisfying. |
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| Keywords: | compensating hearing loss wide dynamic range compression maximum output restraining |
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