南方医科大学学报 ›› 2012, Vol. 32 ›› Issue (10): 1435-.

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人工耳蜗的膜电位积分放电刺激方案及其数字信号处理

杨一威,徐月晋,缪吉昌,周凌宏,肖中举   

  • 出版日期:2012-10-20 发布日期:2012-10-20

Digital signal processing of a novel neuron discharge model stimulation strategy for cochlear implants

  • Online:2012-10-20 Published:2012-10-20

摘要: 目的结合听觉生理刺激产生的机制,把经典的神经元漏积分放电模型运用于人工耳蜗信息处理编码,以期获得更好的听
觉效果。方法用数字信号处理器(DSP)进行算法仿真,并把结果输入到Matlab中进行分析对比。结果在与CIS编码算法对比
中,膜电位积分放电(MPIF)编码算法发放脉冲更自然,而且是伪随机的,更符合生理的结构特点。结论MPIF方案能够有效的
解决听觉信息发放序列的动态结构在听觉中枢的作用问题,使得刺激脉冲和时间编码有机的结合起来,有效的保证刺激脉冲时
间的相干性和相关性。

Abstract: Abstract: ObjectiveTo apply the classic leakage integrate-and-fire models, based on the mechanism of the generation of
physiological auditory stimulation, in the information processing coding of cochlear implants to improve the auditory result.
MethodsThe results of algorithm simulation in digital signal processor (DSP) were imported into Matlab for a comparative
analysis.ResultsCompared with CIS coding, the algorithm of membrane potential integrate-and-fire (MPIF) allowed more
natural pulse discharge in a pseudo-random manner to better fit the physiological structures.ConclusionThe MPIF algorithm
can effectively solve the problem of the dynamic structure of the delivered auditory information sequence issued in the
auditory center and allowed integration of the stimulating pulses and time coding to ensure the coherence and relevance of the
stimulating pulse time.