基于听觉特性的电子耳蜗语音编码策略

为了改善电子耳蜗语音编码策略的性能，提出了一种基于听觉特性的编码策略.策略中的带通滤波及包络检测阶段采用Gammatone滤波器模型和Meddis内毛细胞模型；在通道选择阶段引入心理声学的掩蔽效应模型，从M个通道中选出N个通道，在相应的通道产生脉冲刺激信号.用MATLAB对提出的策略进行仿真研究，实现了22选8的编码策略.结果表明，所提编码策略在稳定性和鲁棒性方面优于CIS和ACE编码策略.

Auditory Characteristics based Speech Coding Strategy in Cochlear Implant

For the limitations of speech coding strategy in cochlear implants， a coding strategy was proposed based on auditory characteristics. For the band pass filter and envelope detector stage in the proposed strategy， Gammatone filterbanks model and Meddis inner hair cell(IHC)model were used respectively. For channel selection stage， a psychoacoustic masking effects model was used. The strategy using MATLAB was simulated，and 8 of 22 channel coding strategy was realized. The results showed the proposed strategy had more stability and robustness than other strategies， such as CIS (continuous interleaved sampling)and ACE (advanced combination encoder).