基于聽覺特性的電子耳蝸語音編碼策略
發(fā)布時間:2018-09-12 14:20
【摘要】:為了改善電子耳蝸語音編碼策略的性能,提出了一種基于聽覺特性的編碼策略.策略中的帶通濾波及包絡(luò)檢測階段采用Gammatone濾波器模型和Meddis內(nèi)毛細胞模型;在通道選擇階段引入心理聲學(xué)的掩蔽效應(yīng)模型,從M個通道中選出N個通道,在相應(yīng)的通道產(chǎn)生脈沖刺激信號.用MATLAB對提出的策略進行仿真研究,實現(xiàn)了22選8的編碼策略.結(jié)果表明,所提編碼策略在穩(wěn)定性和魯棒性方面優(yōu)于CIS和ACE編碼策略.
[Abstract]:In order to improve the performance of cochlear speech coding strategy, a coding strategy based on auditory characteristics is proposed. Gammatone filter model and Meddis inner hair cell model are used in the band-pass filtering and envelope detection phase of the strategy. Psychoacoustic masking effect model is introduced in the channel selection phase to select N channels from M channels. Pulse stimulus signals are generated in the corresponding channel. The proposed strategy is simulated by MATLAB, and the coding strategy of 22 choices 8 is realized. The results show that the proposed coding strategy is superior to CIS and ACE in terms of stability and robustness.
【作者單位】: 東北大學(xué)信息科學(xué)與工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(60970157) 中央高;究蒲袠I(yè)務(wù)費青年教師科研啟動基金資助項目(N100304008)
【分類號】:TN912.3
本文編號:2239292
[Abstract]:In order to improve the performance of cochlear speech coding strategy, a coding strategy based on auditory characteristics is proposed. Gammatone filter model and Meddis inner hair cell model are used in the band-pass filtering and envelope detection phase of the strategy. Psychoacoustic masking effect model is introduced in the channel selection phase to select N channels from M channels. Pulse stimulus signals are generated in the corresponding channel. The proposed strategy is simulated by MATLAB, and the coding strategy of 22 choices 8 is realized. The results show that the proposed coding strategy is superior to CIS and ACE in terms of stability and robustness.
【作者單位】: 東北大學(xué)信息科學(xué)與工程學(xué)院;
【基金】:國家自然科學(xué)基金資助項目(60970157) 中央高;究蒲袠I(yè)務(wù)費青年教師科研啟動基金資助項目(N100304008)
【分類號】:TN912.3
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