Zerocrossing-based nonuniform sampling to deliver low-frequency fine structure cue for cochlear implant

	Zerocrossing-based nonuniform sampling to deliver low-frequency fine structure cue for cochlear implant
	Chen Fei; Zhang Yuan-Ting
刊名	DIGITAL SIGNAL PROCESSING
	2011
卷号	21 期号:3 页码:427-432
英文摘要	This paper introduces a zerocrossing-based nonuniform sampling algorithm to deliver the low-frequency (LF) fine structure (FS) cue for a cochlear implant (CI). At LF channels, the zerocrossing times of the bandpassed speech signal are used to represent the FS cue and evoke the pulses. At high frequency channels, the interleaved pulses are generated when no zerocrossing appears at LF channels. The fact that only one pulse is elicited at any moment diminishes the interaction of pulses from adjacent channels. Three experiments were conducted to assess the performance of the proposed algorithm, acoustic simulation of Mandarin phrase identification, intelligibility measure of the synthesized speech, and estimating the envelope waveform at LF channel. Compared with traditional continuous-interleaved-sampling algorithm, the proposed algorithm improves the correct rate on identifying Mandarin phrase contaminated by speech-shaped noise at low signal-to-noise ratio (SNR). At high SNR conditions, the synthesized speech by the proposed algorithm leads to an improved speech intelligibility measure. The envelope waveform at LF channel is faithfully estimated when a low lowpass filtering cutoff frequency was applied to extract the envelope waveform.
收录类别	SCI
原文出处	http://www.sciencedirect.com/science/article/pii/S1051200410002150
语种	英语
内容类型	期刊论文
源URL	[http://ir.siat.ac.cn:8080/handle/172644/3442]
专题	深圳先进技术研究院_医工所
作者单位	DIGITAL SIGNAL PROCESSING
推荐引用方式 GB/T 7714	Chen Fei,Zhang Yuan-Ting. Zerocrossing-based nonuniform sampling to deliver low-frequency fine structure cue for cochlear implant[J]. DIGITAL SIGNAL PROCESSING,2011,21(3):427-432.
APA	Chen Fei,&Zhang Yuan-Ting.(2011).Zerocrossing-based nonuniform sampling to deliver low-frequency fine structure cue for cochlear implant.DIGITAL SIGNAL PROCESSING,21(3),427-432.
MLA	Chen Fei,et al."Zerocrossing-based nonuniform sampling to deliver low-frequency fine structure cue for cochlear implant".DIGITAL SIGNAL PROCESSING 21.3(2011):427-432.