全部 标题 作者
关键词 摘要

OALib Journal期刊
ISSN: 2333-9721
费用:99美元

查看量下载量

相关文章

更多...

改进的子波过零电子耳蜗语音编码策略

Keywords: 电子耳蜗,倍频程子波变换,刺激脉冲序列,过零点

Full-Text   Cite this paper   Add to My Lib

Abstract:

提出改进的倍频程小波过零刺激方案(WZCS),以改善电子耳蜗语音编码策略的性能.在语音信号倍频程小波变换域的过零点通过幅度调制合成刺激脉冲,并基于Matlab对该算法和连续间隔采样(CIS)、通道专用采样序列(CSSS)、频率幅度联合调制编码(FAME)等编码策略进行仿真,将合成信号与原始语音、合成信号频谱与原始语音频谱进行了相关性分析.仿真结果表明,WZCS算法合成信号的频谱与原始语音信号的频谱相关系数最大,WZCS算法合成信号频谱与原始语音最为相关,且相关显著,即与其他算法相比其保留了原始语音信号的更多频率和相位成分.

References

[1]  Rabiner L. Computer science: the power of speech[J]. Science, 2003,301:1494-1495.
[2]  Somek B, Fajt S, Dembitz A, et al. Coding strategies for cochlear implants[J]. Automatika, 2006,47(1/2):69-74.
[3]  关添,叶大田.电子耳蜗语音处理主流算法的效果比较和最新进展[J].生物医学工程学杂志,2006,23(5):1138-1141.Guan Tian, Ye Datian. Comparison of the clinic results of speech processing strategies and latest advances on cochlear implant[J]. J Biomed Eng, 2006,23(5):1138-1141.(in Chinese)
[4]  Wilson B S, Finley C C, Lawson D T, et al. Better speech recognition with cochlear implants[J]. Nature, 1991,352:236-238.
[5]  Nogueira W, Buchner A, Lenarz T, et al. A psychoacoustic “N of M” type speech coding strategy for cochlear implants[J]. Eurasip Journal on Applied Signal Processing, 2005,18:3044-3059.
[6]  Rouiha K, Bachir D, Ali B. Analysis of speech processing strategies in cochlear implants[J]. Journal of Computer Science, 2008,4(5):372-374.
[7]  Rubinstein J T. How cochlear implants encode speech[J]. Current Opinion in Otolaryngology, 2004,12:444-448.
[8]  王卫东,袁虎.一种新的电子耳蜗的刺激脉冲序列的合成方案[J].中国生物医学工程学报,2005,24(3):375-380.Wang Weidong, Yuan Hu. New strategy of stimulus synthesis in cochlear implant[J]. Chinese Journal of Biomedical Engineering, 2005,24(3):375-380. (in Chinese)
[9]  Zeng F G, Nie K B, Stickney G S, et al. Speech recognition with amplitude and frequency modulations[J]. The National Academy of Sciences of the USA, 2005,102:2293-2298.
[10]  Sit J J, Simonson A M, Andrew J, et al. A low-power asynchronous interleaved sampling algorithm for cochlear implants that encodes envelope and phase information[J]. IEEE TBME, 2007,54:138-149.
[11]  Nie K B, Stickney G S, Zeng F G. Encoding frequency modulation to improve cochlear implant performance in noise[J]. IEEE Trans on Biomed Eng, 2005,52:64-73.
[12]   Logan B F. Information in the zero-crossings of band pass signals[J]. Bell Syst Tech J, 1977,56:487-510.

Full-Text

Contact Us

service@oalib.com

QQ:3279437679

WhatsApp +8615387084133