A Time-Frequency Aware Cochlear Implant: Algorithm and System

  • Songping Mai
  • Yixin Zhao
  • Chun Zhang
  • Zhihua Wang
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7368)


A time-frequency aware (TFA) cochlear implant system and its speech processing strategy (TFA-CIS) are presented in this paper. The system is built upon an implanted low-power digital signal processor (THUCIDSP). And the TFA-CIS strategy takes advantages of the time-frequency aware wavelet packet (WP) filter bank (FB) and WP envelope detector. The joint use of the DSP hardware and the TFA strategy gives birth to a very low power cochlear implant system. Implementation result shows that the complexity of the new TFA-CIS algorithm is 1.82 million instructions per second (MIPS) with db1 wavelet base, and the power dissipation of the DSP is 2.11mW @1.8V, 3MHz.


Cochlear Implant CIS Wavelet Packet DSP 


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Copyright information

© Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  • Songping Mai
    • 1
  • Yixin Zhao
    • 1
  • Chun Zhang
    • 1
  • Zhihua Wang
    • 1
  1. 1.Lab. of Integrated Circuits and Systems Design, Graduate School at ShenzhenTsinghua UniversityShenzhenChina

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