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New voice over Internet protocol technique with hierarchical data security protection

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3 Author(s)
Guo, J.-I. ; Dept. of Comput. Sci. & Inf. Eng., Nat. Chung-Cheng Univ., Chia, Taiwan ; Yen, J.-C. ; Pai, H.-F.

The authors propose a voice over Internet protocol (VoIP) technique with a new hierarchical data security protection (HDSP) scheme. The proposed HDSP scheme can maintain the voice quality degraded from packet loss and preserve high data security. It performs both the data inter-leaving on the inter-frame of voice for achieving better error recovery of voices suffering from continuous packet loss, and the data encryption on the intra-frame of voice for achieving high data security, which are controlled by a random bit-string sequence generated from a chaotic system. To demonstrate the performance of the proposed HDSP scheme, we have successfully verified and analysed the proposed approach through software simulation and statistical measures on several test voices

Published in:

Vision, Image and Signal Processing, IEE Proceedings -  (Volume:149 ,  Issue: 4 )

Date of Publication:

Aug 2002

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