Packet based echo cancellation for voice over Internet protocol


Periakarruppan,, G and Rashid, HAB (2005) Packet based echo cancellation for voice over Internet protocol. 2005 13th IEEE International Conference on Networks Jointly held with the 2005 7th IEEE Malaysia International Conference on Communications, Proceedings 1 and 2. pp. 390-393.

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In today's modern telephony network, VoIP is fast emerging as one of the main communication techniques. However, the performance and the quality of VoIP is affected by echo. In this paper, a Packet Based Echo Canceller (PBEC) is introduced, as a solution to cancel echo in the VoIP network. PBEC can replace the current echo cancellers, which are located in the Public Switched Telephony Network (PSTN) central switches. The operating principle of the PBEC is explained and its advantages highlighted. The performance of the PBEC operating using different speech codec's is also studied. Using the PBEC, a maximum ERLE of 37.39dB has been achieved when used with the Pulse Code Modulation (PCM) based speech codec. From the simulation results, it can be also shown that the performance of the Adaptive Differential Pulse Code Modulation (ADPCM) clearly matches the performance of the PCM based speech codec.

Item Type: Article
Subjects: T Technology > TA Engineering (General). Civil engineering (General)
Divisions: Faculty of Engineering (FOE)
Depositing User: Ms Rosnani Abd Wahab
Date Deposited: 22 Aug 2011 03:10
Last Modified: 22 Aug 2011 03:10


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