Comparative Study of PCM, LPC, and CELP Speech Coders Used for VoIP Applications

Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 308)


The quality of the speech signal in a voice over internet protocol (VoIP) is governed by the speech coding technique employed. Currently, various standard coders such as FS-1015 (LPC-10), ITU-G.711, and FS-1016 (ITU-G.728) are used to digitize the speech signal. This paper analyzes the performance of the above coders by comparing the coding capabilities of the coders on two Hindi and two English language sentences. The performance is then evaluated in terms of compression ratio (CR), peak signal-to-noise ratio (PSNR), and normalized root mean square error (NRMSE).


VoIP LPC-10 G.711 G.728 CR PSNR NRMSE 


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Copyright information

© Springer India 2015

Authors and Affiliations

  1. 1.Department of Electronics and Communication EngineeringBirla Institute of Technology, MesraRanchiIndia

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