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A Study on APC-MPC in 8kbps of Convergence System

융복합 시스템의 8kbps에 있어서 APC-MPC에 관한 연구

Lee, See-Woo
이시우

  • Received : 2015.04.21
  • Accepted : 2015.07.20
  • Published : 2015.07.28

Abstract

In a MPC(Multi-Pulse Coding) using excitation source of voiced and unvoiced, it would be a distortion of voice waveform. This is caused by normalization of synthesis speech waveform of voiced in the process of restoration. To solve this problem, this paper present APC-MPC of amplitude-position compensation in a multi-pulses each pitch interval in order to reduce distortion of synthesis waveform. Also, I was implemented that the APC-MPC in coding system. And I evaluate the SNRseg of APC-MPC in 8kbps coding condition of convergence system. As a result, SNRseg of APC-MPC was 13.9dB for female voice and 14.3dB for male voice respectively. And so, I expect to be able to this method for cellular phone and smart phone using excitation source of low bit rate.

Keywords

Convergence;Cellular Phone;Smart Phone;Internet Phone;Coding System

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