# 멀티펄스의 위치보정 방법을 이용한 8kbps PC-MPC에 관한 연구

• Lee, See-Woo (Dept. of Information and Telecommunication Engineering, Sangmyung University)
• 이시우 (상명대학교 정보통신공학과)
• Accepted : 2013.05.20
• Published : 2013.05.31
• 57 9

#### Abstract

In a MPC coding using excitation source of voiced and unvoiced, it would be a distortion of speech waveform. This is caused by normalization of synthesis speech waveform of voiced in the process of restoration the multi-pulses of representation section. To solve this problem, this paper present a method of position compensation(PC-MPC) in a multi-pulses each pitch interval in order to reduce distortion of speech waveform. I was confirmed that the method can be synthesized close to the original speech waveform. And I evaluate the MPC and PC-MPC using multi-pulses position compensation method. As a result, $SNR_{seg}$ of PC-MPC was improved 0.4dB for female voice and 0.5dB for male voice respectively. Compared to the MPC, $SNR_{seg}$ of PC-MPC has been improved that I was able to control the distortion of the speech waveform finally. And so, I expect to be able to this method for cellular phone and smart phone using excitation source of low bit rate.

#### Keywords

Cellular Phone;Smart Phone;Internet Phone;Speech Coding;Coding System

#### Acknowledgement

Supported by : 상명대학교