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A Study on 8kbps IP-MPC Method Considering Cellular Phone

  • Journal of Knowledge Information Technology and Systems
  • Abbr : JKITS
  • 2010, 5(5), pp.149-154
  • Publisher : Korea Knowledge Information Technology Society
  • Research Area : Interdisciplinary Studies > Interdisciplinary Research
  • Published : October 31, 2010

Lee See Woo 1

1상명대학교

Candidate

ABSTRACT

In this paper, I propose a new method of IP-MPC uses individual pitch in order to accommodate the changes in each pitch interval and reduce pitch errors. The pitch extraction rate was evaluated autocorrelation method, cepstrum method and individual pitch extraction method. As a result, the extraction rate of individual pitch was 85% for female voice and 96%for male voice. Also, I knew that pitch extraction rate was better in individual pitch extraction method than autocorrelation method and cepstrum method. I have evaluated the speech quality of MPC and IP-MPC considering a cellular phone of 8kbps. As a result, I knew that synthesis speech of the IP-MPC was better in speech quality than synthesis speech of the MPC. The speech quality was evaluated both the SNRseg and MOS. As a result, the SNRseg of IP-MPC improved 1.4dB and 1.2dB in female and male voice. In case of MOS, it was 0.37 and 0.22 in female and male voice respectively. In conclusion, I have found out that speech quality of IP-MPC was better than speech quality of MPC.

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