A Study on 8kbps FBD-MPC Method Considering Low Bit Rate

Low Bit Rate을 고려한 8kbps FBD-MPC 방식에 관한 연구

  • Lee, See-Woo (Dept. of Information and Telecommunication Engineering, Sangmyung University)
  • 이시우 (상명대학교 정보통신공학과)
  • Received : 2014.04.02
  • Accepted : 2014.06.20
  • Published : 2014.06.28


In a speech coding system using excitation source of voiced and unvoiced, it would be involved a distortion of speech quality in case coexist with a voiced and unvoiced consonants in a frame. In this paper, I propose a method of 8kbps Multi-Pulse Speech Coding(FBD-MPC: Frequency Band Division MPC) by using TSIUVC(Transition Segment Including Unvoiced Consonant) searching, extraction and approximation-synthesis method in a frequency domain. I evaluate the 8kbps MPC and FBD-MPC. As a result, SNRseg of FBD-MPC was improved 0.5dB for female voice and 0.2dB for male voice respectively. Compared to the MPC, SNRseg of FBD-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.


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


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