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http://dx.doi.org/10.7472/jksii.2017.18.5.17

A Study on PCFBD-MPC in 8kbps  

Lee, See-woo (Smart Information and Telecommunication Engineering, SANGMYUNG UNIV)
Publication Information
Journal of Internet Computing and Services / v.18, no.5, 2017 , pp. 17-22 More about this Journal
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. This paper present PCFBD-MPC( Position Compensation Frequency Band Division-Multi Pulse Coding ) used V/UV/S( Voiced / Unvoiced / Silence ) switching, position compensation in a multi-pulses each pitch interval and Unvoiced approximate-synthesis by using specific frequency in order to reduce distortion of synthesis waveform. Also, I was implemented that the PCFBD-MPC( Position Compensation Frequency Band Division-Multi Pulse Coding ) system and evaluate the SNRseg of PCFBD-MPC in coding condition of 8kbps. As a result, SNRseg of PCFBD-MPC was 13.4dB for female voice and 13.8dB for male voice respectively. In the future, I will study the evaluation of the sound quality of 8kbps speech coding method that simultaneously compensation the amplitude and position of multi-pulse source. These methods are expected to be applied to a method of speech coding using sound source in a low bit rate such as a cellular phone or a smart phone.
Keywords
Cellular Phone; Smart Phone; Internet Phone;
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Times Cited By KSCI : 1  (Citation Analysis)
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