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http://dx.doi.org/10.7776/ASK.2010.29.1.069

A Study on the Pitch Extraction Improvement Using LSP for the Synthesis of High Speech Quality  

Seo, Ji-Ho (숭실대학교 정보통신전자공학부)
Kim, Jong-Kuk (숭실대학교 정보통신전자공학부)
Bae, Myung-Jin (숭실대학교 정보통신전자공학부)
Publication Information
The Journal of the Acoustical Society of Korea / v.29, no.1, 2010 , pp. 69-75 More about this Journal
Abstract
In this paper, the pitch is detected after the elimination of formant ingredients by flattening the spectrum in frequency domain. In order to remove impact of formant and transition frequency in the signal spectrum, formant envelop is made by linear interpolation with any points each sub-band and the spectrum of speech signal is compensated by the reverse of the envelop interpolated linearly after we divide frequency band into several segment based on LSP and detect the points. The experimental result showed the proposed method appeared an outstanding performance in compared with LPC, Cepstrum, Lifter methods. The method reduced the gross error rate 1.30% than the LPC method which appeared a good performance except the proposed method. Also, the proposed method showed low error rate in noise environment.
Keywords
Pitch; Pitch Detection; Spectrum Flattening; LSP; Formant;
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