논문에서는 해금 소리의 시간에 따른 변화를 사실적으로 묘사하기 위해 캡스트럼 분석을 이용한 전통 악기 해금의 스펙트
럼모델링을제안한다.정확한캡스트럼분석결과를얻기위해프레임사이즈는입력신호의3주기로하였고포만트추출에
더많은캡스트럼계수를활용하였다. 정현파성분합성과정에서대역통과필터의차단주파수를공명점별로유동적으로
조절하고노이즈성분에남아있는피크성분들을제거하는과정을추가하여성능을향상시켰다.음높이의변화를판단하기
위해입력프레임을묵음구간,어택구간,지속구간으로분류하였고기본주파수에따라프레임사이즈를가변적으로조절하
였으며 지속구간에서의 기본주파수 검출 오류를 수정함으로써 정확도를 향상시켰다. 해금 연주 전문가의 청취테스트를
통해 원음과 합성음이 96~100 % 유사하다는 평가 결과를 얻었다.This paper proposes a spectral modeling of Korean traditional instrument, Haegeum, using cepstral analysis to
naturally describe Haegeum sounds varying with time. To get a precise result of cepstral analysis, we set the frame
size to 3 periods of input signal and more cepstral coefficients are used to extract formants. The performance is
enhanced by flexibly controlling the cutoff frequency of bandpass filter depending on the resonances in the synthesis
process of sinusoidal components and the deleting peaks remained in the residual signal. To detect the change of
pitch, we divide the input frames into silence, attack, and sustain region and determine which region the current
frame is involved in. Then, the proposed method readjusts the frame size according to the fundamental frequency
in the case of the current frame is in attack region and corrects the extraction errors of the fundamental frequency
for the frames in sustain region. With these processes, the synthesized sounds are much more similar to the originals.
The evaluation result through the listening test by a Haegeum player says that the synthesized sounds are almost
similar to originals (96~100 % similar to the original sounds).