关键词: 音高显著性的连续性, 高次谐波的稳定性, 似然性函数, 旋律提取

Abstract: Aiming at the mutual interference of different sound sources in polyphonic music, the pitch sequence of the same sound source is discontinuous. According to the continuity of the pitch salience and the stability of the higher harmonics, a new method of creating pitch contours is proposed that based on pitch static likelihood function and pitch salience dynamic likelihood function. Before extracting melody pitch contour, to take advantage of the timbral inconsistency of different sound sources, the Mel-frequency cepstral coefficients of the pitch contour is proposed as the timbre feature and the timbre characteristics are also calculated from the harmonic amplitudes of the pitch contour. The improved algorithm is simulated on the RECHSET music datasets, and the results show that it achieves the raw pitch estimation of 62.04% and the overall accuracy of 55.08%.

Key words: the continuity of the pitch salience, the stability of the higher harmonics, likelihood function, melody extraction