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Method for Melody Pitch Candidate Extraction of Polyphonic Audio based on Harmonic Structure Model
Method for Melody Pitch Candidate Extraction of Polyphonic Audio based on Harmonic Structure Model
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机译:基于谐波结构模型的和弦音频旋律音高候选值提取方法
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摘要
PURPOSE: A method for melody pitch candidate extraction of polyphonic audio based on a harmonic structure model is provided to extract melody pitch candidates in an audio signal including various sounds. CONSTITUTION: An audio signal including various sounds are short Fourier transformed(S10). The unit of the Fourier transformed audio signal is changed into a cent from Hz(S20). A peak point is extracted from each frame of the audio signal which was transformed to the cent unit(S30). The weight of a harmonic structure model which is included in candidate melody pitches is measured(S40). An energy level difference by a frequency is compensated based on the weight information(S50).
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