Sinusoidal model based on instantaneous frequency attractors
Sinusoidal model based on instantaneous frequency attractors
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DOI：
10.1109/tsa.2005.858545
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发表时间：
2006-07
期刊：
影响因子：
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通讯作者：
Toshihiko Abe;M. Honda
中科院分区：
文献类型：
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作者：
Toshihiko Abe;M. Honda
我们提出了一种基于瞬时频率（IF）吸引子的正弦合成方法，该吸引子对应于谐波频率轨迹。该算法在提取精确的正弦分量方面是新颖的。由于中频吸引子的连续性定义明确且易于检测，因此中频吸引子可以从音频信号中提取出来，而无需任何明确的约束条件或复杂的算法，因此可以直接应用于正弦信号的合成。通过时间规整分析可以进一步提高IF吸引子分析的准确性，时间规整分析提高了频率快速变化的谐波分量的分辨率。我们描述了正弦合成和精确相位估计的过程，沿着的例子，也评估了时间弯曲对语音分析和合成的影响
We propose a sinusoidal synthesis method based on instantaneous frequency (IF) attractors, which correspond to harmonic frequency trajectories. The algorithm is novel in extracting accurate sinusoidal components. Since the continuity of IF attractors is well-defined and simple to detect, the IF attractors can be extracted from audio signals without any explicit constraint or complicated algorithm; therefore, they can be directly applied to sinusoidal synthesis. Accuracy of IF attractor analysis can be further improved by time-warping analysis, which improves resolution for harmonic components whose frequencies that change rapidly. We describe the procedure for sinusoidal synthesis and precise phase estimation along with examples and also evaluate the effect of time-warping on analysis and synthesis of speech