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arXiv 2307.12232cs.SDeess.ASeess.SP
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基于全带幅度与相位双层一致性的梅尔频谱图信号重建

Signal Reconstruction from Mel-spectrogram Based on Bi-level Consistency of Full-band Magnitude and Phase

Tokyo Metropolitan University(东京都立大学)

Yoshiki Masuyama, Natsuki Ueno, Nobutaka Ono

AI总结:

针对从梅尔频谱图等低维频谱表示重建时域信号的问题,提出一种基于优化、利用全带幅度与相位双层关系联合重建的方法,经多类音频信号实验验证有效。

摘要:

我们提出一种基于优化的方法,用于从梅尔频谱图这类低维频谱表示中重建时域信号。相位重建研究旨在从全带短时傅里叶变换(STFT)幅度重建时域信号,Griffin-Lim算法(GLA)因仅依赖STFT的冗余性且适用于各类音频信号而被广泛使用。本文通过考虑时域信号、其STFT系数及其梅尔频谱图之间的双层关系,联合重建全带幅度与相位。该方法被构建为一个严格的优化问题,并基于GLA所用准则估计全带幅度。我们的实验在语音、音乐及环境信号上验证了该方法的有效性。

英文摘要:

We propose an optimization-based method for reconstructing a time-domain signal from a low-dimensional spectral representation such as a mel-spectrogram. Phase reconstruction has been studied to reconstruct a time-domain signal from the full-band short-time Fourier transform (STFT) magnitude. The Griffin-Lim algorithm (GLA) has been widely used because it relies only on the redundancy of STFT and is applicable to various audio signals. In this paper, we jointly reconstruct the full-band magnitude and phase by considering the bi-level relationships among the time-domain signal, its STFT coefficients, and its mel-spectrogram. The proposed method is formulated as a rigorous optimization problem and estimates the full-band magnitude based on the criterion used in GLA. Our experiments demonstrate the effectiveness of the proposed method on speech, music, and environmental signals.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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