加博尔变换中的最优窗口与格。在音频分析中的应用。
Optimal Window and Lattice in Gabor Transform. Application to Audio Analysis.
作者信息
Lachambre Helene, Ricaud Benjamin, Stempfel Guillaume, Torrésani Bruno, Wiesmeyr Christoph, Onchis-Moaca Darian
机构信息
Genesis Acoustics, Domaine du Petit Arbois, 13545 Aix-en-Provence, France.
Signal Processing Laboratory 2, Ecole Polytechnique Fédérale de Lausanne (EPFL), Station 11, 1015 Lausanne, Switzerland.
出版信息
Proc Int Symp Symb Numer Algorithms Sci Comput. 2015;17:109-112. doi: 10.1109/SYNASC.2015.25.
This article deals with the use of optimal lattice and optimal window in Discrete Gabor Transform computation. In the case of a generalized Gaussian window, extending earlier contributions, we introduce an additional local window adaptation technique for non-stationary signals. We illustrate our approach and the earlier one by addressing three time-frequency analysis problems to show the improvements achieved by the use of optimal lattice and window: close frequencies distinction, frequency estimation and SNR estimation. The results are presented, when possible, with real world audio signals.
本文探讨了离散伽柏变换计算中最优格点和最优窗口的使用。在广义高斯窗口的情况下，在扩展早期贡献的基础上，我们为非平稳信号引入了一种额外的局部窗口自适应技术。我们通过解决三个时频分析问题来说明我们的方法和早期的方法，以展示使用最优格点和窗口所取得的改进：相近频率区分、频率估计和信噪比估计。如有可能，结果将与真实世界的音频信号一起呈现。
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