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arXiv 0912.2363math.FA
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一种新的自适应时频表示方法--QuiltedGabor框架

Quilted Gabor frames - a new concept for adaptive time-frequency representation

Monika Doerfler

摘要:

诸如音频信号的某些信号类别要求具有适应信号属性的能力的信号表示。在这篇文章中,我们介绍了绗缝框架的新概念,其目的是在时频表示的自适应性。与Gabor或小波框架相反,这类新的框架允许信号分析适应所考虑的信号的局部要求。以信号自适应的方式直接在时间-频域中构造绗缝帧。帧属性的有效性保证了重建原始信号的可能性。框架属性示出了特定的情况下,贝塞尔性质证明了一般设置。还提供了根据绗缝Gabor框架获得的系数进行重建的策略和数值模拟。

英文摘要:

Certain signal classes such as audio signals call for signal representations with the ability to adapt to the signal's properties. In this article we introduce the new concept of quilted frames, which aim at adaptivity in time-frequency representations. As opposed to Gabor or wavelet frames, this new class of frames allows for the adaptation of the signal analysis to the local requirements of signals under consideration. Quilted frames are constructed directly in the time-frequency domain in a signal-adaptive manner. Validity of the frame property guarantees the possibility to reconstruct the original signal. The frame property is shown for specific situations and the Bessel property is proved for the general setting. Strategies for reconstruction from coefficients obtained with quilted Gabor frames and numerical simulations are provided as well.

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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