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对于“倒双谱”并不熟悉,在网上查了一下,原是倒谱的一种,在IEEE的一篇文章中有介绍:
“Comparison of cepstrum based methods for radial blind deconvolutionof ultrasound images” Computer-Based Medical Systems, 1996., Proceedings Ninth IEEE Symposium on
在摘要中说了有七种倒谱:
Compares the performance of seven different cepstrum based methods for radial blind deconvolution of medical ultrasound images. The first is the generalized cepstrum method and the second is the spectral root cepstrum method. All the last five methods calculate the complex cepstrum, but different computational techniques are employed to reduce or eliminate aliasing, phase unwrapping or effects of noise. The third method simply computes the real cepstrum. The fourth method computes the complex cepstrum using phase unwrapping, the fifth substitutes differentiation for phase unwrapping, the sixth uses polynomial rooting in the spatial domain, and the seventh computes the complex cepstrum from the bispectrum.
在MATLAB提供的信号处理工具箱中只有我上贴中提到的两种倒谱计算方法。 |
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