Regularization techniques for discrete cepstrum estimation

被引：34

作者：

Cappe, O

Moulines, E

机构：

[1] Dept. Signal/CNRS-URA 820, Ecl. Natl. Sup. des Telecom.

来源：

IEEE SIGNAL PROCESSING LETTERS | 1996年 / 3卷 / 04期

关键词：

Computational complexity - Convergence of numerical methods - Fourier transforms - Mathematical models - Matrix algebra - Parameter estimation;

D O I：

10.1109/97.489060

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The discrete cepstrum method consists in fitting a spectral envelope parameterized by cepstrum coefficients to a discrete set of spectral points using a log-spectral distortion criterion, Unfortunately, this estimation problem is ill conditioned in many cases of interest, This letter introduces a simple regularization technique that guarantees that the spectral envelope is well behaved. A modification of the basic regularization criterion is proposed in order to take into account a possible prior knowledge of the spectral tilt of the envelope.

引用

页码：100 / 102

页数：3