DISCRETE ALL-POLE MODELING

被引：180

作者：

ELJAROUDI, A ^{[1
]}

MAKHOUL, J ^{[1
]}

机构：

[1] BOLT BERANEK & NEWMAN INC,CAMBRIDGE,MA 02138

来源：

IEEE TRANSACTIONS ON SIGNAL PROCESSING | 1991年 / 39卷 / 02期

关键词：

D O I：

10.1109/78.80824

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：

A new method is introduced for parametric modeling of spectral envelopes when only a discrete set of spectral points is given. This method, which we call discrete all-pole (DAP) modeling, uses a discrete version of the Itakura-Saito distortion measure as its error criterion. One result is a new autocorrelation matching condition that overcomes the limitations of linear prediction and produces better fitting spectral envelopes for spectra that are representable by a relatively small discrete set of values, such as in voiced speech. We present an iterative algorithm for DAP modeling that is shown to converge to a unique global minimum. We also present results of applying DAP modeling to real and synthetic speech. DAP modeling is extended to allow frequency-dependent weighting of the error measure, so that spectral accuracy can be enhanced in certain frequency regions relative to others.

引用

页码：411 / 423

页数：13