On the relationship between root interpolation and LSP interpolation

Author

Lashkari, Khosrow

Author_Institution

DoCoMo USA Labs., San Jose, CA, USA

Volume

1

fYear

2002

fDate

3-6 Nov. 2002

Firstpage

188

Abstract

Line spectrum pair (LSP) was first introduced by Itakura (1975) as an alternative representation for the LPC spectral information. It was later found that LSPs have very desirable quantization and interpolation properties. Interpolation of LSPs at the frame boundaries results in a synthesized speech that is smoother and has higher quality. This paper compares the two methods of interpolation: 1) interpolating the LSPs derived from the LPC coefficients vs. 2) computing the LSPs from interpolated roots of the LPC polynomial. Experimental results obtained using four to six second long male and female sentences suggest that these two sets of LSPs are effectively equivalent.

Keywords

interpolation; linear predictive coding; speech coding; speech synthesis; LPC coefficient; LPC polynomials; LSP interpolation; frame boundaries; interpolation properties; line spectrum pair; linear predictive coding; root interpolation; spectral information; synthesized speech; Codecs; Dynamic range; Interpolation; Laboratories; Linear predictive coding; Nonlinear filters; Polynomials; Quantization; Signal synthesis; Speech synthesis;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 2002. Conference Record of the Thirty-Sixth Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-7576-9

Type

conf

DOI

10.1109/ACSSC.2002.1197173

Filename

1197173