DocumentCode :
2287350
Title :
Efficient interconversion algorithm for PARCOR and LSP parameters
Author :
Chan, C.F.
Author_Institution :
Dept. of Electron. Eng., City Polytech. of Hong Kong, Kowloon, Hong Kong
fYear :
1994
fDate :
13-16 Apr 1994
Firstpage :
603
Abstract :
The paper introduces an efficient algorithm for calculating line spectrum frequencies from PARCOR coefficients and vice versa. The algorithm employs a recursive technique to generate the line spectrum from PARCOR coefficients. In each recursion, a rotation and scaling operations on the complex frequency plane are required. The even and odd line spectrum frequencies are found to be the zero crosspoints on the real and imaginary axis of the complex plane, respectively. The paper also points out some interesting relationships between PARCOR coefficients and line spectrum frequencies. These relationships can be exploited to formulate a more efficient quantization scheme for coding LPC parameters at 30 bits per frame with transparent quality
Keywords :
analogue-digital conversion; correlation methods; linear predictive coding; parameter estimation; recursive functions; spectral analysis; speech coding; LPC parameter; LSP parameters; PARCOR parameters; complex frequency plane; interconversion algorithm; line spectrum frequencies; line spectrum pair; linear predictive coding; partial correlation; quantization scheme; recursive technique; rotation; scaling operations; zero crosspoints; Cities and towns; Dynamic range; Equations; Fixed-point arithmetic; Frequency domain analysis; Linear predictive coding; Organizing; Polynomials; Quantization; Speech coding;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Speech, Image Processing and Neural Networks, 1994. Proceedings, ISSIPNN '94., 1994 International Symposium on
Print_ISBN :
0-7803-1865-X
Type :
conf
DOI :
10.1109/SIPNN.1994.344839
Filename :
344839
Link To Document :
بازگشت