Title :
Line-spectrum pairs-a review
Author :
Smith, A.C. ; van Schalkwyk, J.J.D.
Author_Institution :
Dept. of Electron. & Comput. Eng., Pretoria Univ., South Africa
Abstract :
Line-spectrum pairs (LSPs) are presented as an alternative coding method for the vocal tract parameters of a linear predictive vocoder. These parameters provide improved control over the perceptual effect of quantization and coding. Two methods for determining the LSP-parameters are discussed, one making use of the fast Fourier transform, and the other of a ratio filter. A saving of 25% in coded bit rate is achieved when compared to 40-bit linear predictive coding
Keywords :
encoding; fast Fourier transforms; filtering and prediction theory; speech analysis and processing; vocoders; coding; fast Fourier transform; line spectrum pairs; linear predictive vocoder; ratio filter; vocal tract parameters; Bandwidth; Boundary conditions; Filters; Frequency; Linear predictive coding; Polynomials; Quantization; Reflection; Speech coding; Speech processing;
Conference_Titel :
Communications and Signal Processing, 1988. Proceedings., COMSIG 88. Southern African Conference on
Conference_Location :
Pretoria
Print_ISBN :
0-87942-709-4
DOI :
10.1109/COMSIG.1988.49292
