Title :
Expression of spectral distortion using line spectrum frequencies
Author_Institution :
Thomson-CSF, Gennevilliers
fDate :
9/1/1997 12:00:00 AM
Abstract :
Line spectrum frequencies (LSFs) are commonly used in the domain of speech coding as means of representing prediction filters. Quantization of these parameters needs evaluation of spectral distortion. The exact equation giving distortion is presented here using only LSFs. A simplified equation is also proposed as a good approximation
Keywords :
filtering theory; linear predictive coding; spectral analysis; speech coding; exact equation; line spectrum frequencies; linear prediction distortion; prediction filters; quantization; spectral distortion evaluation; speech coding; Bit rate; Distortion measurement; Energy measurement; Equations; Frequency; Interpolation; Nonlinear filters; Speech coding; Vector quantization; Vocoders;
Journal_Title :
Speech and Audio Processing, IEEE Transactions on
