A new general distance measure for quantization of LSF and its transformedcoefficients

This paper presents a new general distance measure that not only can be use d in a vector quantization (VQ) of line spectrum frequency (LSF) parameters but also performs well in a LSF transformed domain. The new distance is ba sed on the spectral sensitivity of LSFs and their transformed coefficients. In addition, a fix scaling vector is used to decrease the sensitivity of s pectral error at higher frequencies. Experimental results have shown that t he proposed distance measure leads to as good as or better performance of V Q compared to other methods in the field of LSF coding. The use of this dis tance as the weighting-function of the LSF transformed parameters is also s uggested.