Hl. Vu et L. Lois, Efficient distance measure for quantization of LSF and its Karhunen-Loeve transformed parameters, IEEE SPEECH, 8(6), 2000, pp. 744-746
This paper presents a new distance measure that is based on the spectral se
nsitivity of the line spectrum frequency parameters (LSFs) and its Karhunen
-Loeve (KL) transformed coefficients. It is shown that the proposed distanc
e measure achieves better performance of vector quantization (VQ) compared
to other methods in the field of LSF coding. In most cases, the percentage
of outliers is reduced when using the new one, compared to the best results
of using other conventional weighting functions. The use of this distance
as the weighting function of the LSF transformed parameters is also suggest
ed.