Incorporating perception into LSF quantization some experiments

In the context of vector quantization (VQ) of the line spectrum frequency (LSF) parameters, we determine experimentally a spectral distribution of quantization error perceived to be “balanced”, i.e., error at all frequencies contributing equally, on average, to the perceived distortion. Quantizers which have a balanced distribution should outperform those which don´t, given the same number of bits. We examine the spectral error distributions produced by various weighted Euclidean distance measures in the LSF domain and develop one which produces a quantizer having an approximately balanced distribution. This quantizer´s performance is compared with that of others having different error distributions