Presented a method for quantizing the wideband line spectrum frequencies (LSF) with a specific class of near-ellipsoidal lattice codes referred to as "generalized Voronoi codes". Optimization procedures are described with respect to a weighted mean-square error (WMSE). The lattices D16, RE16 or RLambda16 are applied to quantize the LSF with no frequency splitting. Results indicate that near-ellipsoidal lattice quantization allows to develop efficient one-stage algebraic wideband LSF quantization at competitive bit rates.

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Bibliographic reference.  Ragot, Stephane / Lahdili, Hassan / Lefebvre, Roch (2001): "Wideband LSF quantization by generalized voronoi codes", In EUROSPEECH-2001, 2319-2322.