We study the problem of compression for the purpose of similarity identification, where
similarity is measured by the mean square Euclidean distance between vectors. While the …

In this contribution a new wideband audio coding concept is presented that provides good
audio quality at bit rates below 3 bits per sample with an algorithmic delay of less than 10 …

A new class of space time codes with high performance is presented. The code design
utilizes tailor-made permutation codes, which are known to have large minimal distances as …

A new design method for high rate, fully diverse ('spherical') space frequency codes for
MIMO-OFDM systems is proposed, which works for arbitrary numbers of antennas and …

We propose, in this paper, the construction of noncoherent spherical constellations, both
uncoded and coded, by mapping a T-1 dimensional constellation carved from/spl Zopf/[i]/sup …

In this paper, we analyze Logarithmic Cubic Vector Quantization (LCVQ), a novel type of
gain-shape vector quantization (GSVQ). In LCVQ, the vector to be quantized is decomposed …

Several researchers considered logarithmic spherical signal quantization. The design of a
logarithmic spherical quantizer in k dimensions is considered in this paper. Logarithmic …

Neste trabalho apresentamos uma proposta de quantizador vetorial de fontes gaussianas
que combina códigos esféricos em camadas de toros e a técnica shape/gain. Os conceitos …

Permutation codes are a class of structured vector quantizers with a computationally-simple
encoding procedure based on sorting the scalar components. Using a codebook comprising …

We present a new systematic approach to constructing spherical codes in dimensions 2k,
based on Hopf foliations. Using the fact that a sphere S2n− 1 is foliated by manifolds Sn− 1 …