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Hier finden Sie wissenschaftliche Publikationen aus den FraunhoferInstituten. Embedded Voronoi codes for successive refinement lattice vector quantization
 Institute of Electrical and Electronics Engineers IEEE; IEEE Signal Processing Society: IEEE International Conference on Acoustics, Speech and Signal Processing, ICASSP 2013. Proceedings. Vol.8 : Vancouver, British Columbia, Canada, 26  31 May 2013 Piscataway, NJ: IEEE, 2013 ISBN: 9781479903573 ISBN: 9781479903566 pp.58055809 
 International Conference on Acoustics, Speech, and Signal Processing (ICASSP) <38, 2013, Vancouver> 

 English 
 Conference Paper 
 Fraunhofer IIS () 
Abstract
Lattice Vector Quantization (LVQ) is an interesting tool in source coding which can take advantage of a higher dimension than the scalar case while overcoming complexity limitations of conventional vector quantization. However, the high dimension and the relatively complex indexing of the codebooks make LVQ often unsuitable for getting a successive refinement of the source. For addressing this problem, the paper proposes a new class of LVQ called the embedded Voronoi codes. The new codes can gradually describe the source with a granularity of 1 bit/dimension by properly combining differently scaled Voronoi codes. A ratedistortion evaluation for a Gaussian source shows that the embedding of the codes comes at a minimal cost at low bitrates while preserving LVQ advantages over scalar quantization.