Optimizing the Free Distance of Error-Correcting Variable-Length Codes
Résumé
This paper considers the optimization of Error- Correcting Variable-Length Codes (EC-VLC), which are a class of joint-source channel codes. The aim is to find a prefix-free codebook with the largest possible free distance for a given set of codeword lengths, ℓ = (ℓ1, ℓ2, . . . , ℓM). The proposed approach consists in ordering all possible codebooks associated to ℓ on a tree, and then to apply an efficient branch-and-prune algorithm to find a codebook with maximal free distance. Three methods for building the tree of codebooks are presented and their efficiency is compared.
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Poster_MMSP10.pdf (81.26 Ko)
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Origine | Fichiers produits par l'(les) auteur(s) |
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Format | Autre |
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