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| HAL : hal-00686323, version 1 |
| Fiche détaillée |  Récupérer au format |
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| International Symposium on I/V Communications and Mobile Networks, Rabat : Maroc (2010) |
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| Attack restoration in low bit-rate audio coding, using an algebraic detector for attack localization |
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| Imen Samaali 1, 2Monia Turki-Hadj Alouane 3 |
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| projet WARRIS, projet CMCU Collaboration(s) |
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| (30/09/2010) |
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| This paper deals with pre-echo reduction in low bit-rate audio compression. [1] proposed an attack restoration method based on the correction of the temporal envelop of the decoded signal. A small set of coef cients were then transmitted through a limited bit-rate auxiliary channel. However, the transmission of the transient position computed on the original audio signal was required. In this paper, we deployed a new method of attack localization based on differential algebraic, which guaranties a successful detection on the decoded audio signal. The algebraic method has also a reduced complexity compared to the index stationary detector used in [1]. The new proposed approach is evaluated for single audio coding-decoding, using objective perceptual measures. The experimental results for MP3 coding exhibits an ef cient restoration of the attacks and a signi cant improvement of the audio quality. |
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| 1 : | Unité Signaux et Systèmes (U2S) |
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Ecole Nationale d'Ingénieurs de Tunis |
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| 2 : | Centre de Recherche en Informatique de Paris 5 (CRIP5) |
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Université Paris V - Paris Descartes |
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| 3 : | Unité Signaux et Systèmes de l'Ecole Nationale d'Ingénieurs de Tunis |
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Ecole Nationale d'Ingénieurs de Tunis |
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| Unité Signaux et Systèmes |
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| Domaine | : | Sciences de l'ingénieur/Traitement du signal et de l'image Informatique/Traitement du signal et de l'image |
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| Temporal envelope – ARMA modeling – audio coding – sound attack – algebraic detector – attack restoration. |
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| Liste des fichiers attachés à ce document : | |||||
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| hal-00686323, version 1 | |
| http://hal.archives-ouvertes.fr/hal-00686323 | |
| oai:hal.archives-ouvertes.fr:hal-00686323 | |
| Contributeur : Imen Samaali | |
| Soumis le : Mercredi 11 Avril 2012, 16:02:46 | |
| Dernière modification le : Mercredi 11 Avril 2012, 16:39:57 | |
