Attack restoration in low bit-rate audio coding, using an algebraic detector for attack localization

Imen Samaali 1, 2 Monia Turki-Hadj Alouane 3 Gaël Mahé 2
1 U2S - Unité Signaux et Systèmes
2 CRIP5 - EA 2517 - Centre de Recherche en Informatique de Paris 5
3 Unité Signaux et Systèmes
Unité Signaux et Systèmes de l'Ecole Nationale d'Ingénieurs de Tunis
Abstract : 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.
Keywords : attack restoration Temporal envelope ARMA modeling audio coding sound attack algebraic detector attack restoration.
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Conference papers
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Imen Samaali, Monia Turki-Hadj Alouane, Gaël Mahé. Attack restoration in low bit-rate audio coding, using an algebraic detector for attack localization. International Symposium on I/V Communications and Mobile Networks, Sep 2010, Rabat, Morocco. ⟨hal-00686323⟩

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