TEMPORAL ENVELOPE CORRECTION FOR ATTACK RESTORATION IN LOW BIT-RATE AUDIO CODING

Abstract : At reduced bit rates, the audio compression affects transient parts of signals, which results in pre-echo and loss of attack character. We propose in this paper an attacks restoration method based on the correction of the temporal envelope of the decoded signal, using a small set of coefficients transmitted through an auxiliary channel. The proposed approach is evaluated for single and multiple coding-decoding, using objective perceptual measures. The experimental results for MP3 and AAC coding exhibits an efficient restoration of the attacks and a significant improvement of the audio quality.
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Imen Samaali, Monia Turki-Hadj Alouane, Gaël Mahé. TEMPORAL ENVELOPE CORRECTION FOR ATTACK RESTORATION IN LOW BIT-RATE AUDIO CODING. European Signal Processing Conference, Aug 2009, glasgow, European Union. ⟨hal-00686309⟩

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