Skip to Main content Skip to Navigation
Conference papers

Joint source/channel decoding of scalefactors in MPEG-AAC encoded bitstreams

Abstract : This paper describes a bandwidth-efficient method for improved decoding of MPEG-AAC bitstreams when the encoded data are transmitted over a noisy channel. Assuming that the critical part (headers) of each frame has been correctly received, we apply a soft-decoding method to reconstruct the scalefactors, which represent a highly noise-sensitive part of the bitstream. The damaged spectral data are reconstructed using an intra-frame error concealment method. Two methods for soft decoding of scalefactors are described: blind mode and informed mode. In the latter, a very small amount of additional data is included in the bitstream. At medium SNR, this method provides a significant improvement in perceptual signal quality compared to the classical hard-decoding method.
Complete list of metadatas

Cited literature [23 references]  Display  Hide  Download
Contributor : Olivier Derrien <>
Submitted on : Friday, March 26, 2010 - 4:22:27 PM
Last modification on : Wednesday, April 8, 2020 - 3:53:52 PM
Document(s) archivé(s) le : Sunday, June 27, 2010 - 8:40:22 PM


Files produced by the author(s)


  • HAL Id : hal-00467527, version 1


Olivier Derrien, Michel Kieffer, Pierre Duhamel. Joint source/channel decoding of scalefactors in MPEG-AAC encoded bitstreams. EUSIPCO 2008, Aug 2008, Lausanne, Switzerland. CD-ROM (5 p.). ⟨hal-00467527⟩



Record views


Files downloads