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Robust low-delay audio coding using multiple descriptions

: Schuller, G.; Kovacevic, J.; Masson, F.; Goyal, V.K.


IEEE transactions on speech and audio processing 13 (2005), No.5, Part 2, pp.1014-1024
ISSN: 1063-6676
Journal Article
Fraunhofer IDMT ()

This paper proposes an encoding method for high-quality, low-delay audio communication that is robust to losses in packetized transmission. Robustness is provided by a multiple description vector quantization (MDVQ) technique that is designed to minimize the mean-squared error (MSE). The key to applying this technique effectively is the use of psycho-acoustically controlled pre- and post-filters that make the mean-squared quantization error perceptually relevant. Experiments show that the MDVQ-based encoder yields better results-in both MSE and subjective audio quality-than simple alternative coders with the same low delay.