Proceedings of the 2007 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, pp. 239-242, New Paltz, NY, October 21-24, 2007.doi: 10.1109/ASPAA.2007.4393036
Abstract: Layered audio coding typically offers reduced distortion as bit rate is increased, but that distortion is spread across the entire band until the lossless coding bit rate is reached and distortion is eliminated. We propose a layered audio coding paradigm of bandwidth extension, rather than distortion reduction. For example, a core layer can provide lossless coding of a 24 kHz bandwidth signal (fs=48 kHz), then first and second bandwidth extension lossless layers can extend that signal to losslessly coded 48 and then 96 kHz bandwidths (fs=96 and 192 kHz).
Keywords: frequency; bandwidth; bit rate; Passband; acoustic distortion; audio coding; band pass filters; Finite impulse response filter; Sampling methods; signal resolution
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Stephen D. Voran
Institute for Telecommunication Sciences
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