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Coding Overcomplete Representations of Audio Using the MCLT

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Coding Overcomplete Representations of Audio Using the MCLT
We propose a system for audio coding using the modulated complex lapped transform (MCLT). In general, it is difficult to encode signals using overcomplete representations without avoiding a penalty in rate-distortion performance. We show that the penalty can be significantly reduced for MCLT-based representations, without the need for iterative methods of sparsity reduction. We achieve that via a magnitude-phase polar quantization and the use of magnitude and phase prediction. Compared to systems based on quantization of orthogonal representations such as the modulated lapped transform (MLT), the new system allows for reduced warbling artifacts and more precise computation of frequency-domain auditory masking functions.
Byung-Jun Yoon, Henrique S. Malvar
Added 07 Dec 2010
Updated 07 Dec 2010
Type Conference
Year 2008
Where DCC
Authors Byung-Jun Yoon, Henrique S. Malvar
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