A unified approach to the fast computation of evenly and oddly stacked modified discrete cosine transform (MDCT) and modified discrete sine transform (MDST) is presented. Although the evenly and oddly stacked MDCT/MDST are quite different filter banks, there exists an intimate relation between them, and consequently, the efficient oddly stacked MDCT/MDST computation can be realized via the evenly stacked MDCT/MDST and vice versa only by simple preprocessing and postprocessing of input and output data sequences. In particular, it is shown that the transposed evenly and oddly stacked MDCT and MDST matrices are actually the generalized inverses or pseudoinverses of their corresponding forward transform matrices.
A unified fast computation of the evenly and oddly stacked MDCT/MDST
2003-01-01
266440 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
A Unified Fast Computation of the Evenly and Oddly Stacked MDCT/MDST
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