Canonical transformations of the discrete cosine transform

Authors:
Mohamed F. Mansour
Affiliations:
Texas Instruments Inc., DSP Solutions R&D Center, Dallas, TX 75243, USA
Venue:
Signal Processing
Year:
2007

Citing 3
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Abstract

We provide different transformation formulae between the different discrete cosine transform (DCT) types of the same size. The transformations use only diagonal and special lower/upper triangular matrices that minimize the overhead of transformation. These transformations provide a tool for using any of the DCT types as a core module for computing all other types.