DCT/IDCT with minimum multiplication
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United States of America Patent
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Apr 25, 2006
Grant Date -
Sep 22, 2005
app pub date -
Aug 7, 2001
filing date -
Jul 31, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method, apparatus, computer medium, and other embodiments for discrete cosine transform and inverse discrete cosine transform (DCT/IDCT) of image signals are described. A DCT/IDCT module includes a plurality of different cores. One embodiment of a core includes two sets of lookup tables to provide multiplication and add operations for the DCT and IDCT functions. Another embodiment of a core include one set of lookup tables, while another embodiment of a core includes no lookup table. The DCT/IDCT module provides forward DCT and IDCT functionality without the use of additional multipliers.
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