dct implemented by mmx/sse

dct implemented by mmx/sse

how to optimize the program for dct(descrete cosine transform)? i am not very clear about how to achieve that. i have read some application notes found in the web of intel. in the algorithms presented inthose application notes, thay decomposed the tranformation matrix, and why they should do so? and howcan the program for dct benifit from such decompose on the transformation matrix?
thank you. i hope somebody can tell. best wishes.

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