At 01:35 PM 6/29/99 +1000, Mike Cheng wrote:
>> I'm not sure, haven't checked this much, but when I looked at the lame-mdct
>> code last summer, I found your MDCT-code much like the "Lee's Fast DCT
>> algorithm" I first found on
>> http://pentium.intel.com/drg/mmx/appnotes/ap528.htm
>
>I don't even *understand* lee's algorithm :) too much asm.
>Anyway, lee is talking about DCT's which are used in MPEG video and JPEG
coding.
>These are different from mdct transform used in mpeg audio coding.
>The MDCT is more than just a "modified" DCT. The DCT is a block transform and
>the MDCT is a lapped orthogonal transform. Malvar explains it much better
than
>I :)
Ok, I must have confused the transforms :)
Was looking on Bj�rn Wes�n's thesis at http://www.sparta.lu.se/~bjorn/whitney/
(http://www.sparta.lu.se/~bjorn/whitney/sources/fastimdct.c)
/jp (who wishes he knew more about signal processing..) :)
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