No difference in quality between skal & IEEE, checked with subtract() & levels()

also it's the default in dgindex, nuff said http://img407.imageshack.us/img407/9051/happy2bb.gif

edit:

32-bit MMX (1 in INI file, D2V file and CLI)
32-bit SSE MMX (2)
32-bit SSE2 MMX (3)
64-bit Floating Point (4)
IEEE-1180 Reference (5)
Skal SSE MMX (6)
Simple MMX (7)
Algorithms that are not supported by your processor are automatically deleted from the menu, so you may not see all of the above options.

The iDCT algorithm that you should use depends primarily on what CPU you have, and to a lesser degree on the desired iDCT accuracy. All of the available options are IEEE-1180 compliant. For more information on iDCTs please see the DGDecode manual.

Quality: IEEE-1180 Reference > 64-bit Floating Point > Remaining iDCTs.

Speed: SSE2MMX is the fastest. IEEE-1180 Reference is the slowest.
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