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Technology Stocks : Apple Inc. -- Ignore unavailable to you. Want to Upgrade?

To: miraje who wrote (34133)	7/22/2002 7:17:35 PM
From: Dave	Read Replies (1) \| Respond to of 213182

I wouldn't put a whit of faith in Charlie White's benchmarks. He says "Some readers complained that the prior test was rigged because we used a QuickTime codec on the Mac but a Video For Windows codec on the PC, so this time, even though it truly doesn't make even a quarter-second's difference in the render times, we've employed the QuickTime Graphics codec on both PCs and the Mac..." QuickTime's Graphics codec (also called "Sean's Secret Recipe) is a ten-year-old legacy codec optimized for 8-bit graphics. It is one of the few (besides Road Pizza) QuickTime codecs that was never Altivec accelerated, simply because it's never really used (except apparently for Charlie White's benchmarks). In order to compress with the Graphics codec, QuickTime's Image Compression Manager converts each frame to 8-bit via an Inverse Color Lookup Table (which is memory intensive and gives an advantage to PC systems with faster memory bandwidth, and then compresses. The only reason you would choose to use one of these old codecs that have not been optimized to use Altivec is if you were trying to save face after printing a bogus comparison between QuickTime and Video for Windows and you wanted to erase any PowerPC advantages. Dave