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Bad math for video
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Joined: Jul 2006
Posts: 12,077 Likes: 7
Founder, Axiom Upgrade Club shareholder in the making
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OP
Founder, Axiom Upgrade Club shareholder in the making
Joined: Jul 2006
Posts: 12,077 Likes: 7 |
What Good is a Computer Processor That Does Bad Math? (Kotaku)This article made me think of Chris (ClubNeon) doing crazy amounts of video processing.
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Re: Bad math for video
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Joined: Dec 2003
Posts: 10,420
shareholder in the making
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shareholder in the making
Joined: Dec 2003
Posts: 10,420 |
That was quite interesting, for a second it had me thinking back to the intel problem from yester year.
Jason M80 v2 VP160 v3 QS8 v2 PB13 Ultra Denon 3808 Samsung 85" Q70
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Re: Bad math for video
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Joined: Feb 2009
Posts: 3,466
connoisseur
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connoisseur
Joined: Feb 2009
Posts: 3,466 |
When I was doing vector programming on the Cell processor I noticed that IBM was making a big deal about the Cell being able to perform double precision math while all GPUs at the time were limited to single.
But there was a 4x speed hit for using doubles over single precision floats. So the extra precision was there for people who needed it, but since I was processing raw data from camera sensors, that at most had 24-bits of precision (but the noise floor really only yielded 18-bits of accuracy), the single precision was enough.
Though the point is I could get the extra precision if I needed it. Chips that trade speed for accuracy will be extremely single purpose. There's no way to turn off the design flaw when you don't mind trading in the speed, like there is with traditional design.
Pioneer PDP-5020FD, Marantz SR6011 Axiom M5HP, VP160HP, QS8 Sony PS4, surround backs -Chris
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