DCT Float in JPEG, Who use this?

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RGBA
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DCT Float in JPEG, Who use this?

Post by RGBA » Sun Aug 31, 2008 5:02 pm

I just wanted to ask you, did you ever used the floating-point DCT method?
The following differences are just compared between DCT float and DCT int (slow) method.

Pro:
- more accurate (depend on CPU)
- the difference should be not visible
- lower size

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Re: DCT Float in JPEG, Who use this?

Post by xnview » Mon Sep 01, 2008 9:22 am

RGBA wrote: The following differences are just compared between DCT float and DCT int (slow) method.
You means DCT float (slow) :-)
Pierre.

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RGBA
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Post by RGBA » Mon Sep 01, 2008 11:03 am

There is only one float mode, so why should I add slow? :?

If you relate to the Streaming SIMD Extensions (SSE),
the common Applications (for example XnView) support just the one.

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