[music-dsp] fixed point fft?
joshscholar at yahoo.com
Sun Apr 20 23:59:00 EDT 2003
----- Original Message -----
From: "Russell Borogove" <kaleja at estarcion.com>
To: <music-dsp at aulos.calarts.edu>
Sent: Sunday, April 20, 2003 2:06 PM
Subject: Re: [music-dsp] fixed point fft?
> > I'm working on lossless sound compression and one thing that's occurred
> > me is that for a losses decompressor to work across multiple platforms
> > of the arithmetic has to be exactly reproducible.
> What's the application for which you need it to be truly
> The original analog-to-digital conversion process probably
> introduced more noise than the noise floor of a 32-bit
> float. Worrying about what's going to happen to the 50th
> bit when a PowerPC FPU decodes something that was encoded
> by an Intel FPU seems silly.
You've got a good point. I'm still developing, I'll try to structure the
code so that the decompressor isn't too sensitive to this stuff. Maybe all
information that can cause a decision should be transmitted in a side band
so there's not possiblility of a threshold problem.
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