Hi,
every DSP has libraries as DSPLIB for TMS5xxx optimised for this chip.
Cheers
Reply by Erik de Castro Lopo●August 17, 20032003-08-17
Eric Jacobsen wrote:
>
> Erik, I like your sig.
:-).
Yep, I think this world would be a beter place if if the
stupidity or religion was confined to the dustbin of history.
> Minister of Algorithms, Intel Corp.
I still like that title.
Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo nospam@mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
From Time magazine, "Numbers" section:
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$75 million: Budget for "Deep Impact", a film about the
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Reply by Eric Jacobsen●August 17, 20032003-08-17
Erik, I like your sig.
- Eric
On Sat, 16 Aug 2003 22:48:12 GMT, Erik de Castro Lopo
<nospam@mega-nerd.com> wrote:
>Its been a while since I last looked at FFTW, but I believe that
>you need to use the FFTW_BACKWARD flag to get the inverse FFT.
>I also seem to remember that you still need to do the scaling by
>1/N yourself.
>
>Erik
>--
>+-----------------------------------------------------------+
> Erik de Castro Lopo nospam@mega-nerd.com (Yes it's valid)
>+-----------------------------------------------------------+
>"I contend that we are both atheists. I just believe in one fewer god
>than you do. When you understand why you dismiss all the other possible
>gods, you will understand why I dismiss yours." -- Stephen Roberts
Eric Jacobsen
Minister of Algorithms, Intel Corp.
My opinions may not be Intel's opinions.
http://www.ericjacobsen.org
Reply by Erik de Castro Lopo●August 16, 20032003-08-16
Parlous wrote:
>
> well, holy snot balls. i was unaware that going from "complex to real" in
> the fftw meant an inverse transform. i ignored it when i was concerned with
> the fft only, thinking it had to do something with going forward/backward
> meaning postive versus negative frequencies!
Its been a while since I last looked at FFTW, but I believe that
you need to use the FFTW_BACKWARD flag to get the inverse FFT.
I also seem to remember that you still need to do the scaling by
1/N yourself.
Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo nospam@mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
"I contend that we are both atheists. I just believe in one fewer god
than you do. When you understand why you dismiss all the other possible
gods, you will understand why I dismiss yours." -- Stephen Roberts
Reply by Parlous●August 16, 20032003-08-16
well, holy snot balls. i was unaware that going from "complex to real" in
the fftw meant an inverse transform. i ignored it when i was concerned with
the fft only, thinking it had to do something with going forward/backward
meaning postive versus negative frequencies!
whelp, things like that happen when you're totally new to the dsp world i
guess!
"Parlous" <parlous@hotmail.com> wrote in message
news:vjt4cs2aidp0ee@corp.supernews.com...
>
> I have used FFTW for my fourier operations in the past, but is there a
> inverse fourier transform library of some sort out there that is just as
> fast?
>
>
Reply by Erik de Castro Lopo●August 16, 20032003-08-16
Parlous wrote:
>
> I have used FFTW for my fourier operations in the past, but is there a
> inverse fourier transform library of some sort out there that is just as
> fast?
FFTW can already do that. Why would you want another library?
Erik
--
+-----------------------------------------------------------+
Erik de Castro Lopo nospam@mega-nerd.com (Yes it's valid)
+-----------------------------------------------------------+
"The Internet interprets censorship as damage, and routes around it."
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Reply by Parlous●August 16, 20032003-08-16
I have used FFTW for my fourier operations in the past, but is there a
inverse fourier transform library of some sort out there that is just as
fast?