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Discussion Groups | Analog Devices DSPs | FFT analysis and save this result in Harddisk
Technical discussions related to Analog Devices DSPs (including Blackfin, TigerSHARC, SHARC and ADSP-21xx DSPs).
FFT analysis and save this result in Harddisk - muratmicrochip - May 14 6:43:00 2005
For ADSP21161 EZ-KitLite,i must get samples from ADCand to make a
FFT analysis and save this result in Harddisk or RAM of DSP.(for
recognizing voices)
i am a student at Y.T.U. Uni electrical engineering-control dep.i
need a project for a lesson,but because for my exams i could not
write any program for ADSP21161 and EZ-KitLite.I have only 4 days
finish this program.please send me any program that i need.(please
send me a program which runs easyly,because i dont know anything
more about dsp,i know only some 8 bit MCU)
1:i will use mic-in of Ez-KitLite like Talkthru (analog in).
2:i must make FFT(or DFT in fact harmonic analysis for recognizing
voice) analysis of a little voice sampling:for exm:1 second.
3:than i must store this fft result to harddisc or RAM of 21161.
4:than i will get again sampling from another voice for 1 second.
5:and i will make fft analysis for this sampling again.
6:finally i must be compare with last analysis and old fft result.
7:all in all i must be turn on one of the flag leds,if two anlysis
are same or nearly equal.
please send me this program,or pieces of programs of some pieces
of this titles.and tell me for which title it is.
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Re: FFT analysis and save this result in Harddisk - Mike Rosing - May 14 15:03:00 2005
It will be mighty hard to do anything like that in 4 days!
But I suggest if you are willing to lose some sleep, you will find what
you need on the ADI web site. There are FFT routines there, and they
run on EZ-kits. Stick to ram for storage.
Use the largest fft example possible, and take many overlaping samples.
I think a 50% overlap should work. Then for your 1 second sample, you
will have many fft's over many time sections. If there is a 50% overlap
you should see things change with time. Syncing things will be your
largest challenge - you will need to see how similar data blocks start
in different places.
Good luck. It won't be easy even if you just copy code.
Patience, persistence, truth,
Dr. mike
On Sat, 14 May 2005, muratmicrochip wrote:
> For ADSP21161 EZ-KitLite,i must get samples from ADCand to make a
> FFT analysis and save this result in Harddisk or RAM of DSP.(for
> recognizing voices)
>
> i am a student at Y.T.U. Uni electrical engineering-control dep.i
> need a project for a lesson,but because for my exams i could not
> write any program for ADSP21161 and EZ-KitLite.I have only 4 days
> finish this program.please send me any program that i need.(please
> send me a program which runs easyly,because i dont know anything
> more about dsp,i know only some 8 bit MCU)
> 1:i will use mic-in of Ez-KitLite like Talkthru (analog in).
> 2:i must make FFT(or DFT in fact harmonic analysis for recognizing
> voice) analysis of a little voice sampling:for exm:1 second.
> 3:than i must store this fft result to harddisc or RAM of 21161.
> 4:than i will get again sampling from another voice for 1 second.
> 5:and i will make fft analysis for this sampling again.
> 6:finally i must be compare with last analysis and old fft result.
> 7:all in all i must be turn on one of the flag leds,if two anlysis
> are same or nearly equal.
>
> please send me this program,or pieces of programs of some pieces
> of this titles.and tell me for which title it is. >
(You need to be a member of adsp -- send a blank email to adsp-subscribe@yahoogroups.com )