## Forums comp.dsp

## Time-varying overlap-add FFT filtering?

inI'm thinking of trialing with overlap-add FFT filtering, but rather than ha= ving a static filter (the filter stays the same after the design)...

I'm thinking of trialing with overlap-add FFT filtering, but rather than ha= ving a static filter (the filter stays the same after the design) I'd like = to implement a time-varying overlap-add FFT filter. So that I can modify th= e gain and frequency characteristics of the filter perhaps in an "adaptive"= way over time. However, my question regarding this is how can I get smooth adjustmen...

## Why not just make FIRs by hand?

inI'm looking to use the overlap-add FFT technique for doing FIR filtering and many of the examples I've seen use some more known FIR design...

I'm looking to use the overlap-add FFT technique for doing FIR filtering and many of the examples I've seen use some more known FIR design method such as the window method for designing the FIR that will be convolved with the input. However, To me it seems like in the overlap-add FFT technique it should be possible to define the FIR by hand by simply drawing the frequency response as values ...

## Computer made with a zilog chip

inI am going to make a computer or at least attempt to using some CPU chips and breadboards. The initial idea is to link each output pin such...

I am going to make a computer or at least attempt to using some CPU chips and breadboards. The initial idea is to link each output pin such as halt to a led light.And the address buses too and link the inputs to switches.It will be a very basic CPU unit. What are your thoughts on this? -- ----Android NewsGroup Reader---- http://usenet.sinaapp.com/

## What does it mean to convert frequency domain into rectangular form?

inHere: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also...

Here: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also said that: "The next step is to take the Inverse DFT to move the filter into the time domain. The quickest way to do this is to convert the frequency domain to rectangular form, and then use the Inverse FFT." What does it mean to convert the frequ...

## What does it mean to convert frequency domain into rectangular form?

inHere: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also...

Here: http://www.dspguide.com/ch17/1.htm A description on creating arbitrary magnitude response filter using iFFT is given. There it's also said that: "The next step is to take the Inverse DFT to move the filter into the time domain. The quickest way to do this is to convert the frequency domain to rectangular form, and then use the Inverse FFT." What does it mean to convert the frequ...

## selective fft

inwhich is the best fft method if want the spectrum only for a selective set of points, say only 10-20% of the points in the entire spectrum. amar

which is the best fft method if want the spectrum only for a selective set of points, say only 10-20% of the points in the entire spectrum. amar

## OT: Calculators

inI discovered this when solving one of those trivia questions. The question was to find out what 36 divided by 2.(3)+ 4 can't get the...

I discovered this when solving one of those trivia questions. The question was to find out what 36 divided by 2.(3)+ 4 can't get the division symbol on this PC. Correct answer should be to write this as 36/2 X 3 + 4 =58 a computer would interpret it thus. Type that into a calculator and you will get 58 if you type 36 divided by 2X(3) + 4 where it doesn't matter whether th...

## Signal to noise ratio calculation

inI have implemented RLS algorithm on TMSC6713 DSK.I am confused with calculation of signal to noise ratio. I have achieved snr by two different...

I have implemented RLS algorithm on TMSC6713 DSK.I am confused with calculation of signal to noise ratio. I have achieved snr by two different means and the results are different.Can any one help me finding the right one. All the samples are aligned and equalized Method 1: I gave speech+noise to the adaptive filter.The speech signal was having a long pause in between.So I recorded the ...

## Visibility of email addresses when posting in this group

inSo as a newcomer to this group (and this is one of the first Google groups where I'm posting) I've noticed that the posts that I and some others...

So as a newcomer to this group (and this is one of the first Google groups where I'm posting) I've noticed that the posts that I and some others make display my gmail address(es). My questions regarding this are: -Is there a privacy concern? Can my email addresses end up to spam bots from this site (or another Google group for that matter)? -Is there a way to hide the email? -Is there anyt...

## Techniques behind arbitrary response or "drawable" equalizers?

inI need to design a filter that has arbitrary response. Basically, I want to be able to almost "draw" the equalizer curve. What are the...

I need to design a filter that has arbitrary response. Basically, I want to be able to almost "draw" the equalizer curve. What are the techniques behind (FFT-based) arbitrary response or "drawable" equalizers such as: http://wiki.cockos.com/wiki/index.php/ReaFIR or http://www.elevayta.net/product4.htm

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