## Forums Search for: Resampling

## Real Time Interpolation/Resampling

inHi, I have a motion control system comprising a realtime component and a non-realtime component. Simple 2D data (position/time) is being...

Hi, I have a motion control system comprising a realtime component and a non-realtime component. Simple 2D data (position/time) is being streamed from the non-realtime area into a FIFO queue in the realtime area. I have a few things that I'm hoping someone could help me with: The realtime component needs to keep running at all cost. Thus, when data is delayed, my buffer is in danger of runni...

## Interpolation matrix

inI'm trying to define a couple of common signal interpolation/ resampling methods as a matrix operation, i.e. y = W z where, y is the...

I'm trying to define a couple of common signal interpolation/ resampling methods as a matrix operation, i.e. y = W z where, y is the interpolated data vector of dimension m x 1 W is the interpolation matrix of dimension m x l z is the original data vector of dimension l x 1 I've worked out W for linear and nearest neighbour interpolation (easy) and I was wondering if more c...

## Resampling in stages?

inIs there a reason (founded in DSP theory) to resample in stages instead of going directly from one sample rate to another? If so what is the...

Is there a reason (founded in DSP theory) to resample in stages instead of going directly from one sample rate to another? If so what is the reason? And where can I read about it? For example: When I resample from 8kHz to 48kHz the resulting audio sounds worse compared to the audio I get if I resample in stages from 8kHz to 24kHz to 48kHz. Thanks

## Live audio resampling problem!

I am trying to decode audio streams sent from an arm board, unfortunely the clock on the arm board can vary from time to time, as a result the...

I am trying to decode audio streams sent from an arm board, unfortunely the clock on the arm board can vary from time to time, as a result the wave sample rate varies. To keep high audio quality, the delay must be kept constant. Can anyone give me some advice? Do I have to design a resample algorithm whose conversion rate can be changed from time to time?

## Resampling of irregularly sampled data in 3 dimensions using a convolution kernel (Lanczos)

inHello, I have irregular spaced samples in 3 dimensions: f(xi, yi, zi) that I wish to take the FFT of. Therefore I need to resample the data to...

Hello, I have irregular spaced samples in 3 dimensions: f(xi, yi, zi) that I wish to take the FFT of. Therefore I need to resample the data to a regular grid. Since the data will be Fourier transformed; it will also be good to smooth the data somewhat to avoid Gibbs noise ("ringing")? Therefore I am considering using a convolution kernel to resample the data to a regular grid. A convolutio...

## Resampling by multistage decimation (Richard Lyons book)

inHello everybody, I am trying to understand the multistage decimation problem stated by Richard Lyons in his book "understanding digital signal...

Hello everybody, I am trying to understand the multistage decimation problem stated by Richard Lyons in his book "understanding digital signal processing" 1st edition, page 306. It is as follows: - We have an input data arriving at 400 kHz and we want to decimate by 100, but we are going to do this in two stage: 50 and 2. - The original signal bandwidth is something greater than 100 kHz, ...

## some suggestions on my octave-band spectrogram analysis in fixed point DSP implementation

ini am designing one 1/3 octave band spectrogram analysis I use multirate filter bank to realize that spectrogram. It goes this way 1) first,...

i am designing one 1/3 octave band spectrogram analysis I use multirate filter bank to realize that spectrogram. It goes this way 1) first, from the biggest frequency value, I use three IIR bandpass filter, then calculate the std value. 2) Then decimate the input by 2 through(one 30 order FIR filter, then resampling the input), then use the same three coffeicents to calculate the succ...

## streaming resampled buffers seamlessly

inHi guys, this problem is driving me nuts over here. I'm working on a streaming resampling method that resamples buffers in sequence, when...

Hi guys, this problem is driving me nuts over here. I'm working on a streaming resampling method that resamples buffers in sequence, when i reach the end of an input buffer i zeropad it (enough for the anti-alisaing filter), generate the output buffer, and i'm done. the problem is that those last zero-samples at the end of my input buffer skew the last two samples of my output buffe...

## Video Port Capture. Interesting Questions.

Dear All, I have some questions about the video Port: As described in "spru629" the video Port is capable among others of acquiring frames,...

Dear All, I have some questions about the video Port: As described in "spru629" the video Port is capable among others of acquiring frames, perform scaling and chrominance resampling. In the configurations of the video port, the threshold to perform a DMA transfer for the chrominance components is automatically defined as half of the threshold defined for the luminance component. My...

## Setting sampling rate of Tektronix VSA? Resampling non-integer rates?

inHi, Is anyone using equipment like a VSA for data capture? Any idea how I can set the sampling rate in a Tektronix RSA? Whatever I set (e.g....

Hi, Is anyone using equipment like a VSA for data capture? Any idea how I can set the sampling rate in a Tektronix RSA? Whatever I set (e.g. using SENSe:ACQuisition:BANDwidth or SENSe:IQVTime:FREQuency:SPAN), the sampling rate is always 150 MHz! Frustrating... With an Agilent MSG I am transmitting an LTE signal which is sampled at 30.72MHz and to be received by the Tektronix VSA. (But ...

## Sampling frequency offset correction (resampling) - help needed

inhi, Can someone explain how I can compensate for sampling clock frequency offset (SCO) using fractional-delay interpolation? In OFDM...

hi, Can someone explain how I can compensate for sampling clock frequency offset (SCO) using fractional-delay interpolation? In OFDM basebnad receiver design book they said that you can use fractional-delay interpolation filter to compensate SCO but of course they forgot to write about. Let's say I have a ramp signal (it will be easier for me to explain what my doubts are as it has amplitude...

## Resampling vector from the middle sample (Keeping the symmetry)

inHi All, I would like to re-sample a vector using different sample rates. But I would want to keep the symmetry as it is. E.g. h = [ 0.1 0.3...

Hi All, I would like to re-sample a vector using different sample rates. But I would want to keep the symmetry as it is. E.g. h = [ 0.1 0.3 0.7 0.3 0.1]; % Original vector with 5 samples h2 = resample(h,4,5); % Re-sampled vector into 4 samples But the above command doesn't give a symmetric vector as the original one. Is there any way to re-sample keeping the symmetry around the center ...

## multirate resampling implementation

inHi , I'm new to multirate filters. I am trying to implement an interp by 3 and decim by 5 multirate filter. Lets say i have 40 taps...

Hi , I'm new to multirate filters. I am trying to implement an interp by 3 and decim by 5 multirate filter. Lets say i have 40 taps in the filter. I have 5 sub-filters with 8 taps each. In the 1st clock cycle i input 2 samples to sub-filters 1 and 4 In the 2nd clock cycle i input 2 new samples to sub-filters 2 and 5 In the 3 clock cycle i input 1 new sample to sub-filters 3...