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WignerVillerDistriubtion crashes for different signal lenghts

3

Hello, This crashes: import tftb import numpy as np signal = np.zeros(13) wvd = tftb.processing.WignerVilleDistribution(signal) wvd.run() and gives: Traceback (most recent call last): File "", line 3, in File "/Users/[...]/opt/anaconda3/envs/tftb/lib/python3.8/site-packages/tftb/processing/cohen.py",...

chapochn

Wigner Ville Memory Error

2

I am trying to compute the Wigner Ville Distribution for short audio clips. While it works correctly with small premade signals, the situation changes for wav files. The kernel crashes...

amChristonasis

High level documentation

1

- [ ] Scope of the toolbox - [ ] Real world examples - [ ] Expose toolbox as generators and processing utilities

jaidevd

Use SciPy's STFT

3

Since v0.19.0, scipy supports an STFT function: https://docs.scipy.org/doc/scipy/reference/generated/scipy.signal.stft.html [`tftb.processing.linear.ShortTimeFourierTransform`](https://github.com/scikit-signal/pytftb/blob/master/tftb/processing/linear.py#L18) should only be a wrapper around this.

jaidevd

Plot results separately

4

Hi @jaidevd, amazing package, thanks very much! _I might find the answer by locating in the code, but if you could answer that would speed it up:_ I was wondering...

andrisecker

Function parameters like `time_samples` and `timestamps` are used in multiple places varyingly, but they mean the same thing. Secondly, many distributions don't accept sampling frequency as an input. This needs...

jaidevd

Reassigned spectrogram for an audio signal

6

Congrats for this library! I'd like to plot the *reassigned* spectrogram of an audio frequency sweep (from 100hz to 20khz), available for download [here as a WAV file](http://gget.it/mszwo/sweep.wav). ``` from...

josephernest

how do I fftshift my complex spectrogram?

1

I'm looking at complex-valued radio signals caught from my SDR and normally process spectrograms in their human-understandable (fftshift'd) form. Here's what scipy produces:  and, here's what I get with...

rcox771

can function 'smoothed_pseudo_wigner_ville' be rewritten based on class WignerVilleDistribution or PseudoWignerVilleDistribution?

1

function **smoothed_pseudo_wigner_ville costs high computation** compared with WignerVilleDistribution or PseudoWignerVilleDistribution, i'm wondering smoothed_pseudo_wigner_ville be rewritten based on the basic class.

wangwuqi

Possible optimisation for processing.Scalogram ?

1

Hi, I'm not quite sure this is the right place to notify that but here I go. I've been using the Scalogram method recently and noticed two possible improvements that...

vldv