#! /usr/bin/env python # -*- coding: utf-8 -*- # vim:fenc=utf-8 # # Copyright © 2015 jaidev <jaidev@newton> # # Distributed under terms of the MIT license. """ Examples from section 3.1.4 of the tutorial. """ import numpy as np import matplotlib.pyplot as plt from tftb.generators import atoms from scipy.signal import hamming from tftb.processing.linear import ShortTimeFourierTransform coords = np.array([[45, .25, 32, 1], [85, .25, 32, 1]]) sig = atoms(128, coords) x = np.real(sig) window = hamming(17) stft = ShortTimeFourierTransform(sig, n_fbins=128, fwindow=window) stft.run() stft.plot(show_tf=True, cmap=plt.cm.gray)
#! /usr/bin/env python # -*- coding: utf-8 -*- # vim:fenc=utf-8 # # Copyright © 2015 jaidev <jaidev@newton> # # Distributed under terms of the MIT license. """ Example from section 3.1.4 of the tutorial. """ import numpy as np from tftb.processing.linear import ShortTimeFourierTransform from tftb.generators import fmlin, amgauss from matplotlib.pyplot import cm x = np.real(amgauss(128) * fmlin(128)[0]) window = np.array([1]) stft = ShortTimeFourierTransform(x, n_fbins=128, fwindow=window) tfr, _, _ = stft.run() stft.plot(show_tf=True, cmap=cm.gray)
from tftb.processing.linear import ShortTimeFourierTransform from tftb.generators import fmconst import numpy as np sig = np.r_[fmconst(128, 0.2)[0], fmconst(128, 0.4)[0]] tfr = ShortTimeFourierTransform(sig) tfr.run() tfr.plot()
