def test_logenergy_zero(self):
_configure_frame()
amps = [0] * 10
frames = frame.apply(Signal(amps, 5))
lenergies = shorttime.log_energy(frames)
all150 = all(lenergies == -156.53559774527022)
self.assertTrue(all150)
def zcr_nocrossing(self, amp):
_configure_frame()
signal = Signal([amp]*10, 5)
frames = frame.apply(signal)
zerocross = shorttime.zcr(frames, 5)
allzero = all(zerocross == 0)
return allzero
def test_zero_amps(self):
amps = [0] * 10
_configure_frame()
frames = frame.apply(Signal(amps, 5))
corrs, __ = shorttime.autocorr(frames)
is_allzero = all(corrs == 0)
self.assertTrue(is_allzero)
def test_ncross(self):
_configure_frame()
amps = np.array([3, 3, 3, -3, -4, -5, 10, 15, 12, -1])
fs = 5
frames = frame.apply(Signal(amps, fs))
reals = [0, 0.33, 0.33, 0.33, 0.33, 0.33, 0.33, 0.33]
zerocross = shorttime.zcr(frames, fs)
abs_err = np.abs(np.array(reals) - zerocross)
almost_equal = all(abs_err <= 0.01)
self.assertTrue(almost_equal)
def _make_frames(size, stride, signal=None):
conf.framing['size'] = size
conf.framing['stride'] = stride
signal = Signal(np.arange(-20, 20), 20) if signal is None else signal
return fr.apply(signal)
def get_frames(signal=None):
signal = signal01 if signal is None else signal
return frame.apply(signal)
def _make_simple_frames():
_configure_frame()
signal = _make_simple_signal()
return frame.apply(signal)
def test_zero_amps_norm(self):
amps = [0] * 10
_configure_frame()
frames = frame.apply(Signal(amps, 5))
corrs = shorttime.autocorr_norm(frames)
self.assertTrue(all(cor == 0 for cor in corrs))