def _preprocess(self, mixture, true):
with torch.no_grad():
mix_spec = self.stft_module.stft(mixture, pad=True)
mix_amp_spec = taF.complex_norm(mix_spec)
mix_amp_spec = mix_amp_spec[:, 1:, :]
mix_mag_spec = torch.log10(mix_amp_spec + self.eps)
#ex1
ex1_mix_spec = self.stft_module_ex1.stft(mixture, pad=True)
ex1_mix_amp_spec = taF.complex_norm(ex1_mix_spec)
ex1_mix_mag_spec = torch.log10(ex1_mix_amp_spec + self.eps)
ex1_mix_mag_spec = ex1_mix_mag_spec[:, 1:, 1:513]
#ex2
ex2_mix_spec = self.stft_module_ex2.stft(mixture, pad=True)
ex2_mix_amp_spec = taF.complex_norm(ex2_mix_spec)
ex2_mix_mag_spec = torch.log10(ex2_mix_amp_spec + self.eps)
ex2_mix_mag_spec = ex2_mix_mag_spec[:, 1:, :]
batch_size, f_size, t_size = ex2_mix_mag_spec.shape
pad_ex2_mix_mag_spec = torch.zeros((batch_size, f_size, 128),
dtype=self.dtype,
device=self.device)
pad_ex2_mix_mag_spec[:, :1024, :127] = ex2_mix_mag_spec[:, :, :]
return mix_mag_spec, ex1_mix_mag_spec, pad_ex2_mix_mag_spec, mix_spec
def _preprocess(self, noisy, clean):
with torch.no_grad():
noisy_spec = self.stft_module.stft(noisy, pad=False)
noisy_amp_spec = taF.complex_norm(noisy_spec)
noisy_mag_spec = self.stft_module.to_normalize_mag(noisy_amp_spec)
clean_spec = self.stft_module.stft(clean, pad=False)
clean_amp_spec = taF.complex_norm(clean_spec)
return noisy_mag_spec, clean_spec, noisy_spec, noisy_amp_spec, clean_amp_spec
def _preprocess(self, noisy):
with torch.no_grad():
noisy_spec = self.stft_module.stft(noisy, pad=False)
noisy_amp_spec = taF.complex_norm(noisy_spec)
noisy_mag_spec = self.stft_module.to_normalize_mag(noisy_amp_spec)
#ex2
ex2_noisy_spec = self.stft_module_ex2.stft(noisy, pad=False)
ex2_noisy_amp_spec = taF.complex_norm(ex2_noisy_spec)
ex2_noisy_mag_spec = self.stft_module_ex2.to_normalize_mag(ex2_noisy_amp_spec)
return noisy_mag_spec, ex2_noisy_mag_spec, noisy_spec
def _preprocess(self, mixture, true):
with torch.no_grad():
mix_spec = self.stft_module.stft(mixture, pad=True)
mix_amp_spec = taF.complex_norm(mix_spec)
mix_amp_spec = mix_amp_spec[:, 1:, :]
mix_mag_spec = torch.log10(mix_amp_spec + self.eps)
true_spec = self.stft_module.stft(true, pad=True)
true_amp_spec = taF.complex_norm(true_spec)
true_amp_spec = true_amp_spec[:, 1:, :]
return mix_mag_spec, true_amp_spec, mix_amp_spec
def train(self):
train_loss = np.array([])
valid_loss = np.array([])
print("start train")
for epoch in range(self.epoch_num):
# train
print('epoch{0}'.format(epoch))
start = time.time()
self.model.train()
tmp_train_loss, _, _, _, _ = self._run(
mode='train', data_loader=self.train_data_loader)
train_loss = np.append(train_loss,
tmp_train_loss.cpu().clone().numpy())
self.model.eval()
with torch.no_grad():
tmp_valid_loss, est_source, est_mask, noisy_amp_spec, clean_amp_spec = self._run(
mode='validation', data_loader=self.valid_data_loader)
valid_loss = np.append(valid_loss,
tmp_valid_loss.cpu().clone().numpy())
if (epoch + 1) % 10 == 0:
plot_time = time.time()
est_source = taF.complex_norm(est_source)
show_TF_domein_result(train_loss, valid_loss,
noisy_amp_spec[0, :, :],
est_mask[0, :, :], est_source[0, :, :],
clean_amp_spec[0, :, :])
print('plot_time:', time.time() - plot_time)
torch.save(self.model.state_dict(),
self.save_path + 'u_net{0}.ckpt'.format(epoch + 1))
end = time.time()
print('----excute time: {0}'.format(end - start))
def _preprocess(self, mixture, true_sources):
mix_spec = self.stft_module.stft(mixture, pad=True)
mix_phase = mix_spec[:,:,1]
mix_amp_spec = taF.complex_norm(mix_spec)
mix_amp_spec = mix_amp_spec[:,1:,:]
mix_mag_spec = torch.log10(mix_amp_spec + self.eps)
mix_mag_spec = mix_mag_spec[:,1:,:]
true_sources_spec = self.stft_module.stft_3D(true_sources, pad=True)
true_sources_amp_spec = taF.complex_norm(true_sources_spec)
true_sources_amp_spec = true_sources_amp_spec[:,:,1:,:]
true_res = mixture.unsqueeze(1).repeat(1, self.inst_num, 1) - true_sources
true_res_spec = self.stft_module.stft_3D(true_res, pad=True)
true_res_amp_spec = taF.complex_norm(true_res_spec)
return mix_mag_spec, true_sources_amp_spec, true_res_amp_spec, mix_phase, mix_amp_spec
def test_complex_norm(complex_tensor, power):
expected_norm_tensor = complex_tensor.pow(2).sum(-1).pow(power / 2)
norm_tensor = F.complex_norm(complex_tensor, power)
torch.testing.assert_allclose(norm_tensor,
expected_norm_tensor,
atol=1e-5,
rtol=1e-5)
def test_complex_norm(self, shape, power):
torch.random.manual_seed(42)
complex_tensor = torch.randn(*shape)
expected_norm_tensor = complex_tensor.pow(2).sum(-1).pow(power / 2)
norm_tensor = F.complex_norm(complex_tensor, power)
self.assertEqual(norm_tensor,
expected_norm_tensor,
atol=1e-5,
rtol=1e-5)
def forward(self, complex_tensor: Tensor) -> Tensor:
r"""
Args:
complex_tensor (Tensor): Tensor shape of `(..., complex=2)`.
Returns:
Tensor: norm of the input tensor, shape of `(..., )`.
"""
return F.complex_norm(complex_tensor, self.power)
def __call__(self, x):
x = x.stft(self.n_fft,
hop_length=self.hop_length,
win_length=self.win_length,
window=self.window,
pad_mode=self.pad_mode)
if self.normalized:
x /= self.window.pow(2).sum().sqrt()
return complex_norm(x, power=self.power)
def __call__(self, x):
self.window = self.window.to(dtype=x.dtype, device=x.device)
x = x.stft(self.n_fft,
hop_length=self.hop_length,
win_length=self.win_length,
window=self.window,
pad_mode=self.pad_mode)
if self.normalized:
x /= self.window.pow(2).sum().sqrt()
return complex_norm(x).pow(self.power)
def __call__(self, S):
self.window = self.window.to(dtype=S.dtype, device=S.device)
S = S.pow(1 / self.power)
if self.normalized:
S *= self.window.pow(2).sum().sqrt()
# randomly initialize the phase
angles = 2 * math.pi * torch.rand(*S.size())
angles = torch.stack([angles.cos(), angles.sin()],
dim=-1).to(dtype=S.dtype, device=S.device)
S = S.unsqueeze(-1).expand_as(angles)
# And initialize the previous iterate to 0
rebuilt = 0.
for i in range(self.n_iter):
print(f'Griffin-Lim iteration {i}/{self.n_iter}')
# Store the previous iterate
tprev = rebuilt
# Invert with our current estimate of the phases
inverse = istft(S * angles,
n_fft=self.n_fft,
hop_length=self.hop_length,
win_length=self.win_length,
window=self.window,
length=self.length).float()
# Rebuild the spectrogram
rebuilt = inverse.stft(n_fft=self.n_fft,
hop_length=self.hop_length,
win_length=self.win_length,
window=self.window,
pad_mode=self.pad_mode)
# Update our phase estimates
angles = rebuilt.sub(self.momentum).mul_(tprev)
angles = angles.div_(
complex_norm(angles).add_(1e-16).unsqueeze(-1).expand_as(
angles))
# Return the final phase estimates
return istft(S * angles,
n_fft=self.n_fft,
hop_length=self.hop_length,
win_length=self.win_length,
window=self.window,
length=self.length)
def forward(self, x):
"""
Input: (batch_size, nb_channels, nb_timesteps)
Output:() # TODO: find appropriate output
"""
X = self.transform(x).transpose(-3, -2)
A, phi = F.complex_norm(X), F.angle(X)
phase_features = self.compute_features(phi)
A_hat = self.estimator(A, phase_features)
phase = torch.stack((torch.cos(phi), torch.sin(phi)), dim=-1)
Y_hat = A_hat.unsqueeze(-1) * phase
return Y_hat.transpose(-3, -2)
def func(tensor):
power = 2.
return F.complex_norm(tensor, power)
def test_complex_norm(complex_tensor, power):
expected_norm_tensor = complex_tensor.pow(2).sum(-1).pow(power / 2)
norm_tensor = F.complex_norm(complex_tensor, power)
assert torch.allclose(expected_norm_tensor, norm_tensor, atol=1e-5)
#
# ``torchaudio`` implements ``TimeStrech``, ``TimeMasking`` and
# ``FrequencyMasking``.
#
######################################################################
# TimeStrech
# ~~~~~~~~~~
#
spec = get_spectrogram(power=None)
strech = T.TimeStretch()
rate = 1.2
spec_ = strech(spec, rate)
plot_spectrogram(F.complex_norm(spec_[0]),
title=f"Stretched x{rate}",
aspect='equal',
xmax=304)
plot_spectrogram(F.complex_norm(spec[0]),
title="Original",
aspect='equal',
xmax=304)
rate = 0.9
spec_ = strech(spec, rate)
plot_spectrogram(F.complex_norm(spec_[0]),
title=f"Stretched x{rate}",
aspect='equal',
xmax=304)