def init(self):
self.channels = 2
self.channel = self.kwargs['channel']
self.packetSource = self.kwargs['packetSource']
cutoff = self.channel.Fc + self.channel.Fs/self.channel.upsample_factor
self.hp = [iir.highpass(cutoff/self.channel.Fs, continuous=True, dtype=np.float64) for i in range(2)]
super(ContinuousTransmitter, self).init()
def init(self):
self.channels = 2
self.i = 0
cutoff = Fc - Fs / upsample_factor
self.hp = [
iir.highpass(cutoff / Fs, continuous=True, dtype=np.float64)
for i in range(2)
]
super(ContinuousTransmitter, self).init()
def init(self):
self.channels = 2
self.channel = self.kwargs['channel']
self.packetSource = self.kwargs['packetSource']
cutoff = self.channel.Fc + self.channel.Fs / self.channel.upsample_factor
self.hp = [
iir.highpass(cutoff / self.channel.Fs,
continuous=True,
dtype=np.float64) for i in range(2)
]
super(ContinuousTransmitter, self).init()
def prepareMaskNoise(fn, Fs, Fc, upsample_factor):
f = wave.open(fn)
nframes = f.getnframes()
dtype = [None, np.uint8, np.int16, None, np.int32][f.getsampwidth()]
frames = np.fromstring(f.readframes(nframes), dtype).astype(float)
frames = frames.reshape(nframes, f.getnchannels())
frames = frames.mean(1)
frames = util.upsample(frames, Fs / f.getframerate())
frames /= np.amax(np.abs(frames))
# band-stop filter for data
frames *= np.exp(-1j * 2 * np.pi * np.arange(frames.size) * Fc / Fs)
frames = iir.highpass(.8 / upsample_factor)(frames)
frames *= np.exp(2j * 2 * np.pi * np.arange(frames.size) * Fc / Fs)
frames = iir.highpass(.8 / upsample_factor)(frames)
frames *= np.exp(-1j * 2 * np.pi * np.arange(frames.size) * Fc / Fs)
frames = frames.real
# look for beginning and end of noise
envelope = iir.lowpass(.01)(np.r_[np.zeros(6), np.abs(frames)])[6:]
start = np.where(envelope > np.amax(envelope) * .01)[0][0]
end = np.where(envelope > np.amax(envelope) * 1e-3)[0][-1]
return frames[start:end]
def prepareMaskNoise(fn, Fs, Fc, upsample_factor):
f = wave.open(fn)
nframes = f.getnframes()
dtype = [None, np.uint8, np.int16, None, np.int32][f.getsampwidth()]
frames = np.fromstring(f.readframes(nframes), dtype).astype(float)
frames = frames.reshape(nframes, f.getnchannels())
frames = frames.mean(1)
frames = util.upsample(frames, Fs/f.getframerate())
frames /= np.amax(np.abs(frames))
# band-stop filter for data
frames *= np.exp(-1j * 2 * np.pi * np.arange(frames.size) * Fc / Fs)
frames = iir.highpass(.8/upsample_factor)(frames)
frames *= np.exp(2j * 2 * np.pi * np.arange(frames.size) * Fc / Fs)
frames = iir.highpass(.8/upsample_factor)(frames)
frames *= np.exp(-1j * 2 * np.pi * np.arange(frames.size) * Fc / Fs)
frames = frames.real
# look for beginning and end of noise
envelope = iir.lowpass(.01)(np.r_[np.zeros(6), np.abs(frames)])[6:]
start = np.where(envelope > np.amax(envelope)*.01)[0][0]
end = np.where(envelope > np.amax(envelope)*1e-3)[0][-1]
return frames[start:end]
def init(self):
self.channels = 2
self.i = 0
cutoff = Fc - Fs/upsample_factor
self.hp = [iir.highpass(cutoff/Fs, continuous=True, dtype=np.float64) for i in range(2)]
super(ContinuousTransmitter, self).init()
