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Set up json file

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This commit is contained in:
Aidan Sharpe 2024-04-26 17:50:44 -04:00
parent b2dd75319f
commit 3a4509f40a
1 changed files with 48 additions and 10 deletions
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52
6th-Semester-Spring-2024/DSP/Labs/FinalProject/adding_noise.py
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@ -5,11 +5,12 @@ from scipy.io import wavfile
import sounddevice as sd import sounddevice as sd
import random import random
from pesq import pesq from pesq import pesq
import json
SIGNAL_PATH = "speechfiles/sp01.wav" #SIGNAL_PATH = "speechfiles/sp01.wav"
NOISE_PATH = "noisefiles/white.dat" #NOISE_PATH = "noisefiles/white.dat"
# Scale the signal to the range [-1,1] # Scale the signal to the range [-1,1]
@ -64,16 +65,53 @@ def add_noise(signal, noise, snr):
def main(): def main():
signal_sample_rate, signal_data = load_audiofile(SIGNAL_PATH) noise_paths = ("noisefiles/white.dat", "noisefiles/train.dat", "noisefiles/street.dat", "noisefiles/exhibition.dat")
noise_sample_rate, noise_data = load_audiofile(NOISE_PATH)
# Compose signal paths for the 30 sentences
signal_paths = []
for i in range(1,30+1):
signal_paths.append(f"speechfiles/sp{i:02}.wav")
# SNR in dB
snrs = (0, 10, 20, 30)
pesqs = {"unfiltered": {}, "filtered": {}}
for snr in snrs:
pesqs["unfiltered"][snr] = {}
pesqs["filtered"][snr] = {}
for noise_path in noise_paths:
pesqs["filtered"][snr][noise_path[:-4]] = []
pesqs["unfiltered"][snr][noise_path[:-4]] = []
for signal_path in signal_paths:
noise_sample_rate, noise_data = load_audiofile(noise_path)
signal_sample_rate, signal_data = load_audiofile(signal_path)
assert signal_sample_rate == noise_sample_rate, "Signal and noise sampling rates didn't match." assert signal_sample_rate == noise_sample_rate, "Signal and noise sampling rates didn't match."
sample_rate = signal_sample_rate sample_rate = signal_sample_rate
noisy_signal = add_noise(signal_data, noise_data, 0) noisy_signal = add_noise(signal_data, noise_data, snr)
filtered_signal = scipy.signal.wiener(noisy_signal) filtered_signal = scipy.signal.wiener(noisy_signal)
print(pesq(sample_rate, signal_data, noisy_signal, mode='nb')) noisy_pesq = pesq(sample_rate, signal_data, noisy_signal, mode='nb')
print(pesq(sample_rate, signal_data, filtered_signal, mode='nb')) filtered_pesq = pesq(sample_rate, signal_data, filtered_signal, mode='nb')
pesqs["filtered"][snr][noise_path[:-4]].append(noisy_pesq)
pesqs["unfiltered"][snr][noise_path[:-4]].append(filtered_pesq)
pesqs_json = json.dumps(pesqs, indent=4)
with open("pesqs.json", "w") as outfile:
outfile.write(pesqs_json)
plt.plot(snrs, noisy_pesqs, label="PESQ Unfiltered")
plt.plot(snrs, filtered_pesqs, label="PESQ Filtered")
plt.xlabel("SNR [dB]")
plt.ylabel("PESQ")
plt.legend()
plt.show()
#sd.play(normalize_signal(noisy_signal), samplerate=sample_rate, blocking=True) #sd.play(normalize_signal(noisy_signal), samplerate=sample_rate, blocking=True)
#sd.play(normalize_signal(filtered_signal), samplerate=sample_rate, blocking=True) #sd.play(normalize_signal(filtered_signal), samplerate=sample_rate, blocking=True)