Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan

Ministry of Higher Education, Science and Innovation of the Republic of Uzbekistan

Tashkent University of Information Technologies named after Muhammad al-Khorazmi
Assignment 3

Done by: Shobotayev Javlonbek
Received: Xoldorov .Sh.

Tashkent – 2023
Pycharm muhitida signallarga raqamli ishlov berish
Berilgan funktsiyalardan variant tanlanib, olingan variantlar ustida quyidagi amallar bajariladi:

1. 
   Funksiya uchun Hara o’zgartirishi
   

2. Nutq signali uchun Hara o’zgartirishi

10.

Shobo‘tayev Javlonbek Bahodir o‘g‘li 424-21

Berilgan funksiya

import numpy as np
import matplotlib.pyplot as plt

# Funksiya

def funksiya(x):
return (x**2 + 1)**np.cos(x)

# Berilgan interval va delta x

x_interval = np.arange(0, 1.01, 0.01)
x_tasvir = np.arange(0, 6.28, 3.14/16)

# Funksiyani hisoblash

y_interval = funksiya(x_interval)
y_tasvir = funksiya(x_tasvir)

# Natijalarni bitta grafikda chiqarish

plt.figure(figsize=(10, 5))

plt.plot(x_interval, y_interval, label='Interval [0, 1]')

plt.plot(x_tasvir, y_tasvir, label='Interval [0, 6.28]')

plt.title('Funksiyaning o\'zgarishi')

plt.xlabel('x')
plt.ylabel('y')
plt.legend()

plt.show()

Berilgan funksiyani o’zgartirish dasturi.

O’zgartirilgandan keyingi grafik tasvir.
Ovozli signalga hara o’zgartirishikiritish

import numpy as np

import matplotlib.pyplot as plt
from scipy.io import wavfile
from scipy.signal import spectrogram

# Funksiyalar

def tasvirlash(signal, fs, label):
time = np.arange(0, len(signal)) / fs
plt.plot(time, signal, label=label)

def audio_spektri(signal, fs, label):

f, t, Sxx = spectrogram(signal, fs)
plt.pcolormesh(t, f, 10 * np.log10(Sxx), label=label)

def amplitudagram(signal, fs, label):

time = np.arange(0, len(signal)) / fs
plt.plot(time, np.abs(signal), label=label)

# Ovozni o'qish

fs, signal = wavfile.read("javlonbek.wav")

# O'zgarmagan holatni tasvirlash

plt.figure(figsize=(15, 5))

plt.subplot(131)

tasvirlash(signal, fs, 'O\'zgarmagan holat')
plt.title('O\'zgarmagan holat')
plt.xlabel('Vaqt (s)')
plt.ylabel('Amplituda')
plt.legend()

plt.subplot(132)

audio_spektri(signal, fs, 'O\'zgarmagan holat')
plt.title('O\'zgarmagan holatning audio spektri')
plt.xlabel('Vaqt (s)')
plt.ylabel('Frekans (Hz)')
plt.legend()

plt.subplot(133)

amplitudagram(signal, fs, 'O\'zgarmagan holat')
plt.title('O\'zgarmagan holatning amplitudagrami')
plt.xlabel('Vaqt (s)')
plt.ylabel('Amplituda')
plt.legend()

plt.tight_layout()

plt.show()

# Ovozni o'zgartirish

# Masalan, ovozni balansini o'zgartirish
signal_changed = signal * 2

# O'zgarmagan holatni tasvirlash

plt.figure(figsize=(15, 5))

plt.subplot(131)

tasvirlash(signal_changed, fs, 'O\'zgarilgan holat')
plt.title('O\'zgarilgan holat')
plt.xlabel('Vaqt (s)')
plt.ylabel('Amplituda')
plt.legend()

plt.subplot(132)

audio_spektri(signal_changed, fs, 'O\'zgarilgan holat')
plt.title('O\'zgarilgan holatning audio spektri')
plt.xlabel('Vaqt (s)')
plt.ylabel('Frekans (Hz)')
plt.legend()

plt.subplot(133)

amplitudagram(signal_changed, fs, 'O\'zgarilgan holat')
plt.title('O\'zgarilgan holatning amplitudagrami')
plt.xlabel('Vaqt (s)')
plt.ylabel('Amplituda')
plt.legend()

plt.tight_layout()

plt.show()
ma’lum ovozli habarga o’zgartiriw kiritish dastur kodi.



Ovozli habar(wav formatida).
O’zgartirish kiritishdan avvalgi holat.

O’zgartirish kiritilganidan keyingi holat.