Discrete Cosine Transform

1. 
   Discrete Cosine Transform
   

The discrete cosine transform (DCT) is closely related to the discrete Fourier transform. You can often reconstruct a sequence very accurately from only a few DCT coefficients. This property is useful for applications requiring data reduction.

Discrete cosine transformation (dct) – Diskret kosinus almashtirish

Amplituda vaqt -> Amplituda chastota

Y = dct(data5)

Plot(y)

Spectrum(y)

Fs = 1000

Pspectrum(y,Fs) (Spektr algoritmi -> Quvvat spektri)

Figure 1. Original signal graph and signal graph transformed by discret cosine transform



Figure 2. Power Spectrum, Periodogram Power Spectral Density and Welch Power Spectral Density Estimate graphs

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