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What is DCT and FFT in Signal Processing about?

The document introduces the Fourier transform and discrete time Fourier transform. It discusses how the Fourier transform represents a non-periodic signal as a sum of complex exponentials, with the frequency variable becoming continuous. The discrete time Fourier transform represents a sampled continuous signal as a sum of complex exponentials with discrete frequency variables, replacing the integral with a sum over all samples. The inverse discrete time Fourier transform reconstructs the original discrete

Author

Sri Nivas

Language

EN