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Elements of Signal Theory
Discretization and Quantization of Signals
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algorithms analogue average basis functions binary calculation characteristics coefficients considered continuous signal convenient convolution coordinates correction correlation function corresponding defined described devices digital filter digital processing digital signal discrete Fourier transform discrete representation discrete signal distortion distribution domain equal example fast algorithms fragment frequency response frequency transfer function Gaussian Gray code Haar functions Haar transform Hadamard Hadamard transform histogram imaging systems impulse response initial picture interpolation inverse linear filter linear transformation matrix measured methods modes multiplication noise nonlinear number of operations number of samples object observed picture obtain one-dimensional optimal filter orthogonal output parameters photograph picture elements picture processing power spectrum problem processors quantization error quantization interval Rademacher functions random raster recursive restoration result SDFT sequence shift-invariant signal samples signal space spatial frequencies spectra statistical Table tion trans two-dimensional usually vector video signal values visual Walsh functions Walsh transform zero