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- Note2026.08Fourier & DCT: From Frequency to Energy Compaction
From Fourier series to the DCT's energy-compaction property — why a DCT makes a smooth signal's energy pile up onto a handful of low-frequency coefficients.
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From Fourier series to the DCT's energy-compaction property — why a DCT makes a smooth signal's energy pile up onto a handful of low-frequency coefficients.