The orthogonal wavelet transform separate a signal into low frequency component and high frequency component. The first is called smooth coefficients, the second part is called wavelet coefficients. The smooth coefficients is separated into two parts again and again. If the wavelet coefficients is also done like this, we called it the wavelet packet transform.

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Algorithm of wavelet packet

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Raw signal and wavelet packet coefficients

Orthogonal Wavelet Transform(Haar) |