Wavelet Pack Decomposition - Is there a faster way?

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John
John le 13 Mar 2013
I have to do multi-level wavelet decomposition.
I've tried using dwt and calling it recursively. I've also tried using wpdec which returns a tree and then I would extract the coefficients but this takes forever.
Any suggestions?

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Wayne King
Wayne King le 13 Mar 2013
Do you want wavelet packet or wavelet? You say multi-level wavelet and then you say wavelet packet.
If you want wavelet packet, why do you say that wpdec() takes forever.
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John
John le 13 Mar 2013
Sorry, I meant wavelet packet. I need successive wavelet transforms of both the detail and approximation coefficients. wpdec takes a while because of the efficiency I am looking for in my algorithm. I need it to be faster.
How can I get the DWT matrix for a N = 8192 sample signal?

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