wavelet packet decomposition..
in [Matlab]
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From: mahmud_dbm on 12 Feb 2010 13:01 but i need this packet decomposition, which should give us a transformed signal... its here http://en.wikipedia.org/wiki/Wavelet_packet_decomposition as i've seen your earlier comments, you can figure it out.
From: Wayne King on 12 Feb 2010 13:18 "mahmud_dbm " <mahmud_dbm(a)yahoo.com> wrote in message <hl450u$fja$1(a)fred.mathworks.com>... > but i need this packet decomposition, which should give us a transformed signal... > its here > http://en.wikipedia.org/wiki/Wavelet_packet_decomposition > as i've seen your earlier comments, you can figure it out. Hi, I answered you in your other post. Wayne
From: mahmud_dbm on 12 Feb 2010 23:00 Okay Sir thank you a lot... suppose i am having a binary sequence, now what i basically want is to decompose this so that i get a transformed signal as it happens here.. http://en.wikipedia.org/wiki/Wavelet_packet_decomposition then at the receiver side, i will do the opposite to reconstruct the binary sequence back. I'm trying, what happens i'll let you know. .. but your comments helped a lot, actually i'm new in this wavelet domain, and its a bit tough to visualize signals in this domain than in Time Domain or Frequency Domain.
From: Wayne King on 13 Feb 2010 07:50 "mahmud_dbm " <mahmud_dbm(a)yahoo.com> wrote in message <hl584l$dpa$1(a)fred.mathworks.com>... > Okay Sir thank you a lot... > > suppose i am having a binary sequence, now what i basically want is to decompose this so that i get a transformed signal as it happens here.. > http://en.wikipedia.org/wiki/Wavelet_packet_decomposition > > then at the receiver side, i will do the opposite to reconstruct the binary sequence back. I'm trying, what happens i'll let you know. .. > > but your comments helped a lot, actually i'm new in this wavelet domain, and its a bit tough to visualize signals in this domain than in Time Domain or Frequency Domain. Hi, that figure you keep posting from Wikipedia is exactly what the wavelet packet transform does in MATLAB. The Wikipedia figure is just displaying the WP tree on its side, while MATLAB plots it vertically. That is all. Wayne
From: mahmud_dbm on 14 Feb 2010 09:28 Really Thank You Sir, at least now i am sure that i am not doing anything wrong.. :)) But Sir My Problem is, very very simple, say i am having a sequence of 100 bits, after decomposing i need to have a sequence of 100 samples, say 'haar' i'm talking about. how do i get that decomposed "Sequence", not Tree.. i don't need tree.... :(( i got what u said me that wpdec is doing the same thing, okay thats great.. but how to reconstruct the whole sequence ... say 100 coefficient for 100 input bits.. not just a single coefficient for a particular Node. when i'd written the program for "wavelet packet decomposition" manually, i used 2 get direct decomposed coefficients sequence... say 100 co-effs for 100 input bits.. sir u do one thing for me, take 100 binary bits, decompose it, get 100 coefficients (not Tree Node), then reconstruct the same 100 bits from co-effs, (not from Tree) Sorry sir i know i'm disturbing you, but these tree stuffs freaking me out.. .. .. :((
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