Reconstruct wavelet packet coefficients
X = wprcoef(T,N)
X = wprcoef(T)
X = wprcoef(T,0)
wprcoef is a one- or two-dimensional wavelet packet analysis function.
X = wprcoef(T,N) computes reconstructed coefficients of the node N of the wavelet packet tree T.
X = wprcoef(T) is equivalent to X = wprcoef(T,0).
% The current extension mode is zero-padding (see dwtmode) % Load signal. load noisdopp; x = noisdopp; figure(1); subplot(211); plot(x); title('Original signal'); % Decompose x at depth 3 with db1 wavelet packets % using Shannon entropy. t = wpdec(x,3,'db1','shannon'); % Plot wavelet packet tree. plot(t)
% Reconstruct packet (2,1). rcfs = wprcoef(t,[2 1]); figure(1); subplot(212); plot(rcfs); title('Reconstructed packet (2,1)');