Simple wavelet compression transform the principle of work is as follows: Signals and signal derivation, formed for the same signal sequence and signal sequence derivation of the length of the input signal are half the length. If the input signal sequence is A = (a (1 ),..., a (n)) for the same signal S = (s (1 ),..., s (n/2)) and the difference signal D = (d (1 ),..., d (n/2)) method for calculating as follows: for i = 1 ,..., n/2 s (i) = a (2* i-1)+ a (2* i) d (i) = a (2* i-1)-a (2* i) For example, the input signal is: 5,2,3,2,5,7,9,6 Seek to derive the signal and difference signal and for the same signals are: s = (7,5,12,15) d = (3,1,-2,3) Will seek the same combination of signals and difference, the original signal is transformed into: A = (7,5,12,15,3,1,-2,3) The same process again on the current signal A of the first half of the operation, until the length of the input signal is 1, change the course of The End. Also used the above exampl

小波变换.txt

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