The simplest wavelet basis is the H

The simplest wavelet basis is the Haar wavelet [25], which operatesbycalculatingaveragesanddifferencesforeachpairof coefficients, with the process continuing recursively on the output of each step. The total number of steps involved is log2(c), where c refers to the number of coefficients in the signal. An example of the process is given in Table 1. After decomposition, the original signal can be represented as a combination of one average coefficient and all the detail coefficients—in the example given, the signal becomes