Entropy-threshold method for best basis selection
The methods which were adapted for the best basis selection optimise the decomposition by minimising the criterion cost function. This usually does not produce optimal ratedistortion (RD) behaviour of the complete transform coder. This paper presents an extension of the well-known entropy-based best basis selection method titled entropy-threshold best basis selection. Using the threshold method, the criterion used in the original entropy-based method is strengthened and eliminates the portions of decomposition that are not cost effective. As the experiments illustrate, this new method exhibits great improvement in both RD performance and simplified decomposition complexity.
best basis wavelet packets entropy cost function decision threshold