The recursive pyramid algorithm for the discrete wavelet transform |
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| Authors: | Vishwanath M |
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| Affiliation: | Dept. of Comput. Sci., Pennsylvania State Univ., University Park, PA; |
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| Abstract: | The recursive pyramid algorithm (RPA) is a reformulation of the classical pyramid algorithm (PA) for computing the discrete wavelet transform (DWT). The RPA computes the N-point DWT in real time (running DWT) using just L(log N-1) words of storage, as compared with O(N) words required by the PA. L is the length of the wavelet filter. The RPA is combined with the short-length FIR filter algorithms to reduce the number of multiplications and additions |
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