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Low-power DWT filter bank design using comb filter and fourth-order polynomial  

Jang Young-Beom (Dept. of Information and Telecommunication, Sangmyung University)
Lee Won-Sang (Dept. of Computer, Information, and Telecommunication, Sangmyung University)
Publication Information
Journal of the Institute of Electronics Engineers of Korea SP / v.42, no.1, 2005 , pp. 87-94 More about this Journal
Abstract
In this paper a low-power DWT(Discrete Wavelet Transform) design technique is proposed. As basic low-pass filter for analysis bank, comb filter is utilized, and in order to improve frequency response for the comb filter, a fourth order polynomial is also proposed. Another filters are designed by using perfect reconstruction conditions. The lowpass filter coefficients of the analysis filter bank are optimized based on the cost function and perfect reconstruction condition. The number of the multiplications and MSE(Mean Squared Error) performance of the proposed DWT filter bank are compared with those of the JPEG2000 (9, 7) filter bank. It is shown that number of multiplications of the proposed filter bank are saved with 33.3%, and MSE values of the proposed filter bank are also superior to those of the JPEG2000 (9, 7) filter bank.
Keywords
DWT(Discrete Wavelet Transform); filter banks; comb filters; fourth-order polynomial;
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