Controlling Distortions in Maximally Decimated Filter Banks
نویسندگان
چکیده
The M-channel maximally decimated lter bank is considered, where, except in the ideal case of perfect reconstruction, aliasing distortion, magnitude distortion, and phase distortion are present. It is shown how these can be controlled if the lter bank is designed by the method of 1] that optimizes the gain of an error system.
منابع مشابه
LINEAR PHASE COSINE MODULATED MAXIMALLY DECIMATED FILTER BANKS WITH PERFECT RECONSTRUCTION t
In this paper a new type of maximally decimated FIR cosine modulated filter banks is proposed. Each analysis and synthesis filter in this filter bank has linear phase. We can design the system to have approximate reconstruction property (pseudoQMF system) or perfect reconstruction property (PR system). The filter bank is paraunitary in the PR case. Although there are 2M channels in the new syst...
متن کاملJohnston Filters and Optimal SNR in Maximally Decimated Filter Banks
In the design of maximally decimated lter banks, conventional practice is to use Johnston lters at both the analysis and synthesis ends. This paper proposes a two-step procedure: First, select suitable Johnston lters for the analysis side for good coding of the input; then design the synthesis lters to optimize the signal to reconstructed noise ratio SNR. A detailed example shows that one can d...
متن کاملDynamic Channelization Model Based on Non- maximally Decimated Filter Bank
A model is proposed, called dynamic channelization model based on non-maximally decimated filter bank, to solve the uncertainty and time-varying nature of subband signals’ number, bandwidth and location distribution. The structure divided the receiving signal into several sub bands evenly based on signal reconstruction theory. We input the adjacent subbands signals which belongs to the same cha...
متن کاملNew S’ubband Geometries for Image Texturie Segmentation
The usefulness of multichannel filtering for image texture segmentation has been demonstrated in the literature [l, 2, 3 , 4, 5, 61. Based on psychophysical studies, it has been largely believed that Gabor filters are optimal for segmentation [7, 81. In this paper, the application of maximally decimated, non-separable, perfect reconstruction filter banks (subband systems) are investigated for t...
متن کاملReport on US ARMY AWARD DAAD19-00-1-0534 Optimal Subband Coders for Cyclostationary Signals
We consider optimal orthonormal filter banks for subband coding of wide sense cyclostationary signals, with -periodic second order statistics. An -channel over decimated uniform filter bank, with -periodic analysis and synthesis filters, is used as the subband coder. An average variance condition is used to measure the output distortion. We show that for at least three potential bit allocation ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1997