BOT's based on nonuniform filter banks
نویسندگان
چکیده
منابع مشابه
New results and open problems on nonuniform filter-banks
Nonuniform lter-banks (FB's) have traditionally been built either by cascading uniform ones in a tree structure or by direct design methods that lead to near-perfect reconstruction. However many theoretical issues remain unresolved. This paper begins by pointing out a number of these issues , and summarizes the known conditions for existence of nonuniform perfect reconstruction (PR) FB's. As a ...
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A novel method for designing near-perfect reconstruction oversampled nonuniform cosine-modulated filter banks is proposed, which combines frequency warping and subband merging, and thus offers more flexibility than known techniques. On the one hand, desirable frequency partitionings can be better approximated. On the other hand, at the price of only a small loss in partitioning accuracy, both w...
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In this paper, uniform, critically decimated lter banks are used to approximate nonuniform lter banks wherein di erent lters have approximately the same magnitude response, but di erent phase, thus forming a linear periodically timevarying lter whose characteristics are similar to those of a nonuniform bank. This is done by post-processing a number of selected subbands of a uniform bank using a...
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متن کاملNonuniform Filter Banks: New Results and Open Problems
A nonuniform filter bank (FB) is one whose channel decimation rates need not all be equal. While the theory and design of uniform FBs is a very well developed subject, there are several interesting open issues in the area of nonuniform FBs. Most nonuniform FB designs either result in approximate or near–perfect reconstruction, or involve cascading uniform FBs in tree structures. This leaves una...
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ژورنال
عنوان ژورنال: IEEE Transactions on Signal Processing
سال: 1996
ISSN: 1053-587X
DOI: 10.1109/78.533718