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A New Factorization Technique for the Generalizad Linear-Phase LOT and Its Fast Implementation
A New Factorization Technique for the Generalizad Linear-Phase LOT and Its Fast Implementation
Muramatsu, Shogo
Kiya, Hitoshi
copyright©1996 IEICE
multirate filter banks
paraunitary system
linear-phase filter
subband image coding
In this work, a new structure of M-channel linear-phase paraunitary filter banks is proposed, where M is even. Our proposed structure can be regarded as a modification of the conventional generalized linear-phase lapped orthogonal transforms (GenLOT) based on the discrete cosine transform (DCT). The main purpose of this work is to overcome the limitation of the conventional DCT-based GenLOT, and improve the performance of the fast implementation. It is shown that our proposed fast GenLOT is superior to that of the conventional technique in terms of the coding gain. This work also provides a recursive initialization design procedure so as to avoid insignificant local-minimum solutions in the non-linear optimization processes. In order to verify the significance of our proposed method, several design examples are given. Furthermore, it is shown that the fast implementation can be used to construct M-band linear-phase orthonormal wavelets with regularity.
The Institute of Electronics, Information and Communication Engineers
1996-08
eng
journal article
http://hdl.handle.net/10191/6539
https://niigata-u.repo.nii.ac.jp/records/1911
http://www.ieice.org/jpn/trans_online/
AA10826239
09168508
IEICE transactions on fundamentals of electronics, communications and computer sciences
IEICE transactions on fundamentals of electronics, communications and computer sciences
E79-A
8
1173
1179
https://niigata-u.repo.nii.ac.jp/record/1911/files/e79-a_8_1173.pdf
application/pdf
614.0 kB
2019-07-29