The Experts below are selected from a list of 7140 Experts worldwide ranked by ideXlab platform
Masaaki Ikehara - One of the best experts on this subject based on the ideXlab platform.
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UNEQUAL LENGTH FIRST-ORDER LINEAR-PHASE FILTER BankS FOR EFFICIENT IMAGE CODING
2015Co-Authors: Yuichi Tanaka, Masaaki Ikehara, Truong Q. NguyenAbstract:In this paper, we present the structure and design method for a first-order linear-phase filter Bank (FOLPFB) which has unequal filter lengths in its Synthesis Bank (UFLPFB). A FOLPFB is a general-ized version of biorthogonal LPFBs regarding their Synthesis filter lengths. Ringing artifact is the main disadvantage of image coding based on FOLPFBs. UFLPFBs can reduce the ringing artifacts as well as approximate smooth regions well. Index Terms — First-order linear-phase filter Banks, biorthogo-nal filter Banks, unequal length filter Banks, image coding. 1
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unequal length first order linear phase filter Banks for efficient image coding
International Conference on Image Processing, 2007Co-Authors: Yuichi Tanaka, Masaaki IkeharaAbstract:In this paper, we present the structure and design method for a first-order linear-phase filter Bank (FOLPFB) which has unequal filter lengths in its Synthesis Bank (UFLPFB). A FOLPFB is a generalized version of biorthogonal LPFBs regarding their Synthesis filter lengths. Ringing artifact is the main disadvantage of image coding based on FOLPFBs. UFLPFBs can reduce the ringing artifacts as well as approximate smooth regions well.
Yuichi Tanaka - One of the best experts on this subject based on the ideXlab platform.
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UNEQUAL LENGTH FIRST-ORDER LINEAR-PHASE FILTER BankS FOR EFFICIENT IMAGE CODING
2015Co-Authors: Yuichi Tanaka, Masaaki Ikehara, Truong Q. NguyenAbstract:In this paper, we present the structure and design method for a first-order linear-phase filter Bank (FOLPFB) which has unequal filter lengths in its Synthesis Bank (UFLPFB). A FOLPFB is a general-ized version of biorthogonal LPFBs regarding their Synthesis filter lengths. Ringing artifact is the main disadvantage of image coding based on FOLPFBs. UFLPFBs can reduce the ringing artifacts as well as approximate smooth regions well. Index Terms — First-order linear-phase filter Banks, biorthogo-nal filter Banks, unequal length filter Banks, image coding. 1
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unequal length first order linear phase filter Banks for efficient image coding
International Conference on Image Processing, 2007Co-Authors: Yuichi Tanaka, Masaaki IkeharaAbstract:In this paper, we present the structure and design method for a first-order linear-phase filter Bank (FOLPFB) which has unequal filter lengths in its Synthesis Bank (UFLPFB). A FOLPFB is a generalized version of biorthogonal LPFBs regarding their Synthesis filter lengths. Ringing artifact is the main disadvantage of image coding based on FOLPFBs. UFLPFBs can reduce the ringing artifacts as well as approximate smooth regions well.
Truong Q. Nguyen - One of the best experts on this subject based on the ideXlab platform.
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UNEQUAL LENGTH FIRST-ORDER LINEAR-PHASE FILTER BankS FOR EFFICIENT IMAGE CODING
2015Co-Authors: Yuichi Tanaka, Masaaki Ikehara, Truong Q. NguyenAbstract:In this paper, we present the structure and design method for a first-order linear-phase filter Bank (FOLPFB) which has unequal filter lengths in its Synthesis Bank (UFLPFB). A FOLPFB is a general-ized version of biorthogonal LPFBs regarding their Synthesis filter lengths. Ringing artifact is the main disadvantage of image coding based on FOLPFBs. UFLPFBs can reduce the ringing artifacts as well as approximate smooth regions well. Index Terms — First-order linear-phase filter Banks, biorthogo-nal filter Banks, unequal length filter Banks, image coding. 1
Markku Renfors - One of the best experts on this subject based on the ideXlab platform.
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generation of filter Bank based multicarrier waveform using partial Synthesis and time domain interpolation
IEEE Transactions on Circuits and Systems, 2010Co-Authors: Tero Ihalainen, A Viholainen, Tobias Hidalgo Stitz, Markku RenforsAbstract:Recently, multirate filter Banks have been recognized as high performance signal processing tools that could significantly enhance the efficiency and flexibility of future wireless communications. Filter Bank-based multicarrier (FBMC) modulation allows increasing the spectral efficiency of high data rate transmission, both through the lack of time domain guard periods and the reduced frequency domain guard bands. Further, the inherent frequency selectivity is regarded as a vital characteristic, which enables high quality radio scene analysis, necessary for successful deployment of dynamic spectrum access in the context of cognitive radio technology. When applied to multicarrier communications, the filter Banks are operated in the so-called transmultiplexer configuration where typically equal-size Synthesis and analysis filter Banks are utilized at the transmitter and receiver, respectively. This paper presents a new approach to generate an FBMC signal waveform. We focus on contiguous narrowband subcarrier allocation, which is often encountered in uplink transmission. Instead of using a full-size M-subchannel Synthesis filter Bank, the proposed scheme relies on a cascade of a P-subchannel Synthesis Bank (P ≪ M), time domain interpolation, and a user-specific frequency shift. This method allows constructing a transmitter-receiver pair using Synthesis and analysis filter Banks of different sizes. The presented approach is shown to provide notable computational complexity savings over a wide range of practical user bandwidth allocations, when compared to the conventional implementation consisting of equally sized filter Banks. Therefore, this novel scheme provides flexible and low-complexity Synthesis of spectrally well-localized FBMC uplink waveforms, which show strong potential for future broadband mobile communications.
Yoram Bresler - One of the best experts on this subject based on the ideXlab platform.
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Generic Feasibility of Perfect Reconstruction With Short FIR Filters in Multichannel Systems
IEEE Transactions on Signal Processing, 2011Co-Authors: Behzad Sharif, Yoram BreslerAbstract:We study the feasibility of short finite impulse response (FIR) Synthesis for perfect reconstruction (PR) in generic FIR filter Banks. Among all PR Synthesis Banks, we focus on the one with the minimum filter length. For filter Banks with oversampling factors of at least two, we provide prescriptions for the shortest filter length of the Synthesis Bank that would guarantee PR almost surely. The prescribed length is as short or shorter than the analysis filters and has an approximate inverse relationship with the oversampling factor. Our results are in form of necessary and sufficient statements for PR feasibility that hold generically, hence only fail for elaborately designed nongeneric examples. We provide extensive numerical verification of the theoretical results and demonstrate that the gap between the derived filter length prescriptions and the true minimum is small. Finally, we demonstrate that when our PR conditions are not satisfied, the unavoidable distortion in the reconstruction is substantial. The results have potential applications in Synthesis FB design problems, where the analysis Bank is given, and for analysis of fundamental limitations in blind signals reconstruction from data collected by unknown subsampled multichannel systems.
