Results 251 to 260 of about 16,019,830 (296)

Local All-Pass filters for optical flow estimation

2015 IEEE International Conference on Acoustics, Speech and Signal Processing (ICASSP), 2015
The optical flow is a velocity field that describes the motion of pixels within a sequence (or set) of images. Its estimation plays an important role in areas such as motion compensation, object tracking and image registration. In this paper, we present a novel framework to estimate the optical flow using local all-pass filters.
Christopher Gilliam, Thierry Blu
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Signal processor implementation of digital all-pass filters

IEEE Transactions on Acoustics, Speech, and Signal Processing, 1988
The implementation of digital filter structures of all-pass subfilters using modern high-speed signal processors is investigated. The focus is on digital all-pass filters realized as a cascade of first- and second-order all-pass sections. Wave digital all-pass sections are considered, with special emphasis on developing two-port adaptor structures that
Markku Renfors, Evangelos Zigouris
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Factorized all-pass IIR adaptive notch filters

2004 IEEE International Conference on Acoustics, Speech, and Signal Processing, 2004
A new family of IIR adaptive notch filters is presented. The family is based on a second-order factorization of the all-pass transfer function that forms the multiple notch filter. These realizations represent an extension of a previous ad-hoc scheme for adaptive notch filtering that avoids a high-order polynomial root finding in order to obtain the ...
Juan E. Cousseau, Pedro D. Doñate, Yaohui Liu 0006   +2 more
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Almost periodic all-pass filters

Systems & Control Letters, 1990
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
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All-Pass Filters Using A Single Current Conveyor

Proceedings of the 6th International Conference on Optimization of Electrical and Electronic Equipments, 1999
Current conveyors are unity gain active elements exhibiting high linearity, wide dynamic range and better high frequency performance compared with their voltage mode counterparts. In this study a set of single positive-type second generation current conveyor based all-pass filters is presented and a catalogue of canonical topologies is given with some ...
OGUZHAN CICEKOGLU, HAKAN KUNTMAN, SERKAN BERK   +2 more
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Voltage-mode MOS-only all-pass filter

2011 34th International Conference on Telecommunications and Signal Processing (TSP), 2011
In this study, a simple voltage-mode first-order all-pass (AP) filter implementation is presented which employs only MOS transistors instead of active elements like CCH, CDBA, FTFN, etc. that include large number of transistors. Transconductance (g m ) and gate-to-source parasitic capacitance (C gs ) of the transistors are employed to form the AP ...
Bilgin Metin, Emre Arslan, Norbert Herencsar, Oguzhan Cicekoglu   +3 more
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Optical All-Pass Filter in Silicon-on-Insulator

ACS Photonics, 2020
Optical all-pass filters, which exhibit constant amplitude response and pure phase variation, are extremely desired when only optical phase manipulation is required.
Weijun Jiang, Lu Xu, Yifan Liu, Yu Chen, Xiaolong Liu, Yu Yu, Yuan Yu, Xinliang Zhang   +7 more
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All Pass Filter using DTMOS Technique

2020 International Conference on Smart Electronics and Communication (ICOSEC), 2020
In this paper, All Pass Filter is designed using the Dynamic Threshold MOS Transistor (DTMOS) technique. The proposed filter is operable at very low voltage and comprising many advantages over the existing all pass filters. In this work, two external elements are used: one resistor and one capacitor, the resistor can be used as active elements so that ...
Bhawana Singh, S. Maheshwari
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Oscillations in a first-order all-pass filter

International Journal of Electronics, 1970
An oscillatory closed-loop system with the cascade combination of a first-order all-pass network, an amplifier and a clipper is described. It is seen to generate a discontinuous oscillation whoso repetition rate is adjustable by gain variation of the amplifier.
P. C. SEN, D. PATRANABIS
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All-pass filters based on CCII− and CCCII−

International Journal of Electronics, 2004
This paper proposes a first-order all-pass filter using one negative type second-generation current conveyor (CCII−), two resistors and a capacitor. From the proposed CCII− based filter, by replacing the CCII− and a resistor by a negative second-generation current-controlled conveyor (CCCII−) a new filter is developed which requires only one each of ...
Neeta Pandey, Sajal K. Paul *
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