• Proceedings of the Optical Society of Korea Conference
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• 2007.02a
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• pp.229-230
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• 2007

• ETRI Journal
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• v.44 no.4
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• pp.686-694
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• 2022

Fog screens offer a great advantage to be used as scattering screens in three-dimensional displays. In the absence of a fixed rigid form, fog screens work as screens without any physical obstruction. The density of water droplets can be regulated to adjust the screen's transparency and scattering level. This study proposes a method for crosstalk reduction between adjacent viewing windows by decreasing the divergence of view of the projector, with concentration lenses. By applying the Scheimpflug principle, we also reduce the keystone effect, which occurs when the fog screen is slanted with respect to the optical axis. In this study, we have realized a tabletop multiview fog display without any structures on the table and established that the proposed method is feasible for decreasing crosstalk effectively.

• Journal of Electrical Engineering and Technology
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• v.11 no.1
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• pp.175-183
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• 2016

This paper brings out a novel method for reducing Near end and Far end Crosstalk using Electromagnetic Band Gap structures (EBG) in High Speed RF transmission lines. This work becomes useful in high speed closely spaced Printed Circuit Board (PCB) traces connected to multi core processors. By using this method, reduction of −40dB in Near-End Crosstalk (NEXT) and −60 dB in Far End Crosstalk (FEXT) is achieved. The results are validated through experimental measurements. Time domain analysis is performed to validate the signal integrity property of coupled transmission lines.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.38C no.10
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• pp.928-936
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• 2013

3D crosstalk is one of the disturbing things to recognize 3D images. This is caused by the phenomenon that input image for left eye is transferred at the right eye and right eye is transferred at the left eye because of the imperfect isolation by the device characteristics. In this paper, we review the 3D PDP (Plasma Display Panel) operation using active shutter glasses and crosstalk measurement method and investigate the major cause of 3D crosstalk and extend conventional 3D crosstalk using full white and full black image input to Gray-to-Gray (GtoG) 3D crosstalk. We suggest a specific method to reduce Gray-to-Gray 3D crosstalk by using Look up Table (LUT) and sub-field mapping in PDP. And then, we verify the method by measuring GtoG 3D crosstalk rate through specific test images and numerical results.

• The Journal of the Acoustical Society of Korea
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• v.35 no.5
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• pp.349-357
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• 2016

In this work, we proposed various structural methods to reduce the crosstalk between elements in a planar array of underwater acoustic transducers and investigated the efficacy of each method through finite element analysis. It is shown that the effects of crosstalk reduction increase as the depth of the kerf among elements and the width of the kerf increase, and the elastic stiffness of the kerf filler decreases. Results of this study are expected to be useful in designing the structure of underwater acoustic planar array transducers to maximize their performance.

• Proceedings of the IEEK Conference
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• 2002.07a
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• pp.523-526
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• 2002

The crosstalk among coupled microstrip lines is the major limiting factors of signal qualities in the high-speed digital and communication equipment. In this paper, a three-dimensional finite difference time domain (FDTD) method is applied to analyze the crosstalk between the coupled microstrip lines. The proposed structures of the coupled microstrip lines are investigated to reduce the coupling in a simple way by modifying their ground plane with an optimum gap. The examples of these structures with the different sizes of the gaps on their ground plane are studied. These structures are considered as the four-port network to evaluate transmission efficiency, near- and far-end crosstalk. Gaussian pulse is excited to evaluate the frequency characteristics from dc to 30 ㎓. The transmission efficiency, near- and far-end crosstalk of each structure of the coupled microstrip lines are demonstrated. The numerical results of this study show that the majority of crosstalk is the far-end crosstalk. The usage of the optimum gap on the ground plane can reduce the far-end crosstalk of the coupled microstrip lines while the transmission efficiency is nearly equal.

• Journal of Broadcast Engineering
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• v.21 no.1
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• pp.66-75
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• 2016

In this paper, we present a new method to reduce crosstalk of a glasses-free three-dimensional (3D) display using a multi-view image processing technique. Since crosstalk makes the current view image mixed with its neighboring ones, the output 3D image becomes severely blurred. We apply adaptive depth retargeting and view gradient-based crosstalk inverse filtering onto a multi-view image to minimize crosstalk of the glasses-free 3D display. In addition, overflow and underflow pixels are compensated by epipolar image pixel interpolation so that visual artifacts are minimized. Experimental results show that the proposed method reduces crosstalk more efficiently than the previous work while improving 3D image quality.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.23 no.2
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• pp.177-186
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• 2012

In this paper, we propose a design method that the crosstalk of probe connector pins satisfy the limitation of -30 dB. The parameters(inductance and capacitance) were extracted in the grid-structured probe connector pin system, and it is shown that the new parameters are easily calculated with increasing ground pin numbers using the previously calculated parameters. In addition, the crosstalk reduction algorithm by employing more grounds around the signal pin has been suggested, and it is confirmed that the suggested method is quite effective especially for the reduction of inductive couplings. Finally, we suggested the correlation between the pitch and the length of the pins to satisfy the crosstalk limitation of -30 dB with the given number of ground pins, which will be quite useful when design a probe connector pin system.

• Journal of the Institute of Electronics Engineers of Korea SD
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• v.38 no.4
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• pp.302-312
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• 2001

As the data transfer rate between chips gets higher, both crosstalk and SSN (Simultaneous Switching Noise) deteriorate seriously the performance of a system. The proposed interface scheme uses P-CTR and N-CTR(Positive/Negative Constant Transition Rate) which encodes data at both falling and rising edges, where the transition directions of N-CTR and P-CTR are opposite. And the proposed bus system places two P-CTR drivers and two N-CTR drivers alternatively. In the proposed P/N-CTR interface scheme, the signals of neighboring interconnection lines at both sides of a bus will not switch simultaneously in the same direction, which leads to reduction in the maximum crosstalk and SSN compared to conventional interfaces. For verification of noise reduction of the proposed interface scheme, the scheme is applied to several kinds of bit-wide buses with various interconnection structures, and HSPICE simulation was performed with 0.35 ${\mu}{\textrm}{m}$ SPICE parameters. The simulation results show that in the 32-bit or less wide bus, the maximum SSN and crosstalk are reduced to at least 26.78% and 50%, respectively in comparison with the conventional interface scheme.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.11 no.3
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• pp.365-371
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• 2000

In this paper, we introduce a noise reduction method using polarizers in a wireless optical interconnections. If we use polarizers in a differential detector, the noise reduction capability is improved. In a case that two optical signal beams of similar wavelength are overlapped in space and crosstalk is a serious problems, we can detect each channel separately without crosstalk using two orthogonal polarizers. This method is very simple and easy to use.