• Title, Summary, Keyword: crosstalk

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Analysis of the Different Influences of Additive or Subtractive Three-dimensional Crosstalk on the Level of the Visual Fatigue

  • Park, Minyoung;Kim, Joohwan;Choi, Hee-Jin
    • Journal of the Optical Society of Korea
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    • v.19 no.1
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    • pp.38-44
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    • 2015
  • Three-dimensional (3D) crosstalk is one of the main causes of visual fatigue and needs to be suppressed. The 3D crosstalk can be categorized into two different kinds according to its appearance-additive 3D crosstalk and subtractive 3D crosstalk. In this paper, we analyze the influence of different kinds of 3D crosstalk to the perceived level of visual fatigue in order to suppress the perceived 3D crosstalk effectively.

A Study On Effects of The Termination Conditions on Crosstalk in The A/D Converter Circuit (A/D 변환기 회로에서 터미네이션 임피던스의 crosstalk에 대한 영향 분석)

  • Lim, Han-Sang
    • Journal of the Institute of Electronics Engineers of Korea SC
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    • v.47 no.2
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    • pp.35-42
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    • 2010
  • In this study, crosstalk between dominant interconnect pairs in an A/D converter circuit is analyzed in frequency domain and effects of termination conditions on crosstalk are described, based on the practical circuit conditions. An A/D converter circuit is a mixed circuit where both clean and noisy signals coexist such that the circuit probably suffers from distortion by crosstalk. An analog input signal and the reference voltage signal, which dominate the overall conversion performance of the A/D converter circuit, are ready to be distorted by crosstalk and include specific termination conditions, such as non-matching and capacitive termination, respectively. Thus, this study presents the model of crosstalk considering impedance mismatch at both ends and analyzes effects of the practical termination conditions in the analog input and the reference voltage interconnects on crosstalk. A typical circuit configuration of the two interconnects is described and crosstalk including near-end and far-end termination impedances is modeled. Effects of the near-end impedance mismatch in the analog input interconnect and the far-end capacitive termination in the reference voltage interconnect are estimated in the frequency domain by using the model of crosstalk and experiments are performed to confirm the estimated results. Microstrip lines are used as interconnects, involving the increase of loss in high frequencies.

An Efficient Crosstalk Cancellation Algorithm Using Pole-zero Dewarping (Pole-zero Dewarping을 이용한 효율적인 Crosstalk 제거 알고리듬)

  • Lee Junho;Park Young-cheol;Youn Dae-hee;Jeong Jae-woong
    • The Journal of the Acoustical Society of Korea
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    • v.24 no.3
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    • pp.133-140
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    • 2005
  • Crosstalk canceller in stereo channel audio reproduction system has the purpose to deliver desired signals exactly at the listener's ear. Generally. it has a Poor performance in low frequency bands. Frequency-warped Otters are used to provide improved performance in crosstalk canceller for these problems. However. such filters are more complex to implement than conventional filters. This paper presents an efficient method for low-order IIR approximation of frequency warped crosstalk cancellation filters using Pole-zero dewarping. The method preserves the advantages of frequency warping, but has a computational complexity that is similar to the conventional method. This Paper also presents a series of experiments that validate the method of crosstalk canceller.

Analysis of crosstalk of dual-offset stripline in a FR-4 high multilayer PCB (박판화된 다층기판에서 dual-offset stripline 구조의 누화 해석)

  • 이명호;전용일;전병윤;박권철;강석열
    • Journal of the Korean Institute of Telematics and Electronics S
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    • v.35S no.4
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    • pp.20-29
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    • 1998
  • In this paper, we find the values of near-end crosstalk coefficients in dual-offset stripline of a FR-4 multilayer PCB by an analytic method and a HSPICE simulation method, define calculation errors inananlytic method and the application range, simulate near-end crosstalk coefficients of the FCT(Fast CMOS TTL) in complicated dual-offset stripline by HSPICE and analyze near-end crosstalk and far-end crosstalk coefficients in dual-offset stripline. So, we analyze coupling structure of the near-end crosstalk and far-end crosstalk in the complicated dual-offset striplines that are 1[pF] capacitors termainated, and define a coupling formula of near-end crosstalk and far-end crosstalk coefficients dual-offset striplines.

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Crosstalk Noise by Shrinkage of Thick Holographic Photopolymer (광폴리머를 사용한 두꺼운 홀로그램의 수축에 의한 혼선잡음)

  • Hwang Yongsop;Kim Kun-Yul;Park Jooyoun;Nam Haeun
    • 정보저장시스템학회:학술대회논문집
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    • pp.134-138
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    • 2005
  • The crosstalk noise of thick holographic photopolymer is studied. Three different experiments, (1) reading area dependency (2) post-exposure effect (3) effect of later recorded holograms on earlier recorded holograms, have been accomplished and a tendency of crosstalk noises has been found for each case. The larger reading area, the higher crosstalk noises fur the later recorded holograms. Before the post-exposure the crosstalk noises are higher in the earlier recorded holograms, but after the post-exposure the crosstalk noises we higher in the later recorded holograms. The crosstalk noises of the earlier recorded holograms become higher as more holograms are recorded by multiplexing. To explain the tendency of crosstalk noises of these experiments, we suggest a model considering the anisotropic shrinkage of the photopolymer According to the model. the shrinkage is more dominant at the center of the recorded region than the edge of that. After the post-exposure, however, the amount of shrinkage becomes the same far the whole recorded region. The results of all three experiments are well explained by this model.

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The Effects of Stimulus-background Contrast, Background Texture Density and Screen Disparity of Stimulus on Crosstalk Perception (자극과 배경의 대비, 배경 텍스쳐 밀도, 자극의 화면 시차가 크로스톡 지각에 미치는 영향)

  • Park, JongJin;Li, Hyung-Chul O.;Kim, ShinWoo
    • Journal of Broadcast Engineering
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    • v.18 no.2
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    • pp.225-236
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    • 2013
  • 3D contents could cause unique 3D visual fatigue. Screen disparity, image blurring, and crosstalk are known to be the three major factors responsible for the fatigue. Among these, screen disparity and image blurring are content factors, that is, one can directly manipulate contents themselves to handle visual fatigue caused by these two factors. On the other hand, because crosstalk is closely tied to physical characteristics of 3D display, it is difficult or even impossible to reduce crosstalk-driven visual fatigue unless one replaces 3D display itself (for example, from active to passive display). However, the effects of crosstalk on 3D visual fatigue depends on visual stimulus features (that is, contents), and thus it is possible to manipulate stimulus features in order to handle visual fatigue caused by crosstalk. Hence, this research tested the effects of visual stimulus features on crosstalk (which then causes 3D visual fatigue). Using relative depth discrimination task, we tested the effects of stimulus-background contrast, background texture density, and screen disparity on the degree of perceived crosstalk. The results showed that crosstalk decreases with presence of background texture and with less degree of screen disparity.

Crosstalk Analysis on Printed Circuit Board (인쇄뢰로기판의 누화해석)

  • 박경희;김제영;김수중
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.28A no.9
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    • pp.700-707
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    • 1991
  • Transmission line crosstalk of a printed circuit baord terminated with the linear resistive and nonlinear terminal network is analyzed. Based on a quasi-static approximation, crosstalk voltage is computed in frequency domain by applying the modal analysis. A scheme to calculate the maximum crosstalk voltage for a line terminated with the nonlinear digital gate is proposed. And also, crosstalk quantities are numerically obtained for the microstrip and strip line, and compared with the experimental data to validate relevance of this method.

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A Low-Crosstalk Design of 1.25 Gbps Optical Triplexer Module for FTTH Systems

  • Kim, Sung-Il;Park, Sun-Tak;Moon, Jong-Tae;Lee, Hai-Young
    • ETRI Journal
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    • v.28 no.1
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    • pp.9-16
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    • 2006
  • In this paper, we analyzed and measured the electrical crosstalk characteristics of a 1.25 Gbps triplexer module for Ethernet passive optical networks to realize fiber-tothe-home services. Electrical crosstalk characteristic of the 1.25 Gbps optical triplexer module on a resistive silicon substrate should be more serious than on a dielectric substrate. Consequently, using the finite element method, we analyze the electrical crosstalk phenomena and propose a silicon substrate structure with a dummy ground line that is the simplest low-crosstalk layout configuration in the 1.25 Gbps optical triplexer module. The triplexer module consists of a laser diode as a transmitter, a digital photodetector as a digital data receiver, and an analog photodetector as a cable television signal receiver. According to IEEE 802.3ah and ITU-T G.983.3, the digital receiver and analog receiver sensitivities have to meet -24 dBm at $BER=10^{-12}$ and -7.7 dBm at 44 dB SNR. The electrical crosstalk levels have to maintain less than -86 dB from DC to 3 GHz. From analysis and measurement results, the proposed silicon substrate structure that contains the dummy line with $100\;{\mu}m$ space from the signal lines and 4 mm separations among the devices satisfies the electrical crosstalk level compared to a simple structure. This proposed structure can be easily implemented with design convenience and greatly reduce the silicon substrate size by about 50 %.

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On the Minimization of Crosstalk Conflicts in a Destination Based Modified Omega Network

  • Bhardwaj, Ved Prakash;Nitin, Nitin
    • Journal of Information Processing Systems
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    • v.9 no.2
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    • pp.301-314
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    • 2013
  • In a parallel processing system, Multi-stage Interconnection Networks (MINs) play a vital role in making the network reliable and cost effective. The MIN is an important piece of architecture for a multiprocessor system, and it has a good impact in the field of communication. Optical Multi-stage Interconnection Networks (OMINs) are the advanced version of MINs. The main problem with OMINs is crosstalk. This paper, presents the (1) Destination Based Modified Omega Network (DBMON) and the (2) Destination Based Scheduling Algorithm (DBSA). DBSA does the scheduling for a source and their corresponding destination address for messages transmission and these scheduled addresses are passed through DBMON. Furthermore, the performance of DBMON is compared with the Crosstalk-Free Modified Omega Network (CFMON). CFMON also minimizes the crosstalk in a minimum number of passes. Results show that DBMON is better than CFMON in terms of the average number of passes and execution time. DBSA can transmit all the messages in only two passes from any source to any destination, through DBMON and without crosstalk. This network is the modified form of the original omega network. Crosstalk minimization is the main objective of the proposed algorithm and proposed network.

Crosstalk Reduction of Glasses-free 3D Displays using Multiview Image Processing (다시점 영상처리를 이용한 무안경 3차원 디스플레이의 크로스톡 저감 방법)

  • Kim, Sung-Yeol;Lee, Jin-Sung;Choi, Sang Mi
    • 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.