• Title, Summary, Keyword: media frame

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Web-based Real-time 3D Video Communication System for Reality Teleconferencing

  • Ko, Jung-Hwan;Kim, Dong-Kyu;Hwang, Dong-Chun;Kim, Eun-Soo
    • 한국정보디스플레이학회:학술대회논문집
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    • pp.1611-1614
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    • 2005
  • In this paper, a new multi-view 3D video communication system for real-time Reality teleconferencing application is proposed by usin gthe IEEE 1394 digital cameras, Intel Xeon server computer system and Microsoft's DirectShow programming library and its performance is analyzed in terms of image-grabbing frame rate and number of views. The captured two-view image data is compressed by extraction of disparity data between them and transmitted to another client system through the communication network, in which multi-view could be synthesized with this received 2-view data using the intermediate view reconstruction technique and displayed on the multi-view 3D display system. From some experimental results, it is found that the proposed system can display 16-view 3D images with a gray of 8bits and a frame rate of 15fps.

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Frame-level Matching for Near Duplicate Videos Using Binary Frame Descriptor (이진 프레임 기술자를 이용한 유사중복 동영상 프레임 단위 정합)

  • Kim, Kyung-Rae;Lee, Jun-Tae;Jang, Won-Dong;Kim, Chang-Su
    • Journal of Broadcast Engineering
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    • v.20 no.4
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    • pp.641-644
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    • 2015
  • In this paper, we propose a precise frame-level near-duplicate video matching algorithm. First, a binary frame descriptor for near-duplicate video matching is proposed. The binary frame descriptor divides a frame into patches and represent the relations between patches in bits. Seconds, we formulate a cost function for the matching, composed of matching costs and compensatory costs. Then, we roughly determine initial matchings and refine the matchings iteratively to minimize the cost function. Experimental results demonstrate that the proposed algorithm provides efficient performance for frame-level near duplicate video matching.

Development and Effect of the Cancer Prevention Education Program Using Different Media

  • Lee, Young Sung;Choi, Seong Woo;Jeon, Mi Yang
    • International Journal of Contents
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    • v.9 no.4
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    • pp.60-66
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    • 2013
  • Purpose: This study was intended to develop and evaluate the cancer prevention education for general population with different educational media such as booklets, cartoons, web frame comic strips, web flash animation and flash animations on personal digital assistants (PDA). Methods: A total of 125 subjects were divided into 5 groups, each group having 25 members and assigned a different educational media. An educational media was assigned to each group to evaluate the effect of education in the first intervention. In the second intervention, 4 other media, excluding the previously used one, were used to educate the subjects and find out the preferences of educational media. Results: Knowledge about cancer increased significantly after cancer prevention education. They preferred animations on the internet to other media, the highest. Conclusion: Educational programs with various media should be developed for subjects to choose based on their preferences.

MAC Throughput Analysis of MAC Aggregation and Block ACK in IEEE 802.11n (MAC 프레임 집합 전송과 블록 ACK 사용에 따른 IEEE 802.11n 수율 분석)

  • Moon, Kuk-Hyun;Chung, Min-Young;Cho, Kang-Yun
    • Proceedings of the KIEE Conference
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    • pp.467-469
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    • 2006
  • In wireless network environments, as users' demands on high-speed data communications due to increase of multi-media services, the necessity of new high-speed WLAN technologies has appeared. Nowaday, IEEE is standardizing a new WLAN protocol caned as IEEE 802.11n. To effectively use wireless resources, IEEE 802.11n introduces MAC aggregation function which is similar to that in IEEE 802.11e. In case of transmitting several frames without MAC aggregation, the frames include individual frame header and trailer, and their corresponding acknowledgement frames can appear on wireless link. However, if they are aggregated into single MAC frame, we can reduce the number of used bits due to frame headers/trailers and also remove redundant acknowledgement frames. In this paper, we explain two different MAC frame aggregation methods for IEEE 802.11e and IEEE 802.11n and evaluate their throughput by simulations.

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Finite Element Formulation using Arbitrary Lagrangian Eulerian Method for Saturated Porous Media

  • Park, Taehyo;Jung, Sochan
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • pp.375-382
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    • 2003
  • Porous media consist of physically and chemically different materials and have an extremely complicated behavior due to the different material properties of each of its constituents. In addition, the internal structure of porous media has generally a complex geometry that makes the description of its mechanical behavior quite complex. Thus, in order to describe and clarify the deformation behavior of porous media, constitutive models for deformation of porous media coupling several effects such as flow of fluids of thermodynamical change need to be developed in frame of Arbitrary Lagrangian Eulerian (ALE) description. The aim of ALE formulations is to maximize the advantages of Lagrangian and Eulerian methods, and to minimize the disadvantages. Therefore, this method is appropriate for the analysis of porous media that are considered for the behavior of solids and fluids. First of all, governing equations for saturated porous media based on ALE description are derived. Then, weak forms of these equations are obtained in order to implement numerical method using finite element method. Finally, Petrov-Galerkin method Is applied to develop finite element formulation.

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A Study on the 21stCentury Digital Visuality Through Lacan's Notion of the Real Gaze - From an Aspect of Digital Frame Expension - (라깡의 시선도해를 통해서 본 21세기 디지털 시각성 변화 연구 - 디지털 프레임 확장의 관점에서 -)

  • Lim, Sang Guk;Kim, Cheeyong
    • Journal of Korea Multimedia Society
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    • v.21 no.5
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    • pp.638-647
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    • 2018
  • This study aimed to identify visuality changes in the $21^{st}century$ digital visual media art through the expension of digital frames based on visuality represented by Cartesian perspectivalism in the modern age. The visuality of perspective, camera obscura and panorama, which are called modern visual systems, was analyzed to illustrate each characteristic from a viewpoint of a seeing subject. These characteristics of the visual systems were restructured to meet the visuality of the digital era through the illustrations of Lacan's gaze. In addition, the characteristics of frames found in the $21^{st}century$ digital visual media art were identified, and they were categorized into and illustrated from physical, convergent and interactional viewpoints. The outcomes were classified into the $21^{st}century$ digital frame types, and new $21^{st}$century digital visual illustrations were suggested based on the results.

Voice Activity Detection Based on SNR and Non-Intrusive Speech Intelligibility Estimation

  • An, Soo Jeong;Choi, Seung Ho
    • International Journal of Internet, Broadcasting and Communication
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    • v.11 no.4
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    • pp.26-30
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    • 2019
  • This paper proposes a new voice activity detection (VAD) method which is based on SNR and non-intrusive speech intelligibility estimation. In the conventional SNR-based VAD methods, voice activity probability is obtained by estimating frame-wise SNR at each spectral component. However these methods lack performance in various noisy environments. We devise a hybrid VAD method that uses non-intrusive speech intelligibility estimation as well as SNR estimation, where the speech intelligibility score is estimated based on deep neural network. In order to train model parameters of deep neural network, we use MFCC vector and the intrusive speech intelligibility score, STOI (Short-Time Objective Intelligent Measure), as input and output, respectively. We developed speech presence measure to classify each noisy frame as voice or non-voice by calculating the weighted average of the estimated STOI value and the conventional SNR-based VAD value at each frame. Experimental results show that the proposed method has better performance than the conventional VAD method in various noisy environments, especially when the SNR is very low.

News, Public Policy, and Social Justice

  • Kumar, Sunil
    • Asian Journal for Public Opinion Research
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    • v.4 no.3
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    • pp.123-165
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    • 2017
  • In this paper, we look at mediation of public policies in different areas of governance. Editorials appearing in an Indian English language newspaper during the period of an intense public debate on the issue of affirmative action in favor of a section of the population, the Other Backward Classes (OBC) - a popular reference to the socially and educationally backward classes of citizens under India's constitution constitute the sample for the study. Apart from editorials on the public policy of reservation of seats in admission to higher education institutions for the OBC, editorials on three other areas of governance, namely, development, economy, and public administration appearing in the same newspaper, are also consulted to understand media framing of social issues and more specifically, issues of social justice. Inductively identifying the various frames used in its editorials by the newspaper, I detect predominant use of 'personalized' frame in respect of editorials pertaining to the policy area of social justice; and distinguish it from the 'generic' frame of 'characterization' found in theory. The study concludes that the sample editorials in respect of other public policies did not use the personalized frame found in editorials on social justice.

Boundary Match and Block Reliability Based Error Concealment Algorithm (블록 신뢰도와 경계면 매칭 기반의 잡음 은닉 알고리즘)

  • Kim, Do Hyun;Choi, Kyoung Ho
    • Smart Media Journal
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    • v.6 no.2
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    • pp.9-14
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    • 2017
  • A packet loss in wireless environments causes a severe degradation of video quality in video communications. In this paper, a novel video error concealment algorithm is presented by combining boundary errors and a block reliability measure. The block reliability measure decides the reliability of a block by checking residual errors of a block. In the proposed approach, a motion vector of a missing unreliable block in an inter coded frame is obtained initially based on the motion vector of the same block in the reference frame. Furthermore, if the block in the reference frame is unreliable according to the reliability measure, a new motion vector is decided based on block boundary errors around the initial motion vector. According to our simulations, the proposed approach shows promising results for error concealment in error-prone wireless environments.

Greedy Precedent Frame Transmission Technique in VOD System (VoD 시스템에서 탐욕적 선행 전송 기법)

  • Lee, Joa-Hyoung;Jung, In-Bum
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.14 no.3
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    • pp.603-612
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    • 2010
  • Recently, with the advance of computing and networking technique, the high speed internet becomes widespread, however, it is still hard job to do streaming the media which requires high network bandwidth over the internet. Previous VoD system researches for streaming over the internet mainly proposed techniques that controls the QoS(Quality of Service) of the media in proportion to the network status. Though, this could be the solution for the service provider while the service user who wants constant QoS may not satisfy with variable QoS. In the paper, we propose greedy precedent frame transmission technique, GPFT, for guarantee of constant QoS. In GPFT, Streaming VoD server prefetches precedent frames and transmits the frame greedily by increasing the frame transmission rate while the available network bandwidth is high. The GPFT uses the prefetched precedent frames to guarantee the QoS while the available network bandwidth is low. The experiment result shows that the proposed GPFT could guarantee the constant QoS by prefetching the frames adaptively to the network bandwidth with the characteristic of video stream.