• Title, Summary, Keyword: media frame

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3D DCT Video Information Hiding

  • Kim, Young-Gon;Jie Yang;Lee, Hye-Joo;Hong, Jin-Woo;Lee, Moon-Ho
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • pp.169-172
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    • 2002
  • Embedding information into video data is a topic that recently gained increasing attention. This paper proposes a new approach for digital watermarking and secure copyright protection of video, the principal aim being to discourage illicit copying and distribution of copyrighted material. The method presented here is based on the three dimensional discrete cosine transform of video scene, in contrast with previous works on video watermarking where each video frame was marked separately, or where only intra-frame or motion compensation parameters were marked in MPEG compressed videos. The watermark sequence used is encrypted, pseudo-noise signal to the video. The performance of the presented technique is evaluated experimentally

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Robust Target Model Update for Mean-shift Tracking with Background Weighted Histogram

  • Jang, Yong-Hyun;Suh, Jung-Keun;Kim, Ku-Jin;Choi, Yoo-Joo
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.10 no.3
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    • pp.1377-1389
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    • 2016
  • This paper presents a target model update scheme for the mean-shift tracking with background weighted histogram. In the scheme, the target candidate histogram is corrected by considering the back-projection weight of each pixel in the kernel after the best target candidate in the current frame image is chosen. In each frame, the target model is updated by the weighted average of the current target model and the corrected target candidate. We compared our target model update scheme with the previous ones by applying several test sequences. The experimental results showed that the object tracking accuracy was greatly improved by using the proposed scheme.

The Limit of Conservative-Progressive Frame and Strategy of Media Criticism ('보수·진보 프레임'의 한계와 미디어 비평의 과제)

  • Shon, Seok Choon
    • Korean journal of communication and information
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    • v.82
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    • pp.7-28
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    • 2017
  • This paper argues that media criticism should be reestablished as an academic movement leading to the maintenance and maturity of democracy. Korean democracy has been withdrawn both procedurally and practically. However, the Korean media do not properly monitor democratic retreat. The purpose of journalism is to provide people with the information they need to be free and self-governed, and the public sphere is a condition of deliberative democracy. This paper proposed three practical strategies for media criticism. First, it is the overcoming of the conservative-progressive frame. It is important to look at what kind of media is responsible for democratic retreat. Second, media criticism should be expanded on workers and capitalists. Korea's labor relations are as distorted as the public sphere. Korean journalism did not set agenda for labor relations. Most reports were 'capitalist bias'. Finally, Media criticism should be the empowerment of the people who are the sovereigns of the media.

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An Experimental Study on the Effects of Television News Frame -on the Audiences' Perception about North Korea- (북한 관련 TV뉴스의 프레이밍 방식에 따른 수용자의 인식 변화에 대한 실험연구)

  • Kim, Seong-Joon;Lee, Chang-Hyun
    • Korean journal of communication and information
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    • v.19
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    • pp.95-123
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    • 2002
  • There has been a change in the South Korean policy towards the North which in turn changed the news frame of television broadcasters in South Korea. We did an empirical analysis of how this changed news frame influence the audiences' perception of North Korea and Unification. An experimental design was carried out in order to test the response of the audiences to different news frame. The results show that the respondents' perception towards North Korea were changed when exposed to a specific type of new frame. This confirms the existing knowledge on how news frame influence the perception of TV viewers. This research can serve as background information when making decisions to how the South Korean news media should report North Korea and Unification related news stories.

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Effective Hand Gesture Recognition by Key Frame Selection and 3D Neural Network

  • Hoang, Nguyen Ngoc;Lee, Guee-Sang;Kim, Soo-Hyung;Yang, Hyung-Jeong
    • Smart Media Journal
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    • v.9 no.1
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    • pp.23-29
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    • 2020
  • This paper presents an approach for dynamic hand gesture recognition by using algorithm based on 3D Convolutional Neural Network (3D_CNN), which is later extended to 3D Residual Networks (3D_ResNet), and the neural network based key frame selection. Typically, 3D deep neural network is used to classify gestures from the input of image frames, randomly sampled from a video data. In this work, to improve the classification performance, we employ key frames which represent the overall video, as the input of the classification network. The key frames are extracted by SegNet instead of conventional clustering algorithms for video summarization (VSUMM) which require heavy computation. By using a deep neural network, key frame selection can be performed in a real-time system. Experiments are conducted using 3D convolutional kernels such as 3D_CNN, Inflated 3D_CNN (I3D) and 3D_ResNet for gesture classification. Our algorithm achieved up to 97.8% of classification accuracy on the Cambridge gesture dataset. The experimental results show that the proposed approach is efficient and outperforms existing methods.

A frame detection method for DVB-S2x superframe receivers based on beam-hopping satellite transmission (빔-호핑 위성 전송 기반의 DVB-S2x 슈퍼프레임 수신기를 위한 프레임 검출 기법)

  • Oh, Jonggyu;Oh, Dukgil
    • Proceedings of the Korean Society of Broadcast Engineers Conference
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    • pp.24-27
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    • 2017
  • 본 논문에서는 빔-호핑 위성 전송 기반의 DVB-S2x 슈퍼프레임 수신기를 위한 프레임 검출 기법을 제안한다. 제안하는 검출 기법은 2 체배 오버샘플링 레이트에서(over-sampling rate)에서 동작을 수행하며, 슈퍼프레임의 헤더를 구성하는 start of super-frame (SOSF)과 super frame format indicator (SFFI)를 모두 이용하여 하드웨어 복잡도를 줄이면서도 견고하게 프레임을 검출할 수 있다.

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A Novel Selective Frame Discard Method for 3D Video over IP Networks

  • Chung, Young-Uk
    • KSII Transactions on Internet and Information Systems (TIIS)
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    • v.4 no.6
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    • pp.1209-1221
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    • 2010
  • Three dimensional (3D) video is expected to be an important application for broadcast and IP streaming services. One of the main limitations for the transmission of 3D video over IP networks is network bandwidth mismatch due to the large size of 3D data, which causes fatal decoding errors and mosaic-like damage. This paper presents a novel selective frame discard method to address the problem. The main idea of the proposed method is the symmetrical discard of the two dimensional (2D) video frame and the depth map frame. Also, the frames to be discarded are selected after additional consideration of the playback deadline, the network bandwidth, and the inter-frame dependency relationship within a group of pictures (GOP). It enables the efficient utilization of the network bandwidth and high quality 3D IPTV service. The simulation results demonstrate that the proposed method enhances the media quality of 3D video streaming even in the case of bad network conditions.

Frame Rate Up-Conversion with Occlusion Detection Function (폐색영역탐지 기능을 갖는 프레임율 변환)

  • Kim, Nam-Uk;Lee, Yung-Lyul
    • Journal of Broadcast Engineering
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    • v.20 no.2
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    • pp.265-272
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    • 2015
  • A new technology on video frame rate up-conversion (FRUC) is presented by combining the median filter and motion estimation (ME) with an occlusion detection (OD) method. First, ME is performed to have a motion vector. Then, the OD method is used to refine motion vector in the occlusion region. Since the wrong motion vector can be obtained with high possibility in the occluded area, a median filtering that less depends on the motion vector is applied to that area, and since the motion vector is continuous and robust in the non-occluded area, BDMC(Bi-Directional Motion Compensated interpolation) is applied to obtain interpolated image in that area. BDMC using the bi-directional motion vectors achieves good results when continuity and robustness of the motion vector is higher. Experimental results show that the proposed algorithm provides better performance than the conventional approach. The average gain of PSNR (Peak Signal to Noise Ratio) is approximately 0.16 dB in the test sequences compared with BDMC.

Frame Management Method to Support QoS of MAC Protocol Based TDMA in Mesh Network Environment (메쉬네트워크 환경에서 TDMA기반 MAC 프로토콜의 QoS를 지원하기 위한 프레임 관리기법)

  • Jang, In-Yong;Lee, Sun-Young
    • The Journal of The Institute of Internet, Broadcasting and Communication
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    • v.9 no.6
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    • pp.75-87
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    • 2009
  • It is difficult to support QoS service in existing MAC Protocols in Wireless Mesh Network environments. while DCF can not support QoS, EDCA is operated with prioritized channel access method but can not give full performance. This thesis proposes frame management method to support QoS in Multi-Media DCF(MMDCF) MAC Protocol working in wireless mesh network. MMDCF uses ACH phase in TDMA frame to perform selection and elimination. Prioritized phases's count m and Fair Elimination phases's count n determine contention level and make string probability to only one win the contention. Forced TDMA Frame release method can support QoS requirements. MMDCF results good performance and good channel efficiency to support QoS requirements better than EDCA in multimedia stream environments.

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A Study on the News Frame Analysis of Real Estate Policy (정부의 부동산 정책에 대한 언론의 보도 프레임 분석)

  • Kim, Sung-Yong;Oh, Sae-Joon
    • The Journal of the Korea Contents Association
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    • v.16 no.7
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    • pp.221-230
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    • 2016
  • The public mostly get the information regarding real estate policy not from the press release of the government but from news articles. This type of information, though, might be delivered in a different frame depending on inclination of media or press. The media runs the articles within its own frame, so that it often conveys either expectation or concern depending on its inclination. This study analyzed the articles regarding 'Agreement to revise three major real estate regulations to perk up property market' and examined how the real estate policy imprinted in them depending on the disposition of the press. The results showed that the conservative press ran articles within a positive frame expressing favorable expectation. On the other hand, progressive press mostly kept neutral or unfavorable tone on the same regulations within the negative frame. Therefore, it was confirmed that there exist different frames within articles depending on their disposition.