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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of Broadcast Engineering
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Journal DOI :
The Korean Institute of Broadcast and Media Engineers
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Volume & Issues
Volume 19, Issue 6 - Nov 2014
Volume 19, Issue 5 - Sep 2014
Volume 19, Issue 4 - Jul 2014
Volume 19, Issue 3 - May 2014
Volume 19, Issue 2 - Mar 2014
Volume 19, Issue 1 - Jan 2014
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New Implementation and Test Methodology for Single Lens Stereoscopic 3D Camera System
Park, Sangil ; Yoo, Sunggeun ; Lee, Youngwha ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 569~577
DOI : 10.5909/JBE.2014.19.5.569
From the year 2009, 3D Stereoscopic movies and TV have been spotlighted after the huge success of a movie called "AVATAR". Moreover, most of 3D movies & contents are created by mixing real-life shots & virtual animated pictures, such as "Robocop 3", "Transformer 4" as shown in 2014. However, the stereoscopic 3D video film shooting with a traditional stereoscopic rig camera system, takes much more time to set the rig system and adjust the system setting for proper film making which necessarily resulting in bigger cost. In fact, these problems have depreciated the success of Avatar as decreasing demand for 3D stereoscopic video shooting. In this paper, inherent problems of traditional stereoscopic rig camera system are analyzed, and as a solution for the problems, a novel implementations of single-lens optical stereoscopic 3D camera system is suggested. The new system can be implemented to a technology for separating two lights when even those lights passing through in the same optical axis. The system has advantages of adjusting the setting and taking video compared with traditional stereoscopic 3D rig systems. Furthermore, this system can acquire comfortable 3D stereoscopic video because of the good characteristics of geometrical errors. This paper will be discussed the single-lens stereoscopic 3D camera system using rolling shutters, it will be tested geometrical errors of this system. Lastly, other types of single lens stereoscopic 3D camera system are discussed to develop the promising future of this system.
Subimage Detection of Window Image Using AdaBoost
Gil, Jong In ; Kim, Manbae ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 578~589
DOI : 10.5909/JBE.2014.19.5.578
Window image is displayed through a monitor screen when we execute the application programs on the computer. This includes webpage, video player and a number of applications. The webpage delivers a variety of information by various types in comparison with other application. Unlike a natural image captured from a camera, the window image like a webpage includes diverse components such as text, logo, icon, subimage and so on. Each component delivers various types of information to users. However, the components with different characteristic need to be divided locally, because text and image are served by various type. In this paper, we divide window images into many sub blocks, and classify each divided region into background, text and subimage. The detected subimages can be applied into 2D-to-3D conversion, image retrieval, image browsing and so forth. There are many subimage classification methods. In this paper, we utilize AdaBoost for verifying that the machine learning-based algorithm can be efficient for subimage detection. In the experiment, we showed that the subimage detection ratio is 93.4 % and false alarm is 13 %.
System Architecture for Digital Hologram Video Service
Lee, Yoon-Hyuk ; Seo, Young-Ho ; Kim, Dong-Wook ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 590~605
DOI : 10.5909/JBE.2014.19.5.590
The purpose of this paper is to propose a service system for a digital hologram video, which has not been published yet. This system assumes the existing service framework for 2-dimensional or 3-dimensional image/video, which includes data acquisition, processing, transmission, reception, and reconstruction. This system includes acquisition of color and depth image pairs from a image acquisition system with vertical rigs, rectification of acquired image pairs and generating digital hologram. Also it is designed to reduce the CGH (computer-generated hologram) generation time to 1/3. It also includes some additional and optional functions such as watermarking, compression, and encryption.
Hologram Watermarking Using Fresnel Diffraction Model
Lee, Yoon-Hyuk ; Seo, Young-Ho ; Kim, Dong-Wook ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 606~615
DOI : 10.5909/JBE.2014.19.5.606
This paper is to propose an algorithm for digital hologram watermarking by using a characteristic of the Fresnel diffraction model in 2D image. When 2D image is applied Fresnel transform, the result concentrates center region. When applied to a hologram, on the other hand, the result focused diffraction pattern of 2D form. Using this characteristic, to generate diffraction model by applying 2-th Fresnel transform to the hologram. Corner of diffraction model is mark space. This mark space is embedded watermark and extracted watermark. Experimental results showed that all the extracted watermarks after several kinds of attacks (Gaussian blurring, Sharpening, JPEG compression) showed visibilities good enough to be recognized to insist the ownership of the hologram.
Stereo-To-Multiview Conversion System Using FPGA and GPU Device
Shin, Hong-Chang ; Lee, Jinwhan ; Lee, Gwangsoon ; Hur, Namho ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 616~626
DOI : 10.5909/JBE.2014.19.5.616
In this paper, we introduce a real-time stereo-to-multiview conversion system using FPGA and GPU. The system is based on two different devices so that it consists of two major blocks. The first block is a disparity estimation block that is implemented on FPGA. In this block, each disparity map of stereoscopic video is estimated by DP(dynamic programming)-based stereo matching. And then the estimated disparity maps are refined by post-processing. The refined disparity map is transferred to the GPU device through USB 3.0 and PCI-express interfaces. Stereoscopic video is also transferred to the GPU device. These data are used to render arbitrary number of virtual views in next block. In the second block, disparity-based view interpolation is performed to generate virtual multi-view video. As a final step, all generated views have to be re-arranged into a single image at full resolution for presenting on the target autostereoscopic 3D display. All these steps of the second block are performed in parallel on the GPU device.
An Early Termination Algorithm of Prediction Unit (PU) Search for Fast HEVC Encoding
Kim, Jae-Wook ; Kim, Dong-Hyun ; Kim, Jae-Gon ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 627~630
DOI : 10.5909/JBE.2014.19.5.627
The latest video coding standard, high efficiency video coding (HEVC) achieves high coding efficiency by employing a quadtree-based coding unit (CU) block partitioning structure which allows recursive splitting into four equally sized blocks. At each depth level, each CU is partitioned into variable sized blocks of prediction units (PUs). However, the determination of the best CU partition for each coding tree unit (CTU) and the best PU mode for each CU causes a dramatic increase in computational complexity. To reduce such computational complexity, we propose a fast PU decision algorithm that early terminates PU search. The proposed method skips the computation of R-D cost for certain PU modes in the current CU based on the best mode and the rate-distortion (RD) cost of the upper depth CU. Experimental results show that the proposed method reduces the computational complexity of HM12.0 to 18.1% with only 0.2% increases in BD-rate.
Metadata Management System Implementation for Object-oriented Personalized Media Service based on Multiple Camera
Byun, Sung-Woo ; Lee, So-Min ; Lee, Seok-Pil ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 631~639
DOI : 10.5909/JBE.2014.19.5.631
Since digital broadcasting service has been begun, user's requirements have been increased for personalized broadcasting system that users can watch the part of programs which they want to watch in anytime. In personalized broadcasting system, metadata is important for searching program information based on user's input data. In this paper, an object-oriented media service metadata management module is implemented. Metadata used in this system is described by extending TV-Anytime specifications which is the International standard for personalized media service. For this, extended segments information is provided including object information which do not existing in previous personalized broadcasting standard. This system can provide better satisfaction to users by using object segmentation information.
HEVC Encoder Optimization using Depth Information
Lee, Yoon Jin ; Bae, Dong In ; Park, Gwang Hoon ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 640~655
DOI : 10.5909/JBE.2014.19.5.640
Many of today's video systems have additional depth camera to provide extra features such as 3D support. Thanks to these changes made in multimedia system, it is now much easier to obtain depth information of the video. Depth information can be used in various areas such as object classification, background area recognition, and so on. With depth information, we can achieve even higher coding efficiency compared to only using conventional method. Thus, in this paper, we propose the 2D video coding algorithm which uses depth information on top of the next generation 2D video codec HEVC. Background area can be recognized with depth information and by performing HEVC with it, coding complexity can be reduced. If current CU is background area, we propose the following three methods, 1) Earlier stop split structure of CU with PU SKIP mode, 2) Limiting split structure of CU with CU information in temporal position, 3) Limiting the range of motion searching. We implement our proposal using HEVC HM 12.0 reference software. With these methods results shows that encoding complexity is reduced more than 40% with only 0.5% BD-Bitrate loss. Especially, in case of video acquired through the Kinect developed by Microsoft Corp., encoding complexity is reduced by max 53% without a loss of quality. So, it is expected that these techniques can apply real-time online communication, mobile or handheld video service and so on.
Reduction of Block Artifacts in Haze Image and Evaluation using Disparity Map
Kwon, Oh-Seol ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 656~664
DOI : 10.5909/JBE.2014.19.5.656
In the case of a haze image, transferring the information of the original image is difficult as the contrast leans toward bright regions. Thus, dehazing algorithms have become an important area of study. Normally, since it is hard to obtain a haze-free image, the output image is qualitatively analyzed to test the performance of an algorithm. However, this paper proposes a quantitative error comparison based on reproducing the haze image using a disparity map. In addition, a Hidden Random Markov Model and EM algorithm are used to remove any block artifacts. The performance of the proposed algorithm is confirmed using a variety of synthetic and natural images.
A Study on Learning Model of Connected Program between High School and University : Focus on Experiment of Information Technology Media Studies
Heo, Su-Mi ; Choi, Seong-Jin ; Park, Gooman ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 665~676
DOI : 10.5909/JBE.2014.19.5.665
As the Learning Model (offered major course) of the connected program between high school and college, we conducted a customized education model for second grade high school students with regard to IT. Being based on the latest major trend and practical training within a given period this model has derived the high level of interest and participation from the students. First of all, the first program has focused on the theory and practice. In case of the theory lecture, the new knowledge and practical experiences attracted students' interests. Secondly, the second program mainly consisted of practical training. The basic knowledge through first learning program enabled the students to follow the second course for advanced experiences as well as the variety of new technology. Finally, the survey and evaluation were carried out on the students who finished programs. Most of the students gave answers that both the theory classes and customized practical training were helpful in finding their major and career exploration. The Learning Model of the connected program between high school and college showed that it can be useful not only to extract students' potential ability and good talent but also for university selection and career choices.
3D Accuracy Analysis of Mobile Phone-based Stereo Images
Ahn, Heeran ; Kim, Jae-In ; Kim, Taejung ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 677~686
DOI : 10.5909/JBE.2014.19.5.677
This paper analyzes the 3D accuracy of stereo images captured from a mobile phone. For 3D accuracy evaluation, we have compared the accuracy result according to the amount of the convergence angle. In order to calculate the 3D model space coordinate of control points, we perform inner orientation, distortion correction and image geometry estimation. And the quantitative 3D accuracy was evaluated by transforming the 3D model space coordinate into the 3D object space coordinate. The result showed that relatively precise 3D information is generated in more than
convergence angle. Consequently, it is necessary to set up stereo model structure consisting adequate convergence angle as an measurement distance and a baseline distance for accurate 3D information generation. It is expected that the result would be used to stereoscopic 3D contents and 3D reconstruction from images captured by a mobile phone camera.
Design and Implementation of Hybrid Network Associated 3D Video Broadcasting System
Yun, Kugjin ; Cheong, Won-Sik ; Lee, Jinyoung ; Kim, Kyuheon ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 687~698
DOI : 10.5909/JBE.2014.19.5.687
ATSC is currently working on standardization of hybrid 3DTV broadcasting service in heterogenous network environment after completion of service-compatible 3DTV broadcasting service standard based on broadcasting channel. This paper proposes a convergence 3D video broadcasting method on broadcasting and IP network while guaranteeing a Full-HD 3D quality without degrading the image quality of legacy DTV. Specifically, this paper describes transmission of the 3D additional video using the ISO/IEC 23009-1 DASH, robust synchronization method under heterogenous network environments and system target decoder model for hybrid 3DTV receiver. Based on experimental results, we confirm that proposed technologies can be used as a core technology in the hybrid 3DTV standardization and a reference model for a development of hybrid 3DTV encoder and receiver.
Adaptive Search Range Decision for Accelerating GPU-based Integer-pel Motion Estimation in HEVC Encoders
Kim, Sangmin ; Lee, Dongkyu ; Sim, Dong-Gyu ; Oh, Seoung-Jun ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 699~712
DOI : 10.5909/JBE.2014.19.5.699
In this paper, we propose a new Adaptive Search Range (ASR) decision algorithm for accelerating GPU-based Integer-pel Motion Estimation (IME) of High Efficiency Video Coding (HEVC). For deciding the ASR, we classify a frame into two models using Motion Vector Differences (MVDs) then adaptively decide the search ranges of each model. In order to apply the proposed algorithm to the GPU-based ME process, starting points of the ME are decided using only temporal Motion Vectors (MVs). The CPU decides the ASR as well as the starting points and transfers them to the GPU. Then, the GPU performs the integer-pel ME. The proposed algorithm reduces the total encoding time by 37.9% with BD-rate increase of 1.1% and yields 951.2 times faster ME against the CPU-based anchor. In addition, the proposed algorithm achieves the time reduction of 57.5% in the ME running time with the negligible coding loss of 0.6%, compared with the simple GPU-based ME without ASR decision.
Performance Analysis of 3D-HEVC Video Coding
Park, Daemin ; Choi, Haechul ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 713~725
DOI : 10.5909/JBE.2014.19.5.713
Multi-view and 3D video technologies for a next generation video service are widely studied. These technologies can make users feel realistic experience as supporting various views. Because acquisition and transmission of a large number of views require a high cost, main challenges for multi-view and 3D video include view synthesis, video coding, and depth coding. Recently, JCT-3V (joint collaborative team on 3D video coding extension development) has being developed a new standard for multi-view and 3D video. In this paper, major tools adopted in this standard are introduced and evaluated in terms of coding efficiency and complexity. This performance analysis would be helpful for the development of a fast 3D video encoder as well as a new 3D video coding algorithm.
Analysis of Signal Integrity of High Speed Serial Interface for Ultra High Definition Video Pattern Control Signal Generator
Son, Hui-Bae ; Kweon, Oh-Keun ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 726~735
DOI : 10.5909/JBE.2014.19.5.726
In accordance with 4K UHD(Ultra High Definition) LCD television's higher resolution and data expansion, LCD TV had to face problems such as increasing numbers of cables and tangible skews problems among cables. The V-by-One HS is a new interface technology in the path between the image processing IC and timing control (TCON) board. The variable speed from 600 Mbps to 3.75 Gbps effectively meets the requirements of various different pixel rates. In this paper, we use the V-by-One HS interface to illustrate our proposed simulation method of frequency resonance mode and PCB design approach to model the effects of signal integrity for high speed video signal using an IBIS models.
Metadata Design and Verification Test Bed System for Augmented Broadcasting
Choi, Bumsuk ; Kim, Suncheol ; Jeong, Youngho ; Hong, Jinwoo ; Lee, Wondon ;
Journal of Broadcast Engineering, volume 19, issue 5, 2014, Pages 736~745
DOI : 10.5909/JBE.2014.19.5.736
In this paper we introduce augmented broadcasting service scenarios which combines augmented reality service with broadcasting environment. As the broadcasting environment is different from mobile service environment, there are many restrictions in developing full AR services in TV. However TV has strong benefit of large screen, high quality contents, advanced user interface for motion and voice, and smart TV applications, which means that they will enhance the possibility of success for augmented broadcasting service. This paper proposes metadata structure containing information for augmentation region, time, augmented contents, and registration information for natural composition. We also implemented test bed system comprised of authoring server, broadcasting server, and user terminal for verifying metadata in broadcasting system.