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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Journal of Broadcast Engineering
Journal Basic Information
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
Selecting the target year
A Study of Development of Transmission Systems for Next-generation Terrestrial 4K UHD & HD Convergence Broadcasting
Oh, JongGyu ; Won, YongJu ; Lee, JinSub ; Kim, YongHwan ; Paik, JongHo ; Kim, JoonTae ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 767~788
DOI : 10.5909/JBE.2014.19.6.767
The worldwide transition from analog to digital broadcasting has now been completed and the need to study next generation standards for Ultra High Definition TV (UHDTV) broadcasting, and broadcasting & communication convergence systems is rapidly growing. In particular, high resolution mobile broadcasting services are needed to satisfy recent consumers. Therefore, the development of highly efficient convergence broadcasting systems that provide fixed/mobile broadcasting through a single channel is needed. In this paper, a service scenario and requirements for providing 4K UHD & HD convergence broadcasting services through a terrestrial single channel are analyzed by employing the latest transmission and A/V codec technologies. Optimized transmission parameters for 6 MHz & 8 MHz terrestrial bandwidths are drawn, and receiving performances are measured under Additive White Gaussian Noise (AWGN) and time-varying multipath channels. From the results, in a 6 MHz bandwidth, the reliable receiving of HD layer data can be achieved when the receiver velocity is maximum 140 Km/h and is not achieved when the velocity is over 140 Km/h due to the limit of bandwidth. When the bandwidth is extended to 8 MHz, the reliable receiving of both 4K UHD and HD layer data is achieved under a very fast fading multipath channel.
Improved Side-by-Side 3D Reconstruct Method Considering Interlaced Characteristic
Kim, Jisu ; Jeong, Jechang ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 789~797
DOI : 10.5909/JBE.2014.19.6.789
In general, the image of interlaced side-by-side (SBS) streams is not good because it goes through two reconstruction steps-de-interlacing and horizontal interpolation. Especially the accuracy of horizontal resolution is greatly deteriorated as processed de-interlacing value is used for reference of interpolated pixel at time of horizontal interpolation. To solve this problem, we propose an improved method considering interlaced SBS stream's characteristics. In this paper, we adopted two separate methods to transmitted line and blank line for using reliable information. The experimental result of the proposed method is better than the conventional algorithm in terms of subjective and objective image quality.
Regional Projection Histogram Matching and Linear Regression based Video Stabilization for a Moving Vehicle
Heo, Yu-Jung ; Choi, Min-Kook ; Lee, Hyun-Gyu ; Lee, Sang-Chul ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 798~809
DOI : 10.5909/JBE.2014.19.6.798
Video stabilization is performed to remove unexpected shaky and irregular motion from a video. It is often used as preprocessing for robust feature tracking and matching in video. Typical video stabilization algorithms are developed to compensate motion from surveillance video or outdoor recordings that are captured by a hand-help camera. However, since the vehicle video contains rapid change of motion and local features, typical video stabilization algorithms are hard to be applied as it is. In this paper, we propose a novel approach to compensate shaky and irregular motion in vehicle video using linear regression model and vertical projection histogram matching. Towards this goal, we perform vertical projection histogram matching at each sub region of an input frame, and then we generate linear regression model to extract vertical translation and rotation parameters with estimated regional vertical movement vector. Multiple binarization with sub-region analysis for generating the linear regression model is effective to typical recording environments where occur rapid change of motion and local features. We demonstrated the effectiveness of our approach on blackbox videos and showed that employing the linear regression model achieved robust estimation of motion parameters and generated stabilized video in full automatic manner.
Implementation of Stereophonic Sound System Using Multiple Smartphones
Kim, Ki-Jun ; Myeong, Chang-Ho ; Park, Hochong ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 810~818
DOI : 10.5909/JBE.2014.19.6.810
In this paper, we propose a stereophonic sound system using multiple smartphones. In the conventional sound systems using smartphones, all devices play the same signal so that it is difficult to provide true stereophonic effect. In order to solve this problem, we propose a novel sound system which can generate a virtual sound source at any location in such a way that smartphones at different locations play different signals with amplitude panning. By using the proposed system, we can generate more realistic stereophonic effect than the conventional system, and can control the sound effect by user's command. We developed the proposed system using commercial smartphones and verified that the developed sound system effectively provides the desired stereophonic effect.
Online Monaural Ambient Sound Extraction based on Nonnegative Matrix Factorization Method for Audio Contents
Lee, Seokjin ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 819~825
DOI : 10.5909/JBE.2014.19.6.819
In this paper, monaural ambient component extraction algorithm based on nonnegative matrix factorization (NMF) is described. The ambience component extraction algorithm in this paper is developed for audio upmixing system; Recent researches have shown that they can enhance listener envelopment if the extracted ambient signal is applied into the multichannel audio upmixing system. However, the conventional method stores all of the audio signal and processes all at once, so it cannot be applied to streaming system and digital signal processor (DSP) system. In this paper, the ambient component extraction algorithm based on on-line nonnegative matrix factorization is developed and evaluated to solve the problem. As a result of analysis of the processed signal with spectral flatness measures in the experiment, it was shown that the developed system can extract the ambient signal similarly with the conventional batch process system.
Performance Analysis of Spatial Modulation Schemes in Correlated Urban Wireless Communication Channels
Jo, Bonggyun ; Han, Dong Seog ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 826~835
DOI : 10.5909/JBE.2014.19.6.826
Recently, spatial modulation (SM) schemes are considered to improve the reception performance in spatially correlated channel environments. SM schemes utilize a switching method between multiple transmitters to reduce the correlation among multiple transmitters to reduce the correlation of each received signals and can support transmission additional bits using antenna combinations without extra bandwidth. Therefore, SM schemes can overcome correlation interference of conventional MIMO in urban wireless channels. However, the performance comparisons between SM schemes are not yet performed in correlated urban wireless channels. In this paper, some representative SM schemes are compared and a suitable SM-MIMO system in correlated urban wireless channels is proposed.
Scheme for Reducing HEVC Intra Coding Complexity Considering Video Resolution and Quantization Parameter
Lee, Hong-Rae ; Seo, Kwang-Deok ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 836~846
DOI : 10.5909/JBE.2014.19.6.836
To expedite UHD (Ultra High Definition) video service, the HEVC (High-Efficiency Video Coding) technology has recently been standardized and it achieves two times higher compression efficiency than the conventional H.264/AVC. To obtain the improved efficiency, however, it employs many complex methods which need complicated calculation, thereby resulting in a significantly increased computational complexity when compared to that of H.264/AVC. For example, to improve the coding efficiency of intra frame coding, up to 35 intra prediction modes are defined in HEVC, but this results in an increased encoding time than the H.264/AVC. In this paper, we propose a fast intra prediction mode decision scheme which reduces computational complexity by changing the number of intra prediction mode in accordance with the percentage of PU sizes for a given video resolution, and by classifying the 35 intra prediction modes into 4 categories considering video resolution and quantization parameter. The experimental results show that the total encoding time is reduced by about 7% on average at the cost of only 2% increase in BD-rate.
Study of CAP Profile Requirement for Emergency Alert System in Korea
Kim, Jihee ; Ahn, Soyoung ; Jeon, Inchan ; Lee, Yong Tae ; Choi, Seong Jong ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 847~853
DOI : 10.5909/JBE.2014.19.6.847
When a disaster occurs, effective alerts will reduce human life and property loss. The Integrated Emergency Alert System is a national disaster management system which integrates existing alert systems to deliver effective disaster alerts. Alert message exchange protocol is the essential technology for the System. In Korea, the first specification for "Common Alerting Protocol Profile for Integrated Emergency Alert System" was established in 2014. In this paper, we derive two additional requirements for more enhanced alert service and propose revision of the specification: multilingual alert service for foreigners and more flexible representation of target area. We review the associated foreign profile specifications as well as the domestic specifications to analyze these requirements. Finally, we propose the most efficient way to deliver multilingual alert message and to represent target area.
Arbitrary Viewpoint/Disparity Stereoscopic Image Generation from a Digital Hologram
Lee, Yoon-Hyuk ; Choi, Hyun-Jun ; Kim, Dong-Wook ; Seo, Young-Ho ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 854~865
DOI : 10.5909/JBE.2014.19.6.854
This paper proposes a method to generate a stereoscopic image pair from a digital hologram by considering the situation that digital hologram data is serviced but the end-user does not have the proper display equipment, etc. We use Fresnel transform as the method to convert a digital hologram into an image. Each image of the stereoscopic image pair uses a part of the given digital hologram and the sizes of the two partial digital holograms for the two images are chosen to be the same. Here, the size of the image is adjusted by the size of the partial digital hologram and the disparity between the pair images is adjusted by the distance between the centers of the two partial hologram. This paper also deals with how to adjust the size and the disparity of the images. In this paper the generated stereoscopic images are implemented as an anaglyphic display type to confirm the feeling of distance by wearing the red-blue glasses.
Real-Virtual Fusion Hologram Generation System using RGB-Depth Camera
Song, Joongseok ; Park, Jungsik ; Park, Hanhoon ; Park, Jong-Il ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 866~876
DOI : 10.5909/JBE.2014.19.6.866
Generating of digital hologram of video contents with computer graphics(CG) requires natural fusion of 3D information between real and virtual. In this paper, we propose the system which can fuse real-virtual 3D information naturally and fast generate the digital hologram of fused results using multiple-GPUs based computer-generated-hologram(CGH) computing part. The system calculates camera projection matrix of RGB-Depth camera, and estimates the 3D information of virtual object. The 3D information of virtual object from projection matrix and real space are transmitted to Z buffer, which can fuse the 3D information, naturally. The fused result in Z buffer is transmitted to multiple-GPUs based CGH computing part. In this part, the digital hologram of fused result can be calculated fast. In experiment, the 3D information of virtual object from proposed system has the mean relative error(MRE) about 0.5138% in relation to real 3D information. In other words, it has the about 99% high-accuracy. In addition, we verify that proposed system can fast generate the digital hologram of fused result by using multiple GPUs based CGH calculation.
The Effect of Matching between Odor and Color on Video Reality and Sense of Immersion
Lee, Guk-Hee ; Li, Hyung-Chul O. ; Bang, Dongmin ; Ahn, ChungHyun ; Ki, MyungSeok ; Kim, ShinWoo ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 877~895
DOI : 10.5909/JBE.2014.19.6.877
It is common sense that providing specific odor can increase the video reality when video scene has an object having specific odor. However, people still do not know how to increase video reality and emotional immersion when there is no information on specific odor in the scene. So, present study explores how we improve video reality and immersion when the scene has no concrete odor information from some objects. Especially, this research focuses on diverse previous studies about matching between odor and color and then we expect providing odor can increase video reality if the odor is well-matched with the video's color. To do this, we collected 48 odors and investigated which color was well-matched with each odor. As a result, we get 5 odors which had clearly well-matched colors and decide ill-matched colors of those 5 odors as complementary colors of well-matched colors (Experiment 1). After that, we organize 3 conditions such as coloring image and video clip with well-matched color (color-odor match condition), coloring those with ill-matched color (color-odor mismatch condition), and coloring those with achromatic color by removing color saturation (color-odor neutral condition). Under each of these three conditions, image-odor matching, increment of reality with the odor, increment of immersion with the odor, and odor preference are asked (Experiment 2; 3). The results showed that the scores of all 4 questions in color-odor match condition were higher than color-odor mismatch condition and neutral condition. These results mean that providing matching odor with the scene's color in video is very effective to increase video reality and immersion. We expect experiencing better reality and immersion with olfactory information by adding various future research.
A Real-time Dual-mode Temporal Synchronization and Compensation based on Reliability Measure in Stereoscopic Video
Kim, Giseok ; Cho, Jae-Soo ; Lee, Gwangsoon ; Lee, Eung-Don ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 896~906
DOI : 10.5909/JBE.2014.19.6.896
In this paper, a real-time dual-mode temporal synchronization and compensation method based on a new reliability measure in stereoscopic video is proposed. The goal of temporal alignment is to detect the temporal asynchrony and recover synchronization of the two video streams. The accuracy of the temporal synchronization algorithm depends on the 3DTV contents. In order to compensate the temporal synchronization error, it is necessary to judge whether the result of the temporal synchronization is reliable or not. Based on our recently developed temporal synchronization method, we define a new reliability measure for the result of the temporal synchronization method. Furthermore, we developed a dual-mode temporal synchronization method, which uses a usual texture matching method and the temporal spatiogram method. The new reliability measure is based on two distinctive features, a dynamic feature for scene change and a matching distinction feature. Various experimental results show the effectiveness of the proposed method. The proposed algorithms are evaluated and verified through an experimental system implemented for 3DTV.
A Study on Relationship between National Technology Licenses in ICT sectors and Job-Finding & Performance of Works
Yoo, Jae-Young ; Choi, Seong-Jin ; Lee, Yeong-Ju ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 907~915
DOI : 10.5909/JBE.2014.19.6.907
This paper is to assess the influence of business field and qualification acquisition on job-getting and working business by conducting survey against the qualification holders of the national technology in the area of ICT industry. The result shows that respondents working in the ICT industry are 58.7% of samples. Their working business are shown as manufacturing area of broadcasting & telecommunication, telecommunication service, science/technology service, and media service. As for the value of qualification, the current working business area of respondents is more influential factor than the types of qualification. Workers of media service industry recognize the qualifications more useful in job-getting and job performance.
Zoom Motion Estimation Method Using Variable Block-Size
Kwon, Soon-Kak ; Jang, Won-Seok ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 916~924
DOI : 10.5909/JBE.2014.19.6.916
It is possible to improve the accuracy of the motion estimation for a video by applying a variable block size. However, it has limits in the zoom motion estimation. In this paper, we propose a method for estimating the zoom motion with variable block size. The proposed method separates the background within the object picture by depth information obtained from a depth camera, and only the object regions are applied to zoom scale, but the background is not applied. In addition, the object regions select efficiently variable block size mode in consideration of the generated motion vectors and the accuracy of motion estimation at the same time. Simulation results show the accuracy of the motion estimation and the number of motion vectors for the proposed method. It is verified that the proposed method can reduce the number of motion while maintaining the similar accuracy of motion estimation than the conventional motion estimation methods.
The Impact of Watching Motives of Parenting Reality TV Program on User Satisfaction and Rewatching
Kim, Dong-Woo ; Lee, Yeong-Ju ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 925~933
DOI : 10.5909/JBE.2014.19.6.925
This study investigates the impact of watching motives of parenting reality TV Program,
(KBS2) on user satisfaction and rewatching. Viewing motives of parenting reality TV Program are found as 'interest', 'charm of children characters', 'relief of loneliness' and 'express everyday feelings'. The result shows that there is significant difference in watching time according to the factor of 'charm of children characters'. Also 'interest' and 'expression of everyday feelings' affect viewing satisfaction of viewers. It is necessary to plan interesting reality program and arrange attractive characters to improve viewing satisfaction of TV program.
The Characteristics Analysis of Low Profile Meander 2-Layer Monopole Antenna
Jang, Yong-Woong ; Lee, Sang-Woo ; Shin, Ho-Sub ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 934~941
DOI : 10.5909/JBE.2014.19.6.934
In this paper, we present a low profile 2-layered meander built-in monopole antenna for portable RFID reader using FDTD(Finite Difference Time Domain) method. The input impedance, return loss, and VSWR in the frequency domain are calculated by Fourier transforming the time domain results. The double meander 2-layer structure is used to enhance the impedance matching and increase the antenna gain. The measured bandwidth of the antenna is 0.895 GHz ~ 0.930 GHz for a S11 of less than -10dB. The measured peak gain of proposed low profile RFID built-in antenna is 2.3 dBi. And the proposed built-in antenna for portable RFID reader can offers relatively wide-bandwidth and high-gain characteristics, in respectively. Experimental data for the return loss and the gain of the antenna are also presented, and they are relatively in good agreement with the FDTD results. This antenna can be also applied to mobile communication field, energy fields, RFID, and home-network operations, broadcasting, and other low profile mobile systems.
RGB Camera-based Real-time 21 DoF Hand Pose Tracking
Choi, Junyeong ; Park, Jong-Il ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 942~956
DOI : 10.5909/JBE.2014.19.6.942
This paper proposes a real-time hand pose tracking method using a monocular RGB camera. Hand tracking has high ambiguity since a hand has a number of degrees of freedom. Thus, to reduce the ambiguity the proposed method adopts the step-by-step estimation scheme: a palm pose estimation, a finger yaw motion estimation, and a finger pitch motion estimation, which are performed in consecutive order. Assuming a hand to be a plane, the proposed method utilizes a planar hand model, which facilitates a hand model regeneration. The hand model regeneration modifies the hand model to fit a current user's hand, and improves robustness and accuracy of the tracking results. The proposed method can work in real-time and does not require GPU-based processing. Thus, it can be applied to various platforms including mobile devices such as Google Glass. The effectiveness and performance of the proposed method will be verified through various experiments.
Implementation of Advertising System for N-Screen Live Streaming Service
Choi, Yunjin ; Lee, Sanggil ; Jung, Byunghee ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 957~966
DOI : 10.5909/JBE.2014.19.6.957
N-Screen service has experienced rapid business expansion recently, since consumers' watching patterns have been diversified; also business stakeholders including broadcasting companies, internet service providers, and device manufacturers have joined this field. In order to operate N-Screen service in a stable manner, development of advertisement system where it generates continuous advertisement profit is needed. Especially for a streaming service that delivers live TV programs, the new advertising system has to deliver ads in conjunction with the live streaming system that is in use. In this paper, video advertising system that is congenial to N-Screen is proposed. Both real time video/ad converting scheme and direct video ads delivery function were developed and tested. In addition, ad contents management and statistics management functions have been developed for advertisement managers. This system was implemented in a commercial N-Screen service and it is currently being used for delivering video advertisements.
An Efficient Peak Detection Algorithm in Magnitude Spectrum for M-FSK Signal Classification
Ahn, Woo-Hyun ; Seo, Bo-Seok ;
Journal of Broadcast Engineering, volume 19, issue 6, 2014, Pages 967~970
DOI : 10.5909/JBE.2014.19.6.967
An efficient peak detection algorithm in magnitude spectrum is proposed to distinguish the M-frequency shift keying(FSK) signals from other digitally modulated signal. In addition, recognition of the modulation order estimation of FSK signals is also studied based on the fact that the magnitude spectrum of FSK signals reveals the number of peaks equal to the modulation order. When no a priori information about the signals, we utilize the histogram of the magnitude spectrum to determine the threshold which is important factor in peak detection algorithm. The simulation results show high probability of classification under 500 symbols and signal-to-noise ratio(SNR) higher than 4dB.