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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 20, Issue 6 - Nov 2015
Volume 20, Issue 5 - Sep 2015
Volume 20, Issue 4 - Jul 2015
Volume 20, Issue 3 - May 2015
Volume 20, Issue 2 - Mar 2015
Volume 20, Issue 1 - Jan 2015
Selecting the target year
Study on Improved Polarized 2˟2 MIMO Spatial Multiplexing Method for DVB-NGH System
Seo, Jae Hyun ; Kim, Heung Mook ; Han, Dong Seog ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 3~15
DOI : 10.5909/JBE.2015.20.1.3
Recently terrestrial digital broadcasting systems have experienced a growth with the demand of high data rate. In order to meet such demand, the MIMO technology has received a wide attention. This paper proposes a pre-coding method, which provides high space channel correlation for the improved performance over terrestrial broadcasting channels when the polarized
MIMO SM is adopted for DVB-NGH systems. When signals with two different modulation orders are transmitted through two antennas, a method that is based on non-uniform power is also proposed for improved reception performance. To optimize the proposed method, phase shifting values for the pre-coding method and appropriate unequal power ratio are obtained. These obtained parameters are applied to a terrestrial broadcasting system, and then the performance improvement over the conventional SM is shown through computer simulations.
Design of MMT-based Broadcasting System for UHD Video Streaming over Heterogeneous Networks
Sohn, YeJin ; Cho, MinJu ; Paik, JongHo ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 16~25
DOI : 10.5909/JBE.2015.20.1.16
Even if the demands for ultra-high-quality multimedia contents are increasing, it is difficult to produce, encode, play and transport ultra-high-quality contents under the existing broadcasting environment. By the reason, various technologies for the UHD contents have been developed in order to satisfy the user`s needs. In this paper, we propose a design methodology of a broadcasting system, which consists of two parts, for UHD services with two parts. At the transmit part of the proposed system can encode a video into several layered-bitstreams hierarchically, and then transport each bitstream over heterogeneous networks. The receiver part can play the received video by composing the separated bitstreams. The proposed system can adaptively provide both HD and UHD contents according to user`s reception conditions by using the heterogeneous networks.
Terrestrial 4K UHD Live Broadcasting of Sports
Cho, Injoon ; Hahm, Sangjin ; Kim, Sansung ; Kim, Byungsun ; Kim, Sanghoon ; Jeon, Sungho ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 26~39
DOI : 10.5909/JBE.2015.20.1.26
UHD (Ultra High Definition) has been developed and standardized over the past few years and considered as a key of the next generation broadcasting. Since major sporting events that attract many viewers have been good opportunities for applying and promoting new broadcasting technology, KBS (Korean Broadcasting System) has carried out live 4K terrestrial broadcasting of three big sports events in 2014, the KBL (Korean Basketball League) finals, the 2014 FIFA World Cup, and the 2014 Incheon Asian Games. Especially, 4K UHD live coverage of the KBL finals was the world`s first live 4K terrestrial broadcasting, and people could enjoy the World Cup and the Asian Games with UHDTV at home. In this paper, the overall live production and data transmission of the sporting events is described, including on-location live production, live HEVC (High Efficiency Video Coding) encoding, SFN (Single Frequency Network) transmission, as well as experimental IP transmission of uncompressed 4K video via KREONET, a national R&D network run by KISTI (Korea Institute of Science and Technology Information).
Adaptive QoS Study for Video Streaming Service In MMT Protocol
Jo, Bokyun ; Lee, Doohyun ; Suh, Doug Young ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 40~47
DOI : 10.5909/JBE.2015.20.1.40
This paper discusses QoS enhancement in the Best-effort services of the service plan provided by MPEG Media Transport (MMT) systems for video streaming applications. Among MMT services, i.e. per-flow, per-class, and best-effort services, the server does not provide guaranteed bandwidth for the best-effort service only. Therefore, in the best-effort services, a bandwidth access priority is defined for various services, where the lowest priority is assigned to the low-level video services. To alleviate the issue of bandwidth limitation in the best-effort services, this paper investigates transmission of low-resolution video with low bitrate and up-sampling. Our experimental results prove the superiority of the proposed method in terms of delivered video quality.
A Study on the Adoption of UHD for Users Perceived usefulness and ease of use of UHDTV
Lee, Mi-Ra ; Choi, Seong-Jin ; Lee, Yeong-Ju ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 48~56
DOI : 10.5909/JBE.2015.20.1.48
This study looks deep into how user`s individual personality and his or her media experiences affect perceived usefulness and perceived ease of use about UHDTV based on Technology Acceptance Model using survey methodology. This study also focuses on how the purchase intention of terminal equipments and the willingness to pay for UHD contents will make different choices. The result of this study shows that, whether user is an exhibitionist or not or has frequently encountered a big screen, these factors affect both the perceived usefulness and the perceived ease of use about UHDTV. When user is an exhibitionist with more experience with big screens, it was clear that user tended to choose UHDTV with higher perception of usefulness and ease of use about UHDTV. This study also implies that when supplying the next generation broadcasting service, it is needed to consider the users` perceived usefulness and ease of use about UHD as well as the individuals` media experiences and characteristics.
Intra Block Copy Analysis to Improve Coding Efficiency for HEVC Screen Content Coding
Ma, Jonghyun ; Ahn, Yong-Jo ; Sim, Donggyu ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 57~67
DOI : 10.5909/JBE.2015.20.1.57
This paper describes and analyzes IBC (intra block copy) in HEVC (high efficiency video coding) SCC (screen content coding) to improve the coding efficiency of IBC. HEVC SCC reference software SCM 2 is employed to analyze the selection ratio of IBC which is newly adopted in HEVC SCC, and the tools for IBC such as the block vector prediction and block vector coding method are evaluated. Experimental results show the average IBC selection ratio is 31.08% and 0.33% in I-Slice and B-Slice, respectively. Based on this results, the coding efficiency of IBC could be improved by utilizing IBC selectively. In addition, analysis tests of block vector prediction and the block vector coding method show the current methods are not efficient to screen content videos, and the analysis results are presented to improve these methods.
A Study on Realistic Sound Reproduction for UHDTV
Jang, Daeyoung ; Seo, Jeongil ; Lee, Yong Ju ; Yoo, Jae-Hyoun ; Park, Taejin ; Lee, Taejin ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 68~81
DOI : 10.5909/JBE.2015.20.1.68
Owing to the latest development of component and media processing technologies, UHDTV as a successor of the HDTV is expected that this will be coming soon realization. Accordingly, an audio technology that provides a 5.1-channel surround sound in home should be contemplating on what services should be provided with the advent of UHDTV era. In fact, however, the market of 5.1-channel audio is struggling, due to the difficulty of installation and maintenance of the multi speakers in a home. Meanwhile, the movie sound market for a long time been used in 5.1 and 7.1-channel sound formats, have changed as Dolby ATMOS, IOSONO, AURO3D etc. are launched one after another with the introduction of hybrid audio technologies that include the ceiling and object-based sounds. This very object-based audio technology is assured to be introduced in the home theater and broadcast audio market, and this change in audio technology is expected to be a breath of pioneering technological advances and market growth from the channel-based audio market that lacks flexibility. In this paper, we will investigate a suitable realistic audio solution for UHDTV, and introduce hybrid audio technologies, which is expected to be an audio technology for UHDTV, and we will describe the hybrid audio content format and reproduction methods in a home and consider the future prospects of realistic audio.
A study on the Frequency Allocation of Terrestrial UHDTV Broadcasting in 700MHz Band
Lee, Sang Woon ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 82~91
DOI : 10.5909/JBE.2015.20.1.82
The purpose of this paper is to propose the frequency allocation plan for the terrestrial UHDTV in 700MHz frequency band. Currently 700MHz frequency band is being requested by broadcasting, communication, and public safety sites for the use of UHDTV, LTE/LTE-A and PPDR (Public Protection and Disaster Relief) by each site. Validity and proper timing of each request is examined by references, and the frequency allocation plan is proposed. As results 9 channels and guard bands are allocated for the UHDTV service, under the consideration of two 10MHz frequency bands of the PPDR in700MHz band.
Broadcast Encryption System Using Secret Sharing and Subset Difference Methods
Lee, Jae Hwan ; Park, Jong Hwan ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 92~109
DOI : 10.5909/JBE.2015.20.1.92
Broadcast encryption is a cryptographic primitive that allows a sender to securely broadcast a message to a set of receivers. The most influential broadcast encryption system was proposed in 2001 by Naor, Naor, Lotspiech, based on a pseudo-random generator and the Subset Difference (SD) method. In this paper, we suggest a new broadcast encryption system that is based on secret sharing and SD methods. On an efficiency aspect, our system achieves O(r) transmission cost, O(
) storage cost, and O(1) computational cost for the number n of users and the number r of revoked users. Compared to O(log n) computational cost in the previous SD method, our system has the advantage that it needs only constant-sized computational cost for decryption, regardless of the number n or r. On a security aspect, our system can achieve tighter security reduction than the previous SD method and the gap of security loss is about O(n log n). Moreover, our result shows that it is possible to give the effect of the SD method while using an information-theoretically secure key distribution technique as in the Complete Subtree method.
User Interaction Library for Natural Science Education Digital App-Book on Android Platform
Lee, Kang-Woon ; Beak, A-Ram ; Choi, Haechul ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 110~121
DOI : 10.5909/JBE.2015.20.1.110
The digital app-book is an advanced form of the electronic book (e-book), which attracts a lot of interests by the help of video, sound, sensors and a variety of interactions. As mobile devices have evolved, the demand of digital app-books is also rising substantially. However, the distribution of digital app-book contents is hard to meet the demand because the digital app-book requires a lot of programming cost for the interaction. To resolve this problem, Was verified and implementation as a library function of the interaction between device and user. The proposed library consists of three parts (user action recognition, device action, and content action) and provides various user-device interaction functions by combining methods of each part, which can support source code reusability, easy understanding and availability, and wide expandibility. The library was used in the development of natural science education app-book contents. As a result, it could reduce a lot of code lines and facilitate more rapid app-book development.
A Study on the Cognitive Differences and Issue Factors of Terrestrial Broadcasters on Transmission System Determinants of Digital Radio Broadcasting
Chae, Su-Hyun ; Lee, Yeong-Ju ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 122~139
DOI : 10.5909/JBE.2015.20.1.122
Though the digital transition of terrestrial TV has been completed, the transmission system for terrestrial radio has not been determined and terrestrial radio still keeps its analog transmission. This study, under coorientation model, aims to explore the cognitive difference in recognizing important factors to be considered in deciding the digital radio transmission system between the employees of terrestrial broadcasters and then crucial issues related to the factors are driven. It has been found that the most big cognitive difference among the employees of three major terrestrial broadcasters lies in selecting frequency band for digital radio transmission. But there was little difference of opinion on simultaneous production-transmission, efficiency of frequency usage, broadcast quality and standards of service. The most disputable point in transition to digital radio broadcasting is selecting the frequency band for digital radio between the frequency bands used for FM radio broadcast (88-108MHz), terrestrial DMB (VHF Ch7~13) and FM radio adjacent broadcast band (76~88MHz: VHF Ch5~6). So, the question concludes into the selection issue between DAB+, HD-Radio, and DRM+. To improve the quality of radio broadcasting service and enhance the satisfaction of listeners, it is desirable to allow to operate both production system and transmission station, to enhance high transmission efficiency with minimum transmission facility, and to permit new entrance of broadcasters.
W3C based Interoperable Multimodal Communicator
Park, Daemin ; Gwon, Daehyeok ; Choi, Jinhuyck ; Lee, Injae ; Choi, Haechul ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 140~152
DOI : 10.5909/JBE.2015.20.1.140
HCI(Human Computer Interaction) enables the interaction between people and computers by using a human-familiar interface called as Modality. Recently, to provide an optimal interface according to various devices and service environment, an advanced HCI method using multiple modalities is intensively studied. However, the multimodal interface has difficulties that modalities have different data formats and are hard to be cooperated efficiently. To solve this problem, a multimodal communicator is introduced, which is based on EMMA(Extensible Multimodal Annotation Markup language) and MMI(Multimodal Interaction Framework) of W3C(World Wide Web Consortium) standards. This standard based framework consisting of modality component, interaction manager, and presentation component makes multiple modalities interoperable and provides a wide expansion capability for other modalities. Experimental results show that the multimodal communicator is facilitated by using multiple modalities of eye tracking and gesture recognition for a map browsing scenario.
Rain Detection and Removal Algorithm using Motion-Compensated Non-local Means Filter for Video Sequences
Seo, Seung Ji ; Song, Byung Cheol ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 153~163
DOI : 10.5909/JBE.2015.20.1.153
This paper proposes a rain detection and removal algorithm that is robust against camera motion in video sequences. In detection part, the proposed algorithm initially detects possible rain streaks by using intensity properties and spatial properties. Then, the rain streak candidates are selected based on Gaussian distribution model. In removal part, a non-rain block matching algorithm is performed between adjacent frames to find similar blocks to the block that has rain pixels. If the similar blocks to the block are obtained, the rain region of the block is reconstructed by non-local means (NLM) filter using the similar neighbors. Experimental results show that the proposed algorithm outperforms the previous works in terms of subjective visual quality of de-rained video sequences.
Eigenvoice Adaptation of Classification Model for Binary Mask Estimation
Kim, Gibak ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 164~170
DOI : 10.5909/JBE.2015.20.1.164
This paper deals with the adaptation of classification model in the binary mask approach to suppress noise in the noisy environment. The binary mask estimation approach is known to improve speech intelligibility of noisy speech. However, the same type of noisy data for the test data should be included in the training data for building the classification model of binary mask estimation. The eigenvoice adaptation is applied to the noise-independent classification model and the adapted model is used as noise-dependent model. The results are reported in Hit rates and False alarm rates. The experimental results confirmed that the accuracy of classification is improved as the number of adaptation sentences increases.
Early Decision of Inter-prediction Modes in HEVC Encoder
Han, Woo-Jin ; Ahn, Joon-Hyung ; Lee, Jong-Ho ;
Journal of Broadcast Engineering, volume 20, issue 1, 2015, Pages 171~182
DOI : 10.5909/JBE.2015.20.1.171
HEVC can increase the coding efficiency significantly compared with H.264/AVC however it requires much larger computational complexities in both encoder and decoder. In this paper, the decision process of inter-prediction modes in the HEVC reference software has been studied and a fast algorithm to reduce the computational complexity of encoder and decoder is introduced. The proposed scheme introduces a early decision criteria using the outputs of uni-directional predictions to skip the bi-directional prediction estimation. From the experimental results, it was proven that the proposed method can reduce the encoding complexity by 12.0%, 14.6% and 17.2% with 0.6%, 1.0% and 1.5% of coding efficiency penalty, respectively. In addition, the ratio of bi-directional prediction mode was reduced by 6.3%, 11.8% and 16.6% at the same level of coding efficiency penalty, respectively, which should lead to the decoder complexity reduction. Finally, the effects of the proposed scheme are maintained regardless of the use of the early skip decision algorithm which is implemented in the HEVC reference software.