• Journal of the Korean Professional Engineers Association
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• v.43 no.2
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• pp.39-44
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• 2010

Digital broadcast in Korea being under way for almost 10 years and due by the end of 2012 is greatly changing the style of life. Having such a potential impact on life means it hardly permits any mistake in cooperated works of viewers, broadcasters, manufacturers and government for smooth transition. Now the early phase of digital transition is capturing the viewers with unseen features like HDTV, interactive data broadcasting, and multimedia service. But what will really thrill us is still to come with its capability far beyond high definition and interactivity.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1999.06a
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• pp.1-10
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• 1999

A new digital media ear started a couple of months ago when 10 major cities in USA first boradcasted the all digital HDTV on the air. Digital video compression has been studied for decades but only recently, it becomes practical and is used in our daily life. We give an overview of the progress of video compression in recent years, particularly, the ones related to international standards. Through examples, we like to introduce this fantastic subject to the readers who were not familiar with it before.

• Proceedings of the Korea Contents Association Conference
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• 2007.11a
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• pp.687-690
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• 2007

The environment of digital broadcast which represents as multi-channel and multimedia provides more crisis and pressure to newspapermen called as an uncrowned monarch in region of the press. The circulation of newspaper is declining dramatically and newspaper companies are turning their attention into digital broadcast in order to survive. Furthermore, besides of Chosun, Jung-Ang and Dong-A which are the three major newspapers in S. Korea, local newspaper companies are suffering from severe financial difficulties. However it could be an opportunity for digital broadcasters who undergo the lack of contents whether they are qualitative or quantitative. For the purpose of this study, it is to present a number of strategic approach in order that local newspapers outlast in the competitive digital broadcasting marketplace. Beyond the localism it intends to discuss about tapping into valuable newspaper contents as on-line journalism.

• Journal of Broadcast Engineering
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• v.9 no.4 s.25
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• pp.371-383
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• 2004

In this paper we consider technological requirements to broadcast digital television signals using single frequency networks (SFN) in the Advanced Television Systems Committee (ATSC) transmission systems and propose equalization digital on-channel repeater (EDOCR) that overcomes the limitations of conventional digital on-channel repeaters (DOCRs). Since there are no forward error correction (FEC) decoder and encoder, the EDOCR does not have an ambiguity problem. In addition, since an adaptive equalizer in the EDOCR removes multi-path signals, additive white Gaussian noise (A WGN), and feedback signal due to low antenna isolation, the EDOCR may have good output signal quality with high power.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.01a
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• pp.508-511
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• 2009

The infringement of the copyright is a problem by the distribution of digital contents copied illegally. The digital watermark is expected as a thing preventing unjust copying by burying information in digital data such as image, animation, the sound, TV, radio and movies. [1] [2]But a noise is included in a digital watermark reproduction image. So there is the case that the certification of the reproduction image has difficulty with. If a computer cannot recognize the information reproduced from digital watermarking, the information does not have a meaning. This paper aimed at improvement of the proof of a digital-watermarking reproduction image. And it is verified whether the difference of the form of a character affects the degree of correlation.

• Proceedings of the KAIS Fall Conference
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• 2006.05a
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• pp.327-329
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• 2006

In this paper, PLC program for flowing type steam boiler control is presented. The function of the implementation are flowing type steam boiler, PLC control, interpretation of PLC command, and temperature scheme. The flowing type steam boiler approach is based on master-slave control concept. To show validity of the developed PLC program, severial experiments are illustrated.

• Journal of Digital Convergence
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• v.15 no.1
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• pp.45-52
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• 2017

According to the change in media environment, a support plan for local broadcast has been required. In terms of legal and institutional support for the development of local broadcast, the enactment of special Act for local broadcast has become a breakthrough. In this point of view, we analyzed the performance and the limitation of the special Act. As a literature research, analyzing the literature and related-ordinances, we have sought legal and institutional support plans for the local broadcast. As a result, with the Local Broadcast Development Council being in charge of legislative right and responsibility, a plan to empower them to have legal and institutional authority should be drawn; another plan to secure independence in operating a fund and to promote the capability to produce local broadcast programs and the distribution system should be drawn; the other elaborate plan for the locality index that assesses the locality is required. Local broadcast should be on a way to secure not only public interest and concern but locality and diversity; legal and institutional plans should be sought.

• Journal of Digital Convergence
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• v.12 no.5
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• pp.501-515
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• 2014

The enforcement of the digital switch been two years, but more than half of the viewers are still not enjoying the benefits of it. Therefore, the government proposed that 8VSB transmission method so that majority of the viewer is able to enjoy the benefits of a digital switch. However, the claim has been suggested that 8VSB transmission method will have negative impacts on broadcast market feedback. In this regard, this study verified the effect of 8VSB and the method of minimization on the broadcast market. This study has conducted in-depth interviews concerned experts to achieve this purpose. Results of an interview revealed that the negative impact on the market of content and platforms, network is very small. In other words, the majority of the experts argued that the policy of government about 8VSB transmission are inadequate and it is improved to broaden the choice of the broadcast consumer.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2003.11a
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• pp.83-86
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• 2003

With the opening of digital broadcast services and development of wire/wireless Internet, the current multimedia broadcasting is provided for has various services. The user will be provided lots of various content through the various channel and media. Content provider and consumer want the various service using content with the better quality which is fit to user preference. For transmitting this content in the limited transmission channel capacity, it needs to transmit the highly compressed content which user wants. The content of 3D mesh model-based on MPEG-4 enables the various content service that provides the lower capacity and the better quality, and Targeting service enables just provide the contents that user more wants and likes. The adaption of Java application program and 3D program can provide the content service utilizing 3D mesh model, so content provider and consumer can share the more information about the content. This paper has presented the study on the targeting service using compression of 3D mesh model-based on MPEG-4 and the adaptation of Java application program using it

• Journal of Korea Society of Digital Industry and Information Management
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• v.18 no.2
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• pp.1-8
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• 2022

The message propagation between vehicles must be efficiently performed to quickly transmit information between vehicles in vehicle ad hoc networks (VANETs). Broadcasting can be the most effective solution for propagating these messages. However, broadcasting can cause broadcast storm problems, which can reduce the performance of the overall network. Therefore, rapid information delivery in VANET requires a method that can propagate messages quickly without causing the broadcast storm problems. This paper proposes a lightweight and opportunistic broadcast (LOB) protocol that leverages the features of opportunistic routing to propagate messages quickly while minimizing the load on the network in VANETs where the network topology changes frequently. LOB does not require any routing information like greedy forwarding scheme, and neighboring nodes at the farthest distance within the range of transmission nodes are likely to be selected as forwarding nodes, and multiple forwarding candidate nodes like opportunistic routing scheme can increase packet transmission rates. Simulation results using ns-2 showed that LOB outperformed existing broadcast protocols in terms of packet rate and packet delay.