• Proceedings of the Korean Society of Computer Information Conference
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• 2012.01a
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• pp.91-94
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• 2012

융합 시스템의 표본으로 주목받고 있는 IPTV는 라디오 전파 방송이 아닌 인터넷을 통하여 사용자들에게 멀티미디어 콘텐츠를 제공한다. IPTV 응용 분야에는 VOD(Video On Demand) 서비스, 교육, 문화, 오락 등 다양한 양방향 응용 서비스가 포함된다. 본 연구에서는 이러한 IPTV 시스템을 페트리 넷으로 표현하고, CPNTools를 이용하여 페트리 넷을 분석함으로써 IPTV 시스템이 막힘없이 운행됨을 검증한다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.35 no.4B
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• pp.713-720
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• 2010

Lately, IPTV is in the limelight using a broadband information service to provide video content and broadcast services. Current IPTV system is combining CAS and DRM system for VOD contents to protect transmitting contents and authentication, but it has drawbacks such as system's complexity and high construction costs. Multicast DRM system emerged as a method to improve them, but, in the multicast DRM system, if the key is intercepted by a malicious user, it can be viewed by an unauthorized user of illegal broadcasting which can be a problem. In this paper, we suggest to protect content from a malicious user by applying the techniques using user authentication in the multicast DRM system.

• Journal of Broadcast Engineering
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• v.17 no.2
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• pp.295-304
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• 2012

IPTV current service change from a TV IPTV service providing digital broadcast, one- way VOD service, terrestrial broadcast to a web IPTV service,which is using wireless networks which is also used by interactive digital broadcasting However, IPTV, is being currently serviced, causes a lot of interaction with viewers because of inconvenience of using and has problems that users do not have enough content type to access. Additionally, there is also a problem that adding contents cover a large part of screen. To solve these problems, the thing that adding QR code to IPTV screen being recognized by Smartphone. In this way, we can provide the idea how to access to interaction information and also provide to clients an easy way creating and accessing to the contents by developing an editor that can insert QR code to video.

• Journal of The Korean Association of Information Education
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• v.14 no.4
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• pp.489-496
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• 2010

Since the specifications of public services in broadcasting-telecommunication convergence environment are not standardized, the public services should be developed and presented by each IPTV service provider, and therefore it is worried that public organizations and IPTV service providers may invest in the public services redundantly, which are managed inefficiently. To resolve those problem, in this paper, the service and network interfaces among multiple public organizations and multiple IPTV service providers and the interactive VOD-type public service providing system of one source multi-use based on ACAP-J are proposed. The proposed system can be utilized in the standard platform of the evolved new public services. And the used technologies can be utilized as a guide for the development of new services.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.6
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• pp.631-636
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• 2010

With the growing trends of communication- broadcasting convergence, a hybrid IPTV that supports both IP network-based on-demand media and terrestrial or cable-based broadcast media is gaining attraction. This paper proposes a rich media framework for hybrid IPTV with support of the latest H.264 codec. For this purpose, we design and implement a media component and a RIA run-time engine customized for TV with the hybrid media. The media component has been designed to provide a uniform and efficient application interface to the various playback methods for RF broadcast and IP-based stored or live media. For performance and portability, it exploits media stream abstraction, adaptive on-demand I-frame search, and automatic calculation of play duration. Based on the proposed media interface, we develop a RIA run-time prototype. It has been carefully designed to fully utilize the built-in graphic acceleration hardware for optimized rendering in the resource-constrained IPTV environments. Demonstration and experiment results validate the performance and usefulness of the developed framework. The framework is expected to be used effectively to support graphics and hybrid media in the applications of IPTV-based VOD, advertisement, and education.

• The Journal of the Korea Contents Association
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• v.8 no.10
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• pp.95-103
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• 2008

Hana TV and Mega TV have been growing rapidly with IP-VOD service. The number of subscribers of both of them were 1.4 million in April 2008. Additionally, the change of viewing patterns of IPTV subscribers was predicted. Therefore, the purpose of this paper is to see how the subscribers use IP-VOD service practically. For this research, the frequency, the time and the duration of connection by genre have been analyzed on the March of 2007 and 2008. According to the result, there was a significant change quantitatively: within a year, not only the number of subscribers has doubled, but also the frequency of monthly connection has been increased 15 times. In addition, the duration of viewing per person has quadrupled. Regarding to the contents, the subscribers still prefer to watch free TV programs. However, the viewers have their own way of consuming TV programs. It has been proved that IPTV is a complementary media of free TV with a strong possibility to change the viewing patterns in the near future.

• Journal of the Korea Computer Industry Society
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• v.9 no.2
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• pp.53-62
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• 2008

Intensive studies have been made in the area of IPTV VOD server. The basic goal of the study is to find an efficient mechanism to allow maximum number of users under the limited resources such as Buffer utilization, disk performance and network bandwidth. The overlay multicast that has been recently presented as an alternative for the IP multicast has been getting much persuasion by the system resource and the network bandwidth and the advancement of the network cost. we propose a efficient overlay multi_casting network policy for multimedia services with multi media partition storage. Simulation results show that the rate of service number and service time of proposed scheme are about 23% performance improved than that of traditional methods. This implies that our method can allow much more users for given resources.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2009.11a
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• pp.357-360
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• 2009

2008년 IPTV를 시작으로 IP망을 통한 서비스가 본격적으로 시작되었으나 VOD 전송에 있어 대부분의 서비스가 On-demand 형태로 원하는 것을 찾아가서 시청 및 다운로드 받는 형태였다. 시청자 편의와 네트워크의 효율적인 활용을 위해 RSS(Really Simple Syndication)를 활용하여 CE-HTML(Consumer Electronics-HTML)이 탑재된 DTV수신기에 VOD를 전송하는 방법을 소개한다. 본 논문에서는 제안한 전송 기술을 이용하여 시청자는 CE-HTML 브라우저로 RSS 주소를 다운받아 저장하고 삭제하며 DTV 수신기에 설치된 RSS Application 은 저장된 RSS 주소를 활용하여 주기적으로 VOD 데이터를 가져간다. 시청자는 자신이 원하는 VOD가 다운로드 되면 시청한다. 인터넷을 효율적으로 활용하여 DTV 수신기에 풍부한 VOD 서비스를 제공할 수 있는 기술을 제안한다.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.26 no.3
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• pp.701-712
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• 2016

The number of subscriber of digital pay TV service such as Digital Cable TV and IPTV is increasing from various kind of service provider world widely. These services require personal information of users to provide VOD(Video on Demand) and customized contents. Therefore, massive amount of personal information collected by service provider can cause social confusion such as leakage of privacy and property damage. This paper investigates whether broadcasting stations are providing enough notification for privacy policy and methodology of collecting private information in proper way. Furthermore, we analyze actual network traffic of IPTV service between user and service provider to suggest solution of privacy protection along with current status analysis.

• Journal of the Korea Convergence Society
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• v.9 no.11
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• pp.237-244
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• 2018

This paper deals with the viewer's recognition of diversity on digital media services. For this reason, the researcher focused on the IPTV user, how the perception of the diversity of the digital media service affected the user's satisfaction. The results are as follows. First, digital media service user recognized that supply side diversity of media channel and VOD affect recognition of accessibility (easy of use) and perceived playfulness. Second user recognized that variety of performers and actors affect recognition of accessibility and perceived playfulness. Moreover, it was found that recognition of accessibility, actor's diversity, perceived playfulness affect use's recognition for media player's contribution of diversity, and media satisfaction. As in this paper, the researcher expects that this kind of methodology for confirming of user's recognition of diversity will contribute to preparing a future media policy.