• Proceedings of the Korea Multimedia Society Conference
• /
• 2004.05a
• /
• pp.579-582
• /
• 2004

본 논문에서는 PDA 장치를 위한 MPEG-4 콘텐츠를 저작하기 위한 스케일링 방법을 제안한다. 제안하는 스케일링 방법은 저작시 MPEC-4 콘텐츠의 씬 트리를 이용하여 PDA 장치에서 재생할 수 있도록 mp4 파일를 재구성하는 방법이다. 이 방법은 PDA 장치의 작은 인터페이스에서 재생을 효율적으로 할 수 있도륵 객체의 크기를 축소하고, 모든 객체를 아이콘의 기하 객체로 기술하여 초기 로딩 시간을 감소시킨다.

• Proceedings of the Korean Information Science Society Conference
• /
• 2007.06b
• /
• pp.219-222
• /
• 2007

지상파 DMB 데이터 표준인 MPEG-4 BIFS Core2D@Level1을 이용하여 데이터 콘텐츠 구현 시, BIFS 언어가 갖고 있는 문제점으로 인해 GUI 표현이 어렵다. 따라서 본 논문에서는 이와 같은 문제점을 해결하여 데이터 콘텐츠 개발자가 손쉽게 GUI 기능을 구현할 수 있도록 MPEG-4 BIFS GUI 프로파일을 설계하고 구현하였다. DMB 환경에 적합한 GUI 노드 선정을 위해 콘텐츠 개발자의 요구사항 조사와 타 솔루션과의 비교 분석 및 데이터 콘텐츠에서 자주 쓰이는 기능을 파악하였으며, 이와 같은 분석 내용을 바탕으로 GUI 프로파일을 구성을 위한 노드들을 정의하였다. 각 노드들은 XMT 형식으로 구현되었으며, 정의한 프로파일 검증을 위하여 테스트용 데이터 콘텐츠를 개발하였다. 이와 같은 연구를 통해 DMB 데이터 콘텐츠 개발 시 개발자가 화면 구성에 필요한 GUI를 손쉽게 구현할 수 있게 된다면, 다양한 데이터 콘텐츠 개발을 위한 발판이 되어 향후 데이터 방송 활성화에 기여할 수 있을 것이라 기대된다.

• Journal of Broadcast Engineering
• /
• v.11 no.4 s.33
• /
• pp.458-470
• /
• 2006

This paper describes issues and consideration on authoring of interactive multi-view visual content based on MPEG-4. The issues include types of multi-view visual content; scene composition for rendering; functionalities for user-interaction; and multi-view visual content file format. The MPEG-4 standard, which aims to provide an object based audiovisual coding tool, has been developed to address the emerging needs from communications, interactive broadcasting as well as from mixed service models resulting from technological convergence. Due to the feature of object based coding, the use of MPEG-4 can resolve the format diversity problem of multi-view visual contents while providing high interactivity to users. Throughout this paper, we will present which issues need to be determined and how they can be realized by means of MPEG-4 Systems.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.29 no.1B
• /
• pp.117-124
• /
• 2004

With MPEG-4 3D mesh coding(3DMC), the problem of the need of a wide bandwidth can be solved to store and transmit 3D information because of its high compression rate. And to realize the 3D information service with broadcasting or internet, one needs to transmit not only the 3D contents but also the 3D player. Therefore, in this paper we implement a 3D player based on MPEG-4 using a java language. A well-known java language employed in this paper provides the player with a wider range of applications, for example, when the O/S or the platform are different, due to its properties of scalability and universality. The implemented player which has functions (translation, rotation, etc) that can manipulate contents decodes the 3D contents and displays them. In addition, the player has a network function that receives a 3D content from the server. This paper explains the architecture and characteristics of the player and shows its simulation results.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.10 no.6
• /
• pp.1003-1010
• /
• 2006

The usage increase of digital contents required solution for protection technology and interoperability of system. MPEG(Moving Picture Experts Group) proposed MPEG-21 Multimedia Frameworks. MPEG-21 IPMP is standard that provides the means to enable digital item and rights information to be persistently managed and protected across networks and devices. In this paper, MPEG-21 IPMP based system to protect digital contents designed by four structures of license server, production server, consumption server, tool server. License server create rights information document using the XML-based REL about multimedia contents of users. Production server makes a digital item by packaging multimedia resource and metadata, which is combined by REL information and IPMP information of multimedia resource. Consumption server takes care of the functions of players that use digital item, and tool server was implement to transmit for missing tool that might occur in all procedures.

• Journal of Broadcast Engineering
• /
• v.18 no.1
• /
• pp.115-121
• /
• 2013

Recently an extension to DMB AF (Digital Multimedia Broadcasting Application Format) standard has been proposed in such a way that the extended DMB AF can include stereoscopic video and stereoscopic images for interactive service data, i.e., MPEG-4 BIFS (Binary Format for Scene) data, in addition to the existing 2D video and 2D images for BIFS services. In this paper we developed a service that provides the streaming of 3D contents in DMB AF by using MPEG-DASH (Dynamic Adaptive Streaming over HTTP) standard and validated it by implementing the client software.

• Journal of Broadcast Engineering
• /
• v.11 no.3 s.32
• /
• pp.263-275
• /
• 2006

This paper introduces an interactive contents authoring system which can easily and conveniently produce interactive contents for the Terrestrial Digital Multimedia Broadcasting (T-DMB). For interactive broadcasting service, T-DMB adopted MPEG-4 BIFS technology. In order to the interactive service becomes flourishing on the market, various types of interactive contents should be well provided prior to the service. In MPEG-4 BIFS, broadcasting contents are described by the combination of a large number of nodes, routes and descriptors. In order to provide interactive data services through the T-DMB network, it is essential to have an interactive contents authoring system which allows contents authors to compose interactive contents easily and conveniently even if they lack any background on MPEG-4 BIFS technology. The introduced authoring system provides powerful graphical user Interface and produces interactive broadcasting contents in the forms of binary and textual format. Therefore, the BIFS contents authoring system presented in this paper would vastly contribute to the flourishing interactive service.

• The KIPS Transactions:PartB
• /
• v.16B no.2
• /
• pp.101-108
• /
• 2009

As content serviced for IP set-top boxes is streamed over IP network, the existing hacking tools for IP network can be used to capture the streamed content. Until recently, most of the content serviced on IP set-top boxes has been MPEG-2 TS. However, this content will be gradually moved to WMV, MPEG-4 or H.264 because of the relatively low compression efficiency and overhead of the TS packet. In this paper, we propose a DRM scheme other than WMRM for streamed WMV content. Our approach is to design a DRM scheme independent to the existing WMV streaming system. We also design this scheme in order to provide the feature for controlling the DRM processing time considering device performance. We verified it through the experiment.

• Journal of Broadcast Engineering
• /
• v.17 no.6
• /
• pp.1014-1028
• /
• 2012

Recently, N-screen service and secondary device have gotten an attention from public. Also, we can experience N-screen service through various digital devices. N-screen means multimedia technology which can seamlessly consume multimedia content. Secondary device means auxiliary multimedia device which can consume content related to main content through adjunct connection to main device. Not only be electronic manufactures interested in N-screen technology and services but also digital devices applied for N-screen have been released. But it has limitation that user can only consume content to be purchased from content company server not device of user. This paper proposes the system that composes effective and various N-screen multimedia service through MPEG-4 LASeR (Lightweight Application Scene Representation) PMSI (Presentation and Modification of Structured Information) as international standard technology which can provide scene description including many instruction for dynamic update of scene.

• Electronics and Telecommunications Trends
• /
• v.19 no.4 s.88
• /
• pp.63-73
• /
• 2004

최근 디지털 콘텐츠 산업에서의 저작권 보호 시스템에 대한 중요성이 강조되면서 상호 연동 가능한 DRM에 대한 연구가 활발히 진행되고 있다. MPEG-2/4 IPMPX는 이러한 요구조건을 만족시키기 위하여 시작된 대표적인 국제표준으로 현재 그 규격이 완성단계에 있다. 본 고에서는 기존의 폐쇄 프레임워크형 DRM 시스템 구조에서 탈피하여 개방 프레임워크형 기반의 DRM 플랫폼을 제시한 MPEG-2/4 IPMPX의 기술내용과 구현사례에 대하여 살펴보고 앞으로 해결해야 할 문제점을 제시하였다. 또한 관련 기술동향에 대하여도 간단히 언급하였다.