• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2003.11a
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• pp.205-208
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• 2003

디지털 방송의 발달로 인해 현재 방송 환경은 사용자가 단순히 제공되는 콘텐츠를 감상하는 수준에서 사용자가 콘텐츠와 직접 대화하는 대화형 방송이 발달하고 있다 MPEG-4 콘텐츠는 이러한 대화형 방송에 매우 부합되는 콘텐츠이며, 그 사용이 점차 증가하고 있다. 향후 MPEG-4 콘텐츠가 널리 이용될 때, MPEG-4 콘텐츠에 MPEG-7 ES를 하나의 미디어 데이터로 간주하고 MPEG-4 콘텐츠에 포함하여 전송한다면, MPEG-4 콘텐츠의 검색 및 관리가 용이해질 뿐만 아니라 MPEG-7의 다양한 기능과 결합한다면 MPEG-4 콘텐츠의 응용을 더욱 풍부히 할 수 있다. 본 논문에서는 이를 위해 MPEG-4 콘텐츠에 OCI 기술자 또는 MPEG-7 ES를 포함한 MPEG-4 콘텐츠를 재생할 수 있는 MPEG-7 over MPEG-4 시스템디코더와 그 구조에 대해 서술하였다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2003.11a
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• pp.223-226
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• 2003

최근, 컴퓨터 환경의 발달로 각 분야에서 AV(Audio-Visual) 콘텐츠의 사용량이 기하급수적으로 증가되었다 또한 컴퓨터, 방송 및 네트워크의 융합으로 이 전 보다 다양한 종류의 어플리케이션에서 다양한 형태로 AV 콘텐츠가 사용되고 있다 이에 따라, 이런 다양한 형태의 AV콘텐츠를 표현하는 방법 및 검색하여 사용하는 방법에 대한 많은 연구들이 이루어지고 있다 이런 연구들의 한 형태로 본 논문에서는 AV 콘텐츠를 표현하는 방법으로 MPEG-4 콘텐츠를 XML에 기반 하여 표현한 XMT(eXtensible MPEG-4 Textual fomat)와 AV 콘텐츠를 검색하는 방법으로 MPEG-7 표준을 사용하여 객체기반 MPEG-4의 콘텐츠 검객 시스템을 제안하였다 다양한 포맷의 미디어 데이터 및 그래픽 객체들을 각각의 하나의 객체로 간주하여 AV콘텐츠를 구성하는 MPEG-4 시스템을 XML을 기반으로 표현한 XMT 포맷으로는 MPEG-4 콘텐츠를 구성하는 미디어 데이터를 바탕으로 검색하는데 한계가 있다. 따라서 미디어 데이터 검색을 위한 메타데이 터의 표준으로 사용되고 있는 MPEG-7 을 사용하여 객체 기반 MPEG-4 콘텐츠 검색이 효과적으로 이루어질 수 있도록 확장된 XMT 포맷을 제안하고, 이를 사용하는 시험 시스템을 구성하였다. 이렇게 함으로써 MPEG-4로 표현된 객체 기반 AV 콘텐츠 검색 시 MPEG-7메타데이터를 사용하여 보다 사용자가 원하는 콘텐츠를 효율적으로 검색하여 제공할 수 있을 것으로 사려된다

• Journal of KIISE:Computing Practices and Letters
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• v.11 no.2
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• pp.124-132
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• 2005

We propose a method using a transformation of an object and a scene tree in order to author MPEG-4 contents for mobile devices in this paper. The method transforms media objects in the scene into geometry objects in order to reduce initial loading time of the contents, and reduces an external form of each object in a scene of the content for presenting it efficiently on the small interface of mobile devices. Therefore, the contents for mobile devices are reconstructed by the method. An original object in the scene is presented on a mobile device when a user clicks a related geometry object. The method was applied to a conventional authoring tool, so we could find that the method showed an efficient presentation of MPEG-4 contents on mobile devices.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.225-228
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• 2004

Digital contents is used already in near place with us. Contents of MPEG-4 standard is used to process multimedia data in field of communication, computer, broadcasting mobile etc. However, absence of copyright management and protection system and interoperability problem of right system between each corporation happened. Because MPEG establish IPMP(Intellectual Property Management and Protection) system standard in agreement with MPEG-4 system standard, proposed cooperation method to manage and protect copyright. Accordingly, in this paper, put in copyright of authorized contents management and protection extension system implementation adding MPEG-4 IPMP system like plug-in into existing MPEG-4 authorizing tool. Therefore, author edits IPMP information to protect contents or object, and process the information in system and authorize MPEG-4 digital contents that have management and protection sign according to IPMP standard. This system designed and implemented to divided into IPMP information save processor, IPMP information creation processor, media IPPM processor, XMT-A to MP4 converter IPMP extension.

• Journal of KIISE:Software and Applications
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• v.33 no.2
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• pp.220-230
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• 2006

As the computing technique and mobile devices get developed, the demand of multimedia contents for mobile environment has been increased. The multimedia contents provided on PDA has so far been limited to the materials such as video and audio. MPEG-4 is the international standard used for supporting to properly save, communicate multimedia in formation such as video, audio, image, text and two-dimensional object, which can present various, multimedia contents by using adaptation techniques. However, since most MPEG-4 contents are not used for PDA but desktop, it seems not to be played on PDA where needs low power consumption, limited memory capability and GUI, and so on. In this paper, we propose the adaptation techniques, which can present the MPEG-4 contents on PDA, using scene composition with MPEG-4. The proposed scheme consists of three subparts: physical adaptation, variation adaptation and resource adaptation. Physical adaptation adjusts the physical difference of between the authoring environment and playback environment. Event adaptation part transforms events used for desktop to the events used for playback on PDA. The resource adaptation enables efficiency of playback to promote by using the essential information table on BIFS parser. As the proposed scheme is applied to MPEG-4 player, we see that the MPEG-4 contents are efficiently played on PDA.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.1
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• pp.409-412
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• 2005

A digital content have been utilized extensively without being limited to one territory of communication, computer, broadcasting, Mobile etc. A digital contents industry have been raised to a key point industry of a knowledge information society. An information infra setup of a global unit was processing to the development of Internet therefor copyright protection a digital contents and system for the officer have been desired. Like this, according as digital contents do fetters to MPEG-4 is circulated, copyright problem was risen. So, people had a lot of interests to protect and manage copyright. Hereupon, MPEG of the IS0/IEC established IPMP(Intellectual Property Management and Protection) standard, and supplements and corrects continuously standard. Therefore, existing system does fetters to MPEG-4 need system that process IPMP information. Hereupon. in this paper, designed system module that is processed by IPMP extension standard that progress now, and embodied copyright protection and management system that user can insert and update IPMP information efficiently within whole or specification part of MPEG-4 digital contents.

• Journal of Korea Multimedia Society
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• v.12 no.5
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• pp.677-687
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• 2009

Despite the fact that the mobile environment has favorable conditions for using data contents, it is not easy to implement enhanced data services for mobile broadcasting based on MPEG-4 BIFS. With a structure inherited from VRML, BIFS targets different types of content with a development approach that is not very compatible with broadcasting contents. Furthermore, it is not easy to implement BIFS because the standard is too complicated for the mobile broadcasting environment. Accordingly, this study proposes an enhanced mobile TV contents model that provides interactive 3D objects and GUI for the viewers to interact with the broadcasting contents. By applying the model to the DMB environment, this study suggests a direction for future developments of mobile broadcasting contents. In order to represent 3D graphics on mobile TV, we analyzed MPEG-BIFS 3D nodes and composed a subset of VRML profile, and defined new nodes that can efficiently represent GUI at the content development level. If this study helps facilitate expression of 3D graphics and interactions in data contents composition, enhanced efficiency of contents development is expected to promote the development of various contents suitable for the mobile broadcasting environment.

• Proceedings of the Korea Multimedia Society Conference
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• 2003.11b
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• pp.499-502
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• 2003

대화형 멀티미디어 서비스를 위한 차세대 멀티미디어 콘텐츠의 국제 표준 규격인 MPEC-4에서는 저작된 콘텐츠를 저장하기 위한 포맷으로 XMT (extensible MPEG-4 Textual format)와 MPEG-4 파일 포맷 (MP4)를 제공하고 있다. XMT와 MP4는 각각 텍스트 형식과 이진 형식이며 각기 장단점을 가지고 있으므로, 콘텐츠의 효율적인 저작, 관리 및 스트리밍을 위해서는 두 포맷간의 상호 변환을 수행할 구 있는 컨버터가 필요하다. 또한 나날이 콘텐츠의 종류와 수가 증가됨에 따라 MPEG-4 콘텐츠의 용이한 검색도 필요하다. 따라서 본 논문에서는 MPEG-4에 기반을 둔 대화형 콘텐츠를 저작하고 검색하기 위한 XMT-A to/from MP4 컨버터를 설계하고 구현하였다.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.6
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• pp.737-741
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• 2010

When implementing Enhanced TV services, the time synchronization between the video stream that forms the background and the data contents overlaid on audio/video is an important issue. Currently, however, the basic method of synchronizing the data in the MPEG-4 environment is based on absolute time values. For more efficient synchronization when developing Enhanced TV content, this paper proposes a content-based synchronization in which the data content varies depending on the video content. The proposed content-based synchronization method is implemented by defining BIFS nodes more widely, based on scene keywords, and then using the metadata of MPEG7.

• Journal of Korea Multimedia Society
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• v.10 no.7
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• pp.869-881
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• 2007

In this paper, storing and removing method of broadcasting content is proposed for personalized consumption. The main objective of this paper is to keep personalized information, such as additional contents, user creation data, usage history, with broadcasting content, and user can consume broadcasting content to accommodate individual preference. Consequently, proposed file format in this paper is based on MPEG-4 and MPEG-21 file format because they can access and extract data within file format easily and can keep spatiotemporal relation between data. In addition, TV-Anytime metadata is used for program description metadata. Finally, proposed method is verified with file format player and useful application scenarios.