• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1999.11b
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• pp.81-84
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• 1999

The paper describes MPEG-2 encoder system developed by ETRI. The encoder system consists of video encoder, audio encoder and program multiplexer. The system can be used as an SDTV encoder as well as a sub-picture encoding module of an HDTV encoder. In order to reduce the hardware size and increase the system reliability, most parts of the MPEG-2 encoding algorithm are implemented with ASIC chips except the rate control part. The developed system is compliant with MPEG-2 and ATSC.

• Journal of Broadcast Engineering
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• v.6 no.1
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• pp.66-71
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• 2001

This paper Introduces an implementation of MPEG-2 AAC codec system for digital audio broadcasting. This system consists of the encoder and the decoder. This system includes MPEG-2 system multiplexing and demultiplexing modules for Interfacing to the ETRI-DAB system. Four DSPs are adopted for the encoder and three DSPs for 7he decoder. Each DSP Processes system control. 1/0 control, audio signal processing. multiplexing and demultiplexing. This Paper also discusses some near future estimations relaxed to the DAB system and it\`s services. Currently a stereo audio codec is available but multi-channel audio codec and MPEG-4 audio cosec wall be also Implemented.

• Journal of Broadcast Engineering
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• v.8 no.1
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• pp.80-90
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• 2003

Today, thanks to the spread of Internet and the development of various multimedia technologies, broadcasting environment is changing in a way to merging broadcasting and communication environment. In such a new environment, transparent delivery and interoperability between different technologies become an important issue. In ISO/IEC MPEG meeting, MPEG-21 has been established. In MPEG-21, it is discussed actively about big picture to build an infrastructure for the delivery and consumption of multimedia contents. In this paper, we have applied Digital Item in MPEG-21 to broadcasting contents. Broadcasting Digital Item is generated using MPEG-7 MDS for the description of resources as well as Digital Item Declaration, and Digital Item Identification. Furthermore, we develop Digital Item generation system and parsing system. In experiment, we verify the usefulness of Broadcasting Digital Item by generating an education video contents and consuming it at different user environments.

• Proceedings of the IEEK Conference
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• 1999.06a
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• pp.1099-1102
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• 1999

This paper presents a real-time MPEG-2 AAC decoding system, which can decode 2-channel main profile MPEG-2 AAC bitstream. The proposed system supports all decoding tools except for coupling channel tool, and provides sampling rates of 32, 44.1, 48 KHz. The system consists of a simple programmable DSP core and two hardwired logic modules that perform Huffman decoding and prediction for real-time implementation.

• ETRI Journal
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• v.26 no.2
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• pp.83-91
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• 2004

In this paper, we present an intellectual property management and protection (IPMP) system in a broadcasting environment to provide mechanisms for copyright and contents protection that are compliant with the MPEG-2 and MPEG-4 IPMP Extension (IPMPX) specifications. The technology for processing IPMP related information was exploited, and a terminal model has been successfully designed and implemented. In addition, interoperability, which is the main objective of MPEG-2/4 IPMPX, has been addressed in detail. The experimental results show that the implemented system performs the IPMP process well, meeting the requirements of a broadcasting environment.

• Journal of KIISE:Computer Systems and Theory
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• v.33 no.9
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• pp.574-584
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• 2006

Recently, ISO/IEC 23000 (also known as 'MPEG-A') has proposed a new file format called 'MAF(Multimedia Application File Format)[1]' which provides a capability of integrating/storing the widely-used compression standards for audio and video and the metadata in MPEG-7 form into a single file format. However, it is still very hard to verify the usefulness of MPEG-A in the real applications because there is still no real system that fully implements this standard. In this thesis, a design and implementation of a multimedia retrieval system based on MPEG-A standard on PC and mobile device is presented. Furthermore, an extension of MPEG-A for describing the metadata for video is also proposed. It is selected and defined as a subset of MPEG-7 MDS[4] and TV-anytime[5] for video that is useful and manageable in the mobile environments. In order to design the multimedia retrieval system based on MPEG-A, we define the system requirements in terms of portability, extensibility, compatibility, adaptability, efficiency. Based on these requirements, we design the system which composed of 3 layers: Application Layer, Middleware Layer, Platform Layer. The proposed system consists of two sub-parts, client-part and server-part. The client-part consists of MAF authoring tool, MAP player tool and MAF searching tool which allow users to create, play and search the MAF files, respectively. The server-part is composed of modules to store and manage the MAF files and metadata extracted from MAF files. We show the usefulness of the proposed system by implementing the client system both on MS-Windows platform on desk-top computer and WIPI platform on mobile phone, and validate whether it to satisfy all the system requirements. The proposed system can be used to verify the specification in the MPEG-A, and to proves the usefulness of MPEG-A in the real application.

• Proceedings of the Korea Information Processing Society Conference
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• 2002.04a
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• pp.281-284
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• 2002

디지털 컨텐츠의 인터넷, CD-ROM을 통한 보급의 확대와 함께, 대량 불법복제가 가능하게 되어, 이를 방지하기 위한 저작권 보호기술이 연구되고 표준화되고 있다. 멀티미디어에 관련한 국제 표준을 제정하는 MPEG (Moving Picture Expert Group)은 컨텐츠 저작권 보호를 위한 기술을 MPEG-2, MPEG-4, MPEG-7, MPEG-21의 표준에서 다루고 있으며, MPEG-4에서는 저작권 보호 도구들의 인터페이스의 표준인 MPEG-4 IPMP 를 제정하였다. 저자들은 MPEG-4 IPMP 표준을 기반으로 워터마킹, 암호화 기술을 MPEG-4 시스템[1]에 구현하였으며, 본 논문에서는 MPEG-4가 시스템, IPMP 표준에 대한 소개와 함께, 실제로 구현한 IPMP 시스템을 설명한다.

• The Journal of the Acoustical Society of Korea
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• v.19 no.3
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• pp.57-62
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• 2000

In recent, the innovative improvement of a internet and computing environment make users desire the capability of processing information in real time. In this paper we implement a PC-to-PC real time multi-user communication system on the internet environment using the efficient algorithm for a real time processing and the MFEG-4 CELP codec which can be used for a low bit-rate coding from 6 to 24kbps. The implemented system produces a compressed bit-streams with the MPEG-4 CEU Mode-I 18200bps mode. There is 5 frames for a package and 1 frame has 160 samples. We can use this system to communicate with 4 users simultaneously in real time. The system is designed and examined on the Windows operating system.

• Proceedings of the Korean Information Science Society Conference
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• 2002.04b
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• pp.595-597
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• 2002

MPEG그룹은 미디어 객체를 시간과 3차원 공간상에 배치하여, 멀티미디어 컨텐츠를 표현하고, 사용자의 상호작용을 가능하게 하는 MFEG-4 System물 표준화하였으며, 다양한 전송계층 (File, TCF/IP, Broadcasting등)을 통합하여 처리할 수 있는 MPEG-4 System의 Multimedia Interface Framework)[3] 전송규약을 표준화하였다. 이 논문에서는 MPEG-4 System을 이용하여 비디오, 오디오, 그랙픽과 같은 다양한 미디어들을 결합하해주고 사용자와의 상호작용에 의한 실시간 표현을 가능하게 해주며 사용자가 MPEG-4 Sytem에 대해서 잘 알고 있지 않더라도 손쉽게 MPEG-4미디어 파일을 만들 수 있도록 해주는 저작툴을 제안한다 [1,3,5]

• Journal of the Korea Institute of Information and Communication Engineering
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• v.15 no.4
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• pp.839-844
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• 2011

IPTV contents are based on MPEG2-TS(Moving Picture Expert Group-2 Transport Stream). The Created content is delivered to each home's Set-Top box through the Internet service network, which will be visible on television through the decoding process. The using and spending of content expanding were quite limited in the other existing lines' devices. For this end, provided methods are to convert MPEG2-TS to other format and then transmit it. These methods are causing not only an overload to the system but also its increasing the hardware resource requirements. In this paper, the MPEG2-TS of IPTV's content using RTP(Real time Transport Protocol) provided by the applicable variety of devices and environmental system, was designed and implemented. Through this paper, the existing MPEG2-TS is providing other devices for distribution and consumption that can give better content to the consumers which means that the QoS(Quality of Service) was enhanced. And, the increased consumption and use of content will help the IPTV business to get more development and activation.