• Proceedings of the IEEK Conference
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• 2003.11c
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• pp.382-385
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• 2003

Introduction of digital broadcasting service does not only mean the change of information transmission method but also the change of total broadcasting system. In past day, Television was only received one-sided information from broadcasting station, but digital broadcasting means that digital television becomes the most important means of information transmission by the introduction of new programming, lots of channels, data service, multi communication. In the age of the digital broadcasting, the recording and replay medium's interest is getting higher. The medium is able to record more than 24 hours' digital broadcasting programs without additional tapes. In this paper the recording and replay device using HDD was implemented and device driver based on linux was programmed. It has Intel PXA250 processor and hard disk is used as storage equipment. And transport Stream is saved on hard disk through PXA250's data bus. FIFO is added to solve the different saving speed and FPGA is also added to display the saved data.

• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.160-164
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• 2003

Broadcasting environment of present our country is greeting period of transition that undergo a change to digital broadcasting system in analog broadcasting system continued for last several decades. With change of these broadcasting environment interest about various digital broadcasting contents industry that fill to digital broadcasting infra and unlawfulness reproduction prevention technology far digital broadcasting contents of high added value is rising. According as is converted to digital broadcasting environment interest about reproduction prevention is well-founded to be risen sensitively. First analog broadcasting environment can not remove perfectly error at transmission in receiver, but can reconstruct contents such as original by error correction function in receiver in the case of digital broadcasting environment. Secondarily, although quality of copy is dwindled than original repeat reproduction in case of analog, many copies are available innumerably regardless of number of times of copy keeping quality such as original in the case of digital And third element is possible easily to anyone to on-line along with development of internet in case of digital contents unlike analog. Under these background, this thesis wish to design and implement digital contents protection system to prevent unlawfulness reproduction and distribution of digital contents using Triple DES algorithm.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2014.06a
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• pp.15-17
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• 2014

인터넷 미디어 기술이 발달하고 개인형 스마트기기(스마트폰, 태블릿PC 등)가 확대 보급됨에 따라 TV 시청행태가 변하고 있다. TV를 시청하면서 개인형 스마트기기를 이용하여 타매체를 동시 이용하는 시청행태가 증가하고 있다. 이러한 시청행태에 대응하여 세컨드스크린 서비스 기술이 주목 받고 있다. KBS는 콘텐츠 사업자 친화적인 세컨드스크린 서비스 기술에 대해 연구하고 TV 친구라는 의미의 세컨드스크린 서비스 플랫폼인 티벗(TVUT) 플랫폼을 개발하였다. 티벗 플랫폼은 이용자 증가에 따른 시스템 확장성과 서비스의 안정성을 고려하여 클라우드 기반 서비스 플랫폼으로 구축하였다. 본 논문에서는 방송 콘텐츠 관련 부가정보를 쉽게 제공할 수 있는 시스템과 서비스 기술을 제시한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2010.07a
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• pp.164-167
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• 2010

`신호 공간 다이버시티(Signal Space Diversity)'기술은 DVB-T2 표준에 포함된 기술로써, 추가적인 전력이나 대역폭의 희생없이 검파에 있어 성능 이득을 얻을 수 있어 DVB-T2 물리계층 핵심적인 기술 중 하나로 평가받으며, 후속 표준인 DVB-NGH 에도 적용 가능성이 높은 기술이다. 본 논문에서는 '신호 공간 다이버시티' 기술을 MIMO 시스템으로 확장하기 위해서 발생하는 문제점에 대해서 분석한 뒤, 이를 해결하기 위해 제안된 '성분 맞교환(Component-Swapping)' 기술을 현재 논의 중에 있는 DVB-NGH 시스템에 적용하여 주어진 실험 환경에서 2.2~3.0dB 가량의 이득을 가짐을 실험적으로 확인하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.05a
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• pp.744-748
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• 2003

Developing an interactive satellite multi­media system, such as a digital video broadcasting (DVB) return channel via satellite (RCS) system, is gaining popularity over the world To accommodate the increasing traffic demand we are motivated to investigate an alternative for improving return channel utilization We develop an efficient method for optimal packet scheduling in an interactive satellite multimedia system using hybrid CDMA/TDMA channels. We formulate the timeslot-code assignment problem as a binary integer programming (BIP) problem, where the throughput maximization is the objective, and decompose this BIP problem into two sub-problems for the purpose of solution efficiency. With this decomposition, we promote the computational efficiency in finding the optimal solution of the original BIP problem Since 2001, ETRI has been involved in a development project where we have successfully completed an initial system integration test on broadband mobile Internet access via Ku-band channels using the proposed resource allocation algorithm.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 1997.06a
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• pp.119-124
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• 1997

We improved a visualization system for a player's sequential forms called‘Multi-Motion’which has ever been used in NHK live broadcasting. It is to extract only the player's forms from background, and overlap them into one frame sequentially after fast performance for a vault game of gymnastics. It helps TV viewers understand the player's performing forms easily. We increased the performance of Multi-Motion by shortening the distance between the current frame and the reference frame, and the synthesis of the reference frame.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2021.06a
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• pp.127-130
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• 2021

지상파 방송에서 재난방송 기술이 진화되고 있다. 하지만 재난방송 정책은 진화된 기술을 제도화하지 못하고 있다. 본 연구는 기술이 재난방송 정책 변화를 줄 수 있는 다섯 가지 요소에서 정책과 기술이 어떤 간극을 보이는지 살펴보았다. 결론적으로 현재 '재난방송 및 민방위경보방송의 실시에 관한 기준'은 신규 기술에 대한 규정을 담기 부족하다. 따라서 재난경보 방송을 구체화하고 재난경보 메시지와 재난방송 수신환경과 수신기에 대한 기술적 규격을 제도화하기 위한 가칭 '재난방송 기술기준'을 시급히 마련하여 할 필요성을 제기하고 있다.

• Proceedings of the IEEK Conference
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• 2000.09a
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• pp.251-254
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• 2000

본 논문은 IBAC(FM In Band Adjacent Channel) 방식의 디지털 오디오 방송(DAB; Digital Audio Broadcasting) 시스템 구현을 기술한 것이다. 구현한DAB 시스템은 현재 방송중인 FM방송의 인접 대역을 사용하기 위한 것으로, DAB 방송을 위해 주파수대역을 추가로 할당할 필요가 없으므로 주파수대역의 효율을 높일 수 있고 가용주파수 대역이 부족한 지역의 주파수할당에 대한 문제점을 해결할 수 있다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2019.05a
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• pp.389-391
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• 2019

In this study, we design a remote broadcasting system that can output announcement to a remote place using wired/wireless telephone. The designed remote broadcasting system uses the LTE module to amplify the telephone voice received wirelessly through the amplifier and output it. Also, a text message for broadcasting can be sent to a remote broadcasting system through a wired/wireless telephone capable of transmitting a text message, and the remote broadcasting system that receives the broadcasting text message can automatically output the corresponding announcement stored in the voice device. For security reasons, the telephone number of the receiver is analyzed by a comparison algorithm so that only the administrator and registered users can use the system. At this time, the recorded announcement broadcast is outputted through the speaker only when it is confirmed as the registered user. The system designed in this study allows the user to output announcements quickly without being limited by time and place.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2007.06a
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• pp.117-120
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• 2007

It has able to be possible that expression and store visual image from analog to digital without picture quality damaged via improvement of video compression technology. And also, It is possible to broadcasting digital image via transmission of digital image on MPEG-2 standardization. for this reason, the broadcasting business owners have converted broadcasting service from analog to digital. But, local SO(System Operator) has a difficult point which secure HD(High Definition) broadcasting program. In this paper, we designed and implemented Scheduling System for MPEG-2 Digital broadcasting which gather HD broadcasting program from major broadcasting business owners(as like MBC, KBS, SBS, etc) and broadcast them.