• Proceedings of the Korea Information Processing Society Conference
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• 2009.11a
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• pp.925-926
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• 2009

All IP 기반 BcN(Broadband Convergence Network)의 발전과 단말 기술의 발전은 언제 어디에서나 임의의 단말을 통해 웹과 같은 데이터 서비스, 통화 서비스, 스트리밍 서비스를 동시에 이용하는 것을 가능하게 하였다. 주로 TV를 통한 멀티미디어 콘텐츠 서비스가 PC와 모바일 단말 상에서도 가능해 졌으며, PC를 중심으로 사용되던 웹 기반 서비스가 TV와 모바일 단말에서도 사용이 가능해지고 있다. 본 논문에서는 서비스 이용환경을 향상시키기 위해 특정 단말에서 이용 중인 서비스를 다른 단말에서 끊김 없이 이용할 수 있도록 하는 서비스 세션 이동성을 보장하는 메커니즘에 대해서 살펴보고, 웹 기반 서비스의 세션 이동성 보장에 관한 기존 연구를 비교 분석하고, 향후 연구 방향을 정립하고자 한다.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2020.11a
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• pp.297-300
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• 2020

COVID-19로 인해 많은 사람들이 다양한 오프라인 활동을 즐기지 못하고 있다. 따라서 포터블 중계 시스템을 이용하여 온택트 시대에 맞는 소통 콘텐츠 제작이 요구되고 있다. 본 논문에서는 방송 송출 프로그램을 이해하고 그를 이용한 CG사용과 크기가 작은 포터블 중계 시스템의 장점을 살려 장소에 제약이 없는 실시간 유튜브 스트리밍 구현을 설계하였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2021.05a
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• pp.97-99
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• 2021

Edge caching can provide high QoE by reducing traffic in the backhaul network and reducing latency in video streaming services. But due to the limited capacity of edge cache, large amounts of content cannot be cached. In this paper, we propose an edge-fog prefix caching that reduces playback delay by caching prefixes of video content on edges and storing the rest in fog cache.

• Journal of Korea Entertainment Industry Association
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• v.13 no.6
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• pp.15-24
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• 2019

Hollywood traditional movie companies are continuously challenged by new-type companies represented by the streaming content platforms. Based on the latest market statistics, and with a multidimensional approach involving the production, distribution, projection and overseas market, etc, this paper analyzes the changes and development of North American movie industry in its process of coping with the globalization and digitalization of media in 2018, and summarizes the effective measures for Hollywood mainstream movie companies to adjust their own structures and operation mechanism to maintain their development in the environment of new media consumption.

• Proceedings of the Korea Information Processing Society Conference
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• 2023.05a
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• pp.738-739
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• 2023

음원별 음량 차이가 심하여 청각적 불편함을 초래하는 상황을 음량정규화 기술을 통해 완화하려고 한다. 그러나 현재 상용화된 관련 기술을 보면 대부분 음량을 조정하는 경우에 음원의 품질을 보장할 수 없거나, 반대로 음원의 품질을 보장하는 경우에 음량 조정이 지극히 미세한 수준이다. 또한 음원 제공 플랫폼이나 음원의 형태에 따라 적용 가능한 대상이 제한되는 문제도 존재한다. 이러한 품질 문제를 해결하기 위해 본 논문에서는 쾌적최대음량(CML)과 절대음량 체계를 도입하고 음원 손실을 최소화한 음량평준화 시스템을 제안한다. 그리고 일반적인 음원 파일뿐만 아니라 실시간 스트리밍 콘텐츠의 음원을 음량정규화할 수 있도록 설계하여 기존 상용 기술의 대상 제한 문제를 완화하고자 한다. 본 논문은 청자 혹은 서비스 이용자의 만족스러운 음원 감상에 기여한다는 점에서 의의를 가진다.

• Journal of the Korea Society of Computer and Information
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• v.24 no.11
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• pp.11-19
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• 2019

Recently, hybrid CDN/P2P video streaming architecture is specially designed and deployed to achieve the scalability of P2P networks and the desired low delay and high throughput of CDNs. In this paper, we propose a cooperative video streaming and active node buffer management technique in hybrid CDN/P2P architecture. The key idea of this streaming strategy is to minimize network latency such as jitter and packet loss and to maximize the QoS(quality of service) by effectively and efficiently utilizing the information sharing of file location in CDN's proxy server which is an end node located close to a user and P2P network. Through simulation, we show that the proposed cooperative video streaming and active node buffer management technique based on CDN and P2P network improves the performance of realtime video streaming compared to previous methods.

• Journal of the Korea Society of Computer and Information
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• v.17 no.2
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• pp.177-185
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• 2012

In this paper, we developed the composition system that it can efficiently edit camera recording data, images, office document such as powerpoint data, MS word data etc in real-time and broadcasting system that the file is made by the composition system. In this Study, we developed two kinds of algorithm; Approximate Composition for Optimization (ACFO) and Sequence Composition using Memory Que (SCUMQ). Especially, the system is inexpensive and useful because the system is based on mobile devices and PCs when lectures hope to make video institutional contents. Therefore, it can be contributed for e-learning and m-learning. In addition, the system can be applied to various fields, different kinds of multimedia creation, remote conferencing, and e-commerce.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.19 no.2
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• pp.1-7
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• 2019

Recently, multimedia streaming service has been activated, and the demand for high-quality multimedia convergence contents services is predicted to increase significantly in the future. The issues of the increasing network load due to the rise of multimedia streaming traffic must be addressed in order to provide QoS guaranteed services. To do this, an efficient network resource management and mobility support technologies are needed through seamless mobility support for heterogeneous networks. Therefore, in this paper, an MIH technology was used to recognize the network situation information in advance and reduce packet loss due to handover delays, and an ACLMIH-FHPMIPv6 is designed that can provide an intelligent interface through introducing a hierarchical mobility management technique in FPMIPv6 integrated network.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.24 no.7
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• pp.879-884
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• 2020

In the conventional video file system, videos are stored in a high performance server which has mass storage hard disks or disk arrays. For 3D internet broadcasting, real time operations are required to transmit video files to many clients. This paper describes the design of the 3D internet broadcasting system which can provide realtime streaming service to many users in the 5G environment. In reality, unicast is used to transmit multimedia contents over the internet rather than IP multicast since IP multicast has its own drawbacks in deployment, security, maintenance and so on. In addition, multimedia broadcasting service system like VoD has difficulties in applying to 3D internet broadcasting system since it requires a large amount of system and network resources. In this work, we develop a 3D internet broadcasting system which can construct effective data delivery by minimizing performance-degrading factors.

• Journal of the Korea Society of Computer and Information
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• v.26 no.3
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• pp.1-7
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• 2021

In this paper, optimized media data retrieval and transmission based on the Hybrid CDN/P2P architecture and selective storage through user's prediction of requestability enable seamless data transfer to users and reduction of unnecessary traffic. We also propose a new media management method to minimize the possibility of transmission delay and packet loss so that media can be utilized in real time. To this end, we construct each media into logical segments, continuously compute weights for each segment, and determine whether to store segment data based on the calculated weights. We also designate scattered computing nodes on the network as local groups by distance and ensure that storage space is efficiently shared and utilized within those groups. Experiments conducted to verify the efficiency of the proposed technique have shown that the proposed method yields a relatively good performance evaluation compared to the existing methods, which can enable both initial latency reduction and seamless transmission.