• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2005년도 추계종합학술대회
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• pp.1193-1196
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• 2005

In this paper, we presents a new multimedia service transmit method using IPv6. The IPv6 provides the address system of 128 bit and the address space which is infinite it provides. But it will not become the IPv4 and interchange not to be, it uses the DSTM Transition mechanism which will reach and the IPv4 center in the packet header the service type it will be able to support the service class of multi type (TOS) it secures the weak point of data transfer delay it puts a base in the IPv6. The efficiency of this proposed technique have been proven by MPEG-4 streaming video streaming of the IPv6 namely, 6Xtream embodied a order form/live streaming server and the client which it uses to be possible in base and real-time decoding method.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송공학회 2009년도 IWAIT
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• pp.668-672
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• 2009

In wireless ad-hoc network, knowing the available bandwidth of the time varying channel is imperative for live video streaming applications. This is because the available bandwidth is varying all the time and strictly limited against the large data size of video streaming. Additionally, adapting the encoding rate to the suitable bit-rate for the network, where an overlarge encoding rate induces congestion loss and playback delay, decreases the loss and delay. While some effective rate controlling methods have been proposed and simulated well like VTP (Video Transport Protocol) [1], implementing to cooperate with the encoder and tuning the parameters are still challenging works. In this paper, we show our result of the implementation experiment of VTP based encoding rate controlling method and then introduce some techniques of our parameter tuning for a video streaming application over wireless environment.

• 한국방송∙미디어공학회:학술대회논문집
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• 한국방송∙미디어공학회 2019년도 하계학술대회
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• pp.144-146
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• 2019

Recently, according to the rapid development of surveillance information, closed-circuit television (CCTV) has become an indispensable component in security systems. A lot of advanced technologies of encryption and compression are implementing to improve the performance and security levels of the CCTV system. Especially, 360 video CCTV streaming is promising for surveillance without blind areas. However, compared to previous systems, 360 CCTV requires large bandwidth and low latency. Therefore, it requires more efficiently effort to improve the CCTV system performance. In order to meet the demands of 360 CCTV streaming, transcoding is an essential process to enhance the current CCTV system. Moreover, encryption algorithm is also an important priority in security system. In this paper, we propose a real-time transcoding solution in combination with the ARIA and AES algorithms. Experimental results prove that the proposed method has achieved around 195% speed up transcoding compared to FFMPEG libx265 method. Furthermore, the proposed system can handle multiple transcoding sessions simultaneously at high performance for both live 360 CCTV system and existing CCTV system.

• 한국게임학회 논문지
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• 제12권4호
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• pp.13-22
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• 2012

초고속 인터넷의 광범위한 보급으로 가능해진 클라우드 컴퓨팅 기반 게임 서비스는 클라우드 노드에서 게임을 실행하고 게임의 영상을 원격 사용자의 단말기에 영상 스트림으로 전송함으로써 게임 서비스가 이루어진다. 사용자 입력은 게임에 즉각적으로 전송되고 반영된다. 이러한 서비스가 가능한 이유는 사용자 입력이 반영되고 게임 영상이 사용자에게 전달되는데 걸리는 시간이 최소화되어. 컴퓨터 게임에서 요구되는 반응성을 일반적으로 만족시킬 수 있었기 때문이다. 하지만 이러한 서비스는 고품질 3D 게임을 서비스하는 경우, 서버 구축에 많은 비용이 소요될 수 있다. 클라우드 노드가 탑재하고 있는 일반적인 그래픽 시스템은 동시에 하나의 3D 어플리케이션을 지원하도록 설계되어 있기 때문이다. 하나의 클라우드 노드에서 다수의 3D 게임을 실행하기 위해서는 그 실행에 필요한 실시간 다중 렌더링 기술이 필수적이다. 본 논문은 다수의 컴퓨터 게임을 하나의 클라우드 노드에서 실행시키고 다른 노드에서 각 게임 영상을 획득할 수 있는 이중 서버 구조를 제안한다. 몇가지 실험을 실시하여 기술적 가능성을 알아본다.

• 한국통신학회논문지
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• 제32권12B호
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• pp.758-766
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• 2007

클라이언트-서버 구조의 스트리밍 시스템은 서버의 가용 능력에 따라 클라이언트의 개수가 제한되는 단점을 가지고 있다. 본 논문에서는 인터넷 방송 시스템의 확장성과 안정성을 지원하기 위해 P2P에 기반한 모델을 제시한 후, 프로토타입 시스템을 구현한 사례를 소개한다. 본 논문에서 구현한 시스템인 OmniCast264는 실시간으로 H.264 비디오 스트림을 제공하는 인코딩 서버, 스트림을 네트워크에 분배하는 스트리ald 서버, 비디오의 재생 및 분배를 담당하는 피어 노드, 그리고 P2P 네트워크에 노드를 동적으로 배치시키는 프록시 서버로 구성된다. P2P에기반한 OmniCast264은 스트리밍 부하의 분산화, 실시간 재생, 에러 발생에 따른 강건함, 계층의 모듈화 등의 개념을 가지고 있기 때문에 대용량의 인터넷 방송에 적합하다고 할 수 있다. 마지막으로 12 대의 PC들을 병렬 및 직렬 구조의 P2P로 구성한 후, OmniCast264의 성능을 평가하여 실시간 재생이 가능함을 검증하였다.

• 인터넷정보학회논문지
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• 제23권5호
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• pp.59-68
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• 2022

코로나 시대 실시간 라이브 스트리밍 방송과 비대면 수업이 확산되고 있음에 따라 온라인 스트리밍 수업에 대한 학문적 관심이 필요한 시점이다. 특히 이용자 측면에서 왜 온라인 스트리밍 수업을 이용하는지를 밝히는 것이 중요하다. 이에 본 연구는 온라인 스트리밍 수업의 특성으로 사회적 현존감, 흥미성, 이용 편리성, 상호작용성을 제안하고, 이들 특성이 학습 만족도에 어떠한 영향을 미치는지, 나아가 추천의도에 어떠한 영향을 미치는지를 검증하고자 하였다. 중국 대학생 338명을 대상으로 설문 조사를 실시한 결과 상호작용성, 사회적 현존감, 흥미성은 학습 만족도에 정적인 영향을 미치는 것으로 나타났지만, 이용 편리성의 영향력은 나타나지 않았다. 한편, 학습 만족도는 온라인 스트리밍 수업 추천의도에 긍정적인 영향을 미치는 것으로 확인되었다.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제13권10호
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• pp.5130-5143
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• 2019

Football (soccer) is one of the most popular sports in the world. A huge number of people watch live football matches by TV or Internet. A football match takes 90 minutes, but viewers may only want to watch a few highlights to save their time. As far as we know, there is no such a product that can be put into use to achieve intelligent highlight extraction from live football matches. In this paper, we propose an intelligent editing system for live football matches. Our system can automatically extract a series of highlights, such as goal, shoot, corner kick, red yellow card and the appearance of star players, from the live stream of a football match. Our system has been integrated into live streaming platforms during the 2018 FIFA World Cup and performed fairly well.

• 디지털산업정보학회논문지
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• 제15권3호
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• pp.45-53
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• 2019

Moving image sharing technology has developed various servers and programs for personal broadcasting. In this paper, we propose the method of transmitting the multiple moving image, including the output channel of external streaming server. It also implements and tests multiple real-time broadcast channel automatic transmission systems that assign multiple output channels to automatic output channels. As a result of the experiment, it is easy to allocate moving image to broadcast channels that are output through the external streaming server's output channels regardless of the size of the streaming server, enabling the management of efficient output channels at the time of transmission of multiple moving image. The moving image can be provided through streaming method regardless of the type of moving image from the moving image provider terminal, and the moving image transmission can be controlled in various ways, including adding and changing channels for which the moving image is sent, and sending delayed to the moving image.

• Asia pacific journal of information systems
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• 제32권3호
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• pp.684-705
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• 2022

A new trend has been emerging in recent years, with video game live streaming becoming a meeting ground for gamers, as well as a marketing strategy for game developers. In line with this trend, the emergence of the "Let's Play" culture has significantly changed the manner in which people enjoyed video games. In order to academically explore this new experience, this study seeks to answer the following research questions: (1) Does engaging in video game streaming offer the same feeling as playing the game? (2) If so, what are the factors that affect the feeling of telepresence from viewers' perspective? and (3) How does the feeling of telepresence affect viewers' learning experience of the streamed game? We generated and empirically tested a comprehensive research model based on the telepresence and consumer learning theories. The research findings revealed that the authenticity and pleasantness of the streamer and the interaction of viewers positively affect telepresence, which in turn is positively associated with the gained knowledge and a positive attitude toward the streamed game. Based on the research findings, various practical implications are discussed for game developers as well as platform providers.

• ETRI Journal
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• 제29권5호
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• pp.569-595
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• 2007

Particularly in wireless communications, link errors severely affect the quality of the services due to the high error probability and the specific error characteristics (burst errors) in the radio access part of the network. In this work, we show that thorough analysis and appropriate modeling of radio-link error behavior are essential to evaluate and optimize higher layer protocols and services. They are also the basis for finding network-aware cross-layer processing algorithms which are capable of exploiting the specific properties of the link error statistics, such as predictability. This document presents the analysis of the radio link errors based on measurements in live Universal Mobile Telecommunication System (UMTS) radio access networks as well as new link error models originating from that analysis. It is shown that the knowledge of the specific link error characteristics leads to significant improvements in the quality of streamed video by applying the proposed novel network- and content-aware cross-layer scheduling algorithms. Although based on live UMTS network experience, many of the conclusions in this work are of general validity and are not limited to UMTS only.