• Journal of Convergence for Information Technology
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• v.10 no.1
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• pp.28-34
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• 2020

This paper intends to examine the recent acquisition of 21st Century Fox by Walt Disney Co. in terms of how information communication technology, especially the internet, has been reshaping the media industry. In particular, it looks at the deal as Disney's attempt to adapt to the rapidly shifting media environment and strike back at the challenges from online streaming services. After looking at the overview of the deal and some of the major changes and challenges the rise of streaming services has brought to film and media landscape, the paper looks at Disney responded to them by launching its own streaming services and how its acquisition of Fox assets factors in this. It also examines the implications of Disney's move as well as the opportunity and challenges it faces.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.41 no.11
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• pp.1580-1588
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• 2016

Recently, as the proliferation of mobile smart devices, multimedia content sharing technologies between mobile smart devices have provided. For efficient content sharing in wireless networks, the hierarchical streaming network has been proposed. However, member devices in a network group experience frequent delay while playing multimedia content files because of excessive network resource occupation between a relay and member devices. In this paper, we propose an efficient multimedia streaming relay method using media buffer control to reduce network congestion during streaming from the relay device to the member devices. We also measured the number of buffering and buffering time of the proposed relay engine and compared them with the performance of the existing relay engine.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.40 no.3
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• pp.506-515
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• 2015

In this paper, we propose a group playback synchronization method using adaptive synchronization delay time by the bit rate of media to synchronize a play position of streaming media between mobile smart devices. This method consists of streaming server-side and client-side synchronization algorithms based on synchronization delay time which includes connection time, control packet transmission time, streaming data buffering time, and synchronization processing time. We implement the Android media player application with synchronization support using the proposed algorithms and present the result of performance evaluation.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.29 no.8A
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• pp.859-867
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• 2004

To provide high-quality media streaming service over the best-effort Internet, a streaming methodology is required to response to the dynamic fluctuation of underlying networks. In this paper, we implement the MPEG-4 streaming system with adaptive transport based on priorities of media packets. The implemented system is composed of the common MPEG-4 streaming components such as elementary stream provider, sync and DMIF layer, and adaptive transport module including data prioritization and FEC control. More specifically, the prioritized sync layer packets (based on object level) are delivered to the transport module and then are encoded by an adaptive FEC encoder to help reliable transport. The FEC combination is dynamically adjusted by the feedback information from the receiver. In addition, low priority packets are selectively dropped to meet the limitation of available bandwidth. The experimental results over the emulation-based testbed show that the Proposed system can mitigate the impact of network fluctuation and thus improve the quality of streaming.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2001.11a
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• pp.335-354
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• 2001

.Next Generation Multimedia Streaming Technology Massive Scale Support $\rightarrow$ Clustered Solution Adaptive to Heterogeneous Network daptive to Heterogeneous Terminal Capability Presentation Technique .SMART Server Architecture .HERMES File System .Clustered Solution . High Speed Storage Interconnect .' Content Partitioning . Load Management . Support for Heterogeniety . Adaptive End to End Streaming Transport: Unicast vs. Multicast '. Scalable Encoding

• Journal of Broadcast Engineering
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• v.27 no.6
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• pp.848-859
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• 2022

This paper presents a novel 360-degree video streaming system for large-scale immersive displays and its ongoing implementation. Recent VR systems aim to provide a service for a single viewer on HMD. However, the proposed 360-degree video streaming system enables multiple viewers to explore immersive contents on a large-scale immersive display. The proposed 360-degree video streaming system is being developed in 3 research phases, with the final goal of providing 6DoF. Currently, the phase 1: implementation of the 3DoF 360-degree video streaming system prototype is finished. The implemented prototype employs subpicture-based viewport-dependent streaming technique, and it achieved bit-rate saving of about 80% and decoding speed up of 543% compared to the conventional viewport-independent streaming technique. Additionally, this paper demonstrated the implemented prototype on UCSB AlloSphere, the large-scale instrument for immersive media art exhibition.

• Proceedings of the KIEE Conference
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• 2006.10c
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• pp.515-517
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• 2006

Recently, there is a rapidly growing demand for efficient real-tine playback and transmission of large amounts of multimedia data. But most users' connections are not fast enough to download large chunks of multimedia data. Therefore a streaming technology is needed in which users enable the real-time playback of multimedia date without having to download the whole of the multimedia date. In this paper, we propose a personalized IP streaming system. The proposed IP streaming system enables users to got an intelligent recommendation of multimedia contents based on the user preference information stored on the streaming server or the home media server. Moreover, users are assured of seamless access of streamed content event if they switch to another client device by implementing streaming system based on user identification and device information. We evaluate our approach with simulation results.

• Journal of Korea Multimedia Society
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• v.14 no.7
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• pp.905-916
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• 2011

Recently, the W3C has developed the HTML 5 standard to provide various multimedia services as well as a web based streaming. HTML5 based web browsers with the built-in video codecs can be used directly for streaming services, though previous web browsers should contain playback plug-in for streaming services. In addition, an adaptive streaming technology using HTTP/TCP has been standardized, since an Internet firewall does not support RTP/UDP streaming protocol but HTTP/TCP streaming protocol. In this paper, we propose the service migration mechanism among various devices in the HTML5-based adaptive HTTP streaming environments. The proposed algorithm and architecture were modeled for migrating media flows, media flow control, and session control and implemented using JavaScript. Finally, we showed that the proposed mechanism was effective to migrate HTTP streaming service among various devices by performing several experiments.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.280-282
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• 2005

In this paper we propose several mapping schemes for streaming video generated by state-of-the-art H.264 codec over IEEE 802.11e enabled wireless LANs. The schemes take advantage of both 802.11e's QoS mechanism and some novel features of the H.264 codec, so as to protect the most important information in terms of visual quality and reduce distortion under network congestion. The proposed methods are evaluated by means of the H.264 reference software codec, network simulation, and objective video quality measurements. Results show that the proposed methods achieve a robust and error resilient H.264 video streaming over wireless LANs than traditional best-effort streaming.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2012.11a
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• pp.203-206
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• 2012

본 논문은 HTTP protocol을 이용한 미디어 Streaming 서비스 표준인 MPEG-DASH(Dynamic Adaptive Streaming over HTTP)를 기반으로 한 N-Screen 서비스 동기화 방안을 제시한다. N-Screen 서비스란 다수의 미디어 Device를 이용하여 하나의 콘텐츠들을 공유 및 전송하는 서비스를 뜻한다. 이는 MPEG-DASH 표준 기술을 활용함으로써 보다 효율적인 서비스 이용이 가능하다. DASH는 다수의 품질의 같은 영상들을 시간별로 분할하여 Server에서 보유하여 한 Device에게 네트워크 환경에 맞춰 가장 적합한 Segment들을 전달 및 전환함으로써 끊기지않는 Streaming 서비스가 가능하다. 하지만 현재 MPEG-DASH 표준기술에서는 N-Screen 서비스에 대한 활용방안 시나리오가 재정되어 있지 않아 다수의 Device에서 Segment를 끊김없는 Media Streaming 서비스를 지원하기 위한 방안이 필요하다. 이를 위해 본 논문에서는 한 Device가 다른 Device에게 N-screen을 위한 동기화 정보를 전송함으로써 특정 콘텐츠가 끊기지 않고 연이어 볼 수 있는 동기화를 이룰 수 있는 방안을 대한 서비스 시나리오를 제시한다.