• Proceedings of the Korea Contents Association Conference
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• 2003.05a
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• pp.218-222
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• 2003

Internet has made it easer to get information, also distribute and exchange it among people. It brings about issues regarding intelligent property and copyright threats. h a multimedia commerce such as video-on-demand, Internet broadcasting services, only users who have rights for use of these services should be able to access and watch those video or movies In this paper, we propose DRM(Digital Right Management) system for P4 -based streaming and MP4 encryption algorithm for proposed DRM system.

• Information and Communications Magazine
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• v.31 no.9
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• pp.24-31
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• 2014

P2P기술은 사용자간 콘텐츠 데이터를 공유하기 위해 개발되었다. 그러나, P2P 기술이 저작물의 불법 공유에 주로 사용되고, ISP의 inter-domain 트래픽을 증가시키는 등의 문제로 인해 많은 지탄을 받아왔다. 그러나, P2P 기술이 가지는 높은 확장성(Scalability)과 동시 사용자 수에 비례한 전달 성능 등에 주목하여 P2P의 개념을 다양한 서비스에 접목함과 동시에 inter-domain traffic문제를 해결할 수 있는 방법들이 제시되었다. 이 노력의 일환으로 IETF ALTO WG[1]에서는 ALTO 프로토콜[2]을 2014년 3월에 RFC6708로 제정하였으며, IETF PPSP WG[3]에서는 P2P를 이용한 멀티미디어 스트리밍 프로토콜을 개발하고 있다. 본 고에서는 P2P기반 콘텐츠 전달 기술에 대한 소개와 더불어 IETF PPSP WG에서 진행중인 P2P기반 스트리밍 프로토콜 표준 기술을 분석하고, IETF 표준화 동향에 대해 알아본다.

• Journal of Digital Contents Society
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• v.6 no.4
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• pp.243-248
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• 2005

In this paper, We proposed joint-modulation CDMA system for efficient streaming transmission. and, We analyzed joint-modulation CDMA system using nakagami fading model and impulsive interference model for transmission channel environment. Also, it can being compensate the performance degradation by using MRC diversity scheme and BCH coding scheme.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.05a
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• pp.561-563
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• 2015

The majority of current streaming services are particular S/W I a separate setup program supports real-time streaming service a reality, will be stored until the end of the video, save for a video about editing and is not available. In this paper, allows the user to save and apply the multi threaded techniques for video based on a system without a separate plug-ins, or installation of programs HTML5 by taking advantage of Web content authoring, real-time streaming system using a Web browser. This saves the video streaming in real time can be used for editing and, on real-time communications and media sharing and streaming Web service you need and will be utilized in the field.

• The Journal of the Korea Contents Association
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• v.8 no.10
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• pp.20-26
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• 2008

The quality of stream remaking is decided the load of a server and Jitter through the traffic of the transmission path between end to end. In order to improve these problems in this paper, I propose tree construction method of low-delay-level-multicast. In this case which the network congestion will be occurred by streaming quality, I also propose the technique which dynamically changes the transmission path. This technique first constructs the overlay structure for relaxing the overload of server. Secondly, in order to decrease Jitter of client, it makes upload bandwidth and low latency balanced. In the evaluation of the performance, this paper showed better enhancement of about $15%{\sim}24%$ than P2CAST[4] in the simulation about node average join count, average bandwidth, service request refusal ratio, RTT measurement of nodes, and node average join count by defect ratio.

• The Journal of the Korea Contents Association
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• v.10 no.9
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• pp.36-44
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• 2010

In this paper, we propose video quality control system(VQCS) which can control video service quality through the monitoring of end-to-end available bandwidth for video streaming service like IPTV in NGN convergence network. Various multimedia services such as video, voice and gaming service can be provided by IPTV, and these services require large amounts of bandwidth. At this time, video quality degradation like video jerkiness, block distortion and blurring is caused when network available bandwidth is insufficient. Available bandwidth monitoring method is need to stably control video streaming quality. So, we periodically calculate the amount of the packets in link and measure available bandwidth by using total length field in IP header at terminal. Scalability extractor in network selects suitable video streaming data rate based on available bandwidth and transports video streaming with adaptive data rate to prevent video quality deterioration.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2014.05a
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• pp.574-577
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• 2014

Multimedia contents sharing services based on DLNA (Digital Living Network Alliance) technology such as Allshare or Smartshare in wireless home networks is widely adapted in Korea. However, the characteristics of the wireless network - frequently fluctuated bandwidth and signal strength could degrade the quality perceived by users. To minimize the impact of the challenge there are active researches in dynamic adaptive streaming. This paper proposes a dynamic adaptive streaming approach designed in a wireless network taking into account of the specifications of the user device such as resolution and processor. We modify the Kalman filter considering the characteristics of the device and demonstrate that the proposed approach determines Bit Rate using the modified filter.

• Journal of Broadcast Engineering
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• v.27 no.4
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• pp.548-560
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• 2022

Video based Point Cloud Compression (V-PCC) is one of the compression methods for compressing point clouds, and shows high efficiency in dynamic point cloud compression with movement due to the feature of compressing point cloud data using an existing video codec. Accordingly, V-PCC is drawing attention as a core technology for immersive content services such as AR/VR. In order to effectively service these V-PCC contents through a media streaming platform, it is necessary to encapsulate them in the existing media file format, ISO based Media File Format (ISOBMFF). However, in order to service through an adaptive streaming platform such as Dynamic Adaptive Streaming over HTTP (DASH), it is necessary to encode V-PCC contents of various qualities and store them in the server. Due to the size of the 2D media, it causes a great burden on the encoder and the server compared to the existing 2D media. As a method to solve such a problem, it may be considered to configure a streaming platform based on content obtained through V-PCC content encoding based on SHVC. Therefore, this paper encapsulates the SHVC-based V-PCC bitstream into ISOBMFF suitable for DASH service and proposes a configuration method to service it. In addition, in this paper, we propose ISOBMFF encapsulation and DASH configuration method to effectively service SHVC-based V-PCC contents, and confirm them through verification experiments.

• Proceedings of the Korean Society of Broadcast Engineers Conference
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• 2017.11a
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• pp.118-119
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• 2017

스마트폰 기반의 모바일 플랫폼이 발달하면서 관련 서비스에 대한 수요가 급증하고 시공간의 제한 없이 누구든지 방송 콘텐츠를 제작 및 송수신 가능하게 되었다. 이에 본 논문에서는 학회 또는 세미나와 같은 컨퍼런스에서도 모바일 기반의 스트리밍 플랫폼 서비스를 제공하고자 웹캠을 통해 영상을 획득하고, 획득한 영상을 사용자 개인의 모바일 어플리케이션을 통해 실시간 스트리밍 시청 및 VOD 서비스를 제공하는 시스템을 개발하였다. 실시간 스트리밍 시청, VOD 서비스 등 다양한 기능을 탑재함으로써 기존의 컨퍼런스 관련 모바일 어플리케이션보다 더 많은 정보 제공 및 사용자 편의성 향상이 가능하다. 이 시스템을 제공함으로써 사용자는 컨퍼런스 발표 현장에 있지 않더라도 개인 모바일 어플리케이션을 통해 정보를 보다 쉽게 제공받을 수 있을 것으로 기대된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2009.05a
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• pp.105-107
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• 2009

In this paper we research Multi-Streaming Internet Radio Platform to broadcast music contents in large outlet and between spaces. we concentrate on methods how to configure NAT for user's using Internet, Application for Multi-Channel Connection and Hardware Path for Multi Stream.