• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.791-793
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• 2015

Recently, UCC (User Created Contents) and VoD (Video on Demand), and multimedia content are growing, IP-TV, Smart TV, OHTV (Open Hybrid TV) various services such as multi platform (Multi-platform) environment, services and QoS issues. To solve this problem, the network efficiently, and improve the quality of content is necessary for the system. In this paper, the network of channels State and transmission of multimedia data based on dynamic resource usage, TCP and UDP, Adaptive dual-streaming system used for design and analysis. In addition, the existing TCP and UDP streaming system using a single protocol for analysis and verification of the effectiveness of the difference between and. This is a disaster, and medical/first aid system will be utilized in the field of feed, are ubiquitous.

• Journal of Internet Computing and Services
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• v.15 no.6
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• pp.1-8
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• 2014

As the e-learning spreads widely and demands on the internet video service, transmitting video data for many users over the Internet becomes popular. To satisfy this needs, the traditional approach uses a tree structure that uses the video server as the root node. However, this approach has the danger of stopping the video service even when one of the nodes along the path has a some problem. In this paper, we propose a video-on-demand service that uses multiple paths. We add new paths for backup and speed up for transmitting the video data. We show by simulation experiments that our approach provides a high-quality of video service.

• Journal of Korea Multimedia Society
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• v.25 no.3
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• pp.546-557
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• 2022

Recently, the demand to interpret image data with artificial intelligence in various fields is rapidly increasing. Object recognition and detection techniques using deep learning are mainly used, and video integration analysis to determine unstructured object recognition is a particularly important problem. In the case of natural disasters or social disasters, there is a limit to the object recognition structure alone because it has an unstructured shape. In this paper, we propose intelligent video integration analysis system that can recognize unstructured objects based on video turning point and object detection. We also introduce a method to apply and evaluate object recognition using virtual augmented images from 2D to 3D through GAN.

• Journal of Korea Multimedia Society
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• v.1 no.1
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• pp.1-17
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• 1998

Video information is an important component of multimedia systems such as Digital Library, World-Wide Web (WWW), and Video-On-Demand (VOD) service system. Video information has hierarchical document structure inherently, so it is named "structure video document" in this paper. This paper proposes a data model, a query language, and an indexing scheme for structured video documents in order to store, retrieve, and share video documents efficiently. In representing structured video documents, the object-oriented data modeling technique is used since the hierarchical structure information can be modeled as complex objects. We also define object types for the structure information. Our query language supports not only content-based retrieval, which means the queries based on the structure of video documents, and spatial/temporal relation for video documents. In order to perform structure queries efficiently, as well as to reduce the storage overhead of indices, an optimized inverted index structure is proposed.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.23 no.7
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• pp.837-844
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• 2019

As the demand for video streaming has been rapidly increasing recently, video streaming schemes for increasing the efficiency of radio resource has attracted a lot of attention. In this paper, we propose an adaptive video streaming scheme to enhance the efficiency of video streaming by using receivers' caching capability. The proposed streaming scheme can transmit video data on a broadcast basis even when two clients request different video data, only if specific conditions satisfied, while existing schemes can only transmit video data on a broadcast basis only when two clients request the same video data. In this paper, we mathematically derive the average transmission time of the proposed scheme and the approximation of the average transmission time. The accuracy of the mathematical analysis is verified by simulations. Mathematical analysis and simulation results show that the proposed scheme can significantly reduce the average transmission time, compared to the existing scheme.

• Korean Journal of Artificial Intelligence
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• v.2 no.1
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• pp.1-3
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• 2014

These days, interest and demand on smart learning has rapidly increased. Video English and mobile system based English speaking service have become popular. This study gave prototype of application to give and take voice message with world people and to give new concept of voice pen-pal beyond exchange of text messages. In modern society having rapidly increasing demand on smart learning, you can study foreign language by smart phone and communicate with foreigners by voice anytime and anywhere. The app allows global exchange to learn conversation. Recruitment of initial users and profit model have problems. We shall develop to improve problems and to solve difficulty.

• Journal of Internet Computing and Services
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• v.17 no.4
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• pp.145-159
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• 2016

This study points out the problems of absence of the legislation for standard regulation on Video on Demand(VoD) advertisement which grows so fast lately, for this it recommends making legal references, which have the definition of non-linear broadcasting & VoD advertisement and VoD advertisement standard regulation in the merged Broadcasting Act, and adopting co-regulation system. Pay TV operators providing VoD service have the opportunities to make money as subscribers uses it increasingly. In case of linear service, the Broadcasting Act regulates the advertisement strictly, but not the VoD ads. The reason why is that Korean legislation including the Broadcasting Act does not have legal reference to regulate it, instead of that, it rely on the self-regulation system which is operated by pay-tv players who provide the VoD ads. So, there is the limitation to protect the minors such as children and youth from the harmful VoD ads, to be invulnerable for advertisers to influence to advertising agents, and to ensure the regulatory effectiveness under player-centric self-regulatory regime. In this context, this study analyses the how to regulate VoD ads standard with a three-pronged approach. First, it analyses the VoD ads regulation system in overseas countries, UK, Canada, EU and Ireland. Each country has the legal reference to regulate it in the Broadcasting Act or lower statures and adopts the co-regulatory regime the NRA and the 3rd entity operate together. Second, it reviews the objectives and scope of VoD ads standard. This study recommends that the objective of it is users protection and the scope of it is standard regulation not commercial practice. Third, this study researches how to legislate for regulation of VoD ads standard. Considering VoD service's characteristics(non-linear service) and legal position of Ads agency(i.e. pay tv operators), it suggest that legal reference will be in the integrated Broadcasting bill, which is the general law, not individual. If it is available to regulate VoD ads standard with co-regulatory regime, it expects the enhancement of user protection from the harmful VoD ads and make up sustainability of the pay-tv players' self-regulation.

• The Transactions of the Korea Information Processing Society
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• v.7 no.11
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• pp.3519-3533
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• 2000

In a VOD(Video-On-Demand) system, I/O performance and storage requirements are generally more important than computing capability, Due to the development of CPU tecnology, the gap between the performance of processors and desk speed are widening. Therefore, the disk system typically becomes the bohleneck ina VOD system. In order to allevte those effects from physical constramts, disk array system is used. The I/O performance of disk arrays can be improved by the capability of processors, I/O schefuling polcy, the number of member disks in the array, disk block size, block placemet method etc. In this paper, we considered the disk scheduling schemes including EDF( Earliest Deadine First), SCAN, SGAN-EDF, Round-robm. GSS(Grouped Sweeping scheme), and C-SCAN, LOOK, C-LOOK which are variations of SCAN Mamly focusing on those disk scheduling schemes, we performed the simulation in order to compare and eview the perionmance of disk arrays considening seveial related parameters under diverse environments and analyzed the effects of those parameters to the performance.

• Journal of KIISE:Computer Systems and Theory
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• v.26 no.11
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• pp.1296-1304
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• 1999

본 논문은 다수의 고객들에게 실시간 재생 서비스를 제공하는 주문형 비디오 서버에서 데이타 검색의 효율을 높이기 위한 저장 시스템의 구조와 그에 따른 배치 정책을 제안한다. 주문형 비디오 저장 서버에서 동시에 보다 많은 고객들에게 그들이 원하는 서비스를 제공하기 위해서는 여러 분야에서의 다양한 정책들이 고려될 수 있으나, 특히 저장 매체들을 어떤 구조로 구성하고 여기에 비디오 객체들을 어떻게 배치할 것인가는 검색 효율과 직접 관계되는 중요한 문제이다. 본 논문에서는 디스크 배열 형태로 구성된 저장 시스템을 디스크 성능을 고려하여 재구성하고, 비디오 객체들을 저장할 때 저장하고자 하는 데이타의 특성들과 저장 구조를 함께 고려하여 검색 효율을 극대화할 수 있는 배치 방법을 제안한다. 마지막으로 제안된 정책의 검색 효율을 검증하기 위해 다양한 실험을 통하여 기존의 배치 정책들과 비교하고 성능을 평가한다.Abstract In this paper, we propose the structure of storage system and a placement policy to provide many clients with real-time playback services efficiently in VOD(video-on-demand) server. Though policies in various areas being considered to provide more clients with services of degree requested by them simultaneously in VOD storage server, it is important how to construct storage media and to place video objects on it for retrieval efficiency. In this paper, we reorganize a large disk array with disks performance and place video objects using the placement policy considering both characteristics of video data and the structure of storage system for maximizing retrieval efficiency. Lastly, we simulate the proposed policy and conventional policies through various environments, compare our policy with others n evaluate the performance of our policy.

• Annual Conference of KIPS
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• 2009.04a
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• pp.1116-1119
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• 2009

최근 그룹 통신 분야에서 전통적으로 대표되는 IP 멀티캐스트의 대안기술로서 호스트기반 멀티캐스트 및 P2P시스템은 기존의 IP 멀티캐스트의 단점을 극복하고자 하는 연구이다. 이러한 호스트기반 멀티캐스트는 사용자 중심의 서비스를 제공함으로써 다양한 네트워크 환경에서 누구나 사용자들이 효율적으로 데이터를 공유하게 해주고 있다. 본 논문에서는 이러한 협동 기반의 호스트 멀티캐스트를 사용하여 미디어 서비스를 제공하는 VOD 시스템 전반에 관한 연구를 수행하고 이러한 VOD의 서비스를 고도화 하고자 한다. 보다 구체적으로는 패칭 기법을 사용하여 사용자간의 전달 지연을 최소화 할 수 있는 효율적인 자료 전송 경로를 설정 방법과 주문형 비디오 서버를 위한 현실적인 호스트 기반 멀티캐스트 트리 구성 모델을 제시하고자 한다.