• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.5
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• pp.875-878
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• 2006

In this paper, I design and implement a software streaming server platform which provides a software streaming service to geographically dispersed internet users. Through the use of QALoad, I verify the correct operation of implemented software streaming server platform.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.5
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• pp.926-929
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• 2006

In this paper, I propose a load balancing algorithm based on the traffic characteristics of a software streaming service, and implement the proposed algorithm on the large scale software streaming server platform which provides a software streaming service to geographically dispersed internet users. By showing that the large scale software streaming server platform fuctions correctly, we know the proposed load balancing algorithm is operating properly and efficiently.

• The KIPS Transactions:PartC
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• v.13C no.4 s.107
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• pp.501-510
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• 2006

Software streaming allows the execution of stream-enabled software on desktop or portable computing devices like PC, PDA, laptop, cellular phone, etc., even while the transmission/streaming from the server may still be in progress. In this paper, we present an efficient streaming system called Software On-Demand(SOD) streaming system to transmit stream-enabled applications in addition to automatic installation of program registry, environment variables, configuration files, and related components. In particular, we design and implement a SOD system in Linux to provide the user with the instant look-and-click software execution environment such that software download and installation are internally proceeded in a completely user-transparent way. Therefore, the SOD system relieves the user from the tricky, failure-prone installation business. In addition, the software developer now obtains a new, powerful means to advertise and propagate their software products since the user can use software packages via user-friendly UI window or web browser by look-and-click interactive operation. In the paper, we also make a couple of SOD streaming experiments using a spectrum of popular softwares. Based on the analysis of the experiment results, we also propose two performance improvement schemes.

• Journal of Korea Multimedia Society
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• v.14 no.7
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• pp.849-857
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• 2011

Gaming on demand(GOD) makes people enjoy games by encoding and transmitting game screen at a server side, and decoding the video at a client side. In this paper, we propose a fast game video encoder for multiple users over network with low-powered devices. In the proposed system, the computational complexity of game encoders is reduced by using scene descriptors, which consists of an object motion vector, global motion, and scene change. With additional information from game engines, the proposed encoder does not need to perform various complexity processes such as motion estimation and ratedistortion optimization. The motion estimation and rate-distortion optimization skipped by scene descriptors. We found that the proposed method improved 192 % in terms of FPS, compared with x264 software. With partial assembly code, we also improved coding speed by 86 % in terms of FPS. We found that the proposed fast encoder could encode over 60 FPS for real-time GOD applications.

• Proceedings of the Korean Information Science Society Conference
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• 2007.06d
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• pp.315-320
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• 2007

본 논문에서는 동시 접속자 수의 제약과 서버 증설에 의한 고비용 문제를 효과적으로 해결할 수 있는 실시간 웹캐스팅 시스템이 설계 구현된다. 기존의 시스템과는 다르게, 다양한 해상도를 지원할 수 있는 IP 카메라로부터 실시간으로 스트리밍 되는 동영상 데이터를 콘텐츠로 하는 라이브 웹캐스팅과, 저장 공간에 저장된 후, 사용자 요구에 따라 파일 데이터를 콘텐츠로 스트리밍 하는 주문형 비디오(VOD) 서비스 모두를 포함하는 total 시스템이다. 압축률이 높은 마이크로소프트사의 WMV(혹은 VC-1) 형식의 동영상 데이터를 사용함으로써 사용 대역폭을 줄여, 많은 Tuner들을 수용할 수 있도록 하였으며, 각 Tuner는 미디어플레이어를 뷰어로써 사용할 수 있도록 하여 시청자들이 별도의 소프트웨어를 설치하지 않도록 하였다. 가능한 모든 시스템 구성 요소들 또한 마이크로소프트에서 제공되는 유틸리티들을 사용할 수 있도록 하여 기존 시스템과의 호환성을 최대화 시켰으며, 특히, Caster, Distributor, 그리고 Tuner, 3 부분으로 나누어, Caster의 규모, 혹은 Tuner의 규모에 따라 Distributor의 확장이 모듈 단위로 가능하도록 하였다.