• Proceedings of the Korean Society of Broadcast Engineers Conference
• /
• 2011.07a
• /
• pp.46-49
• /
• 2011

최근 진행되고 있는 미디어 융합 환경에서 가장 주목 받고 있는 서비스는 N-스크린 서비스라고 할 수 있다. N-Screen 서비스가 무선 환경뿐만 아니라 이동환경에서도 안정적으로 제공되기 위해서 필요한 핵심 요소기술은 클라우드 컴퓨팅 기술일 것이다. 최근에는 통신 사업자를 비롯한 가전 제조사, 인터넷 및 플랫폼 사업자들이 각자의 강점을 살려서 다양한 클라우드 컴퓨팅 기반의 N-스크린 서비스를 제공하기 시작했고 핵심 서비스로 발전시켜 나가고 있다. 본 논문에서는 클라우드 컴퓨팅과 N-스크린의 관계, 주요사업자들의 서비스 현황 및 발전에 필요한 기술적 요구사항에 대해 알아보겠다.

• Journal of Digital Convergence
• /
• v.10 no.10
• /
• pp.465-473
• /
• 2012

The mobile devices and cloud computing technology introduced new content services such as N-Screen service. The DRM techniques have been developed to support interoperability and multi-platform for new environment of content service. Nevertheless, it is still inconvenient for the consumers to purchase a new DRM-supported device or to migrate some purchased contents into new device due to the change of the subscription of service. Therefore, in this paper, cloud-based DRM model which is referred as DRMaaS (DRM-as-a-Service) model, is proposed to allow the consumer to freely use and move some DRM-protected contents in various smart devices regardless of subscription of service.

• Journal of the Korea Society of Computer and Information
• /
• v.19 no.9
• /
• pp.11-19
• /
• 2014

In this paper, we propose a real-time video transcoding scheme for N-Screen service based on cloud computing. This scheme creates an intro-block and several playback blocks by splitting the original video. And there is the first service request, after transmitting the intro-block, transmits the playback blocks that converting the blocks on real-time. In order to completing trans-coding within playback time of each block, we split and allocate the block to node according to performance of each node. Also, in order to provide real-time video playback service, the previous scheme convert original video into all format and resolution. However we show that the proposed scheme can reduce storage usage by converting original video into format with proper resolution suitable to device and platform of client. Through simulation, we show that it is more effective to real-time video playback for N-screen service than the previous method. We also show that the proposed scheme uses less storage usage than previous method.

• Proceedings of the Korean Information Science Society Conference
• /
• 2012.06a
• /
• pp.16-17
• /
• 2012

본 논문에서는 클라우드 컴퓨팅 환경에서 N-스크린 서비스를 위한 동영상 콘텐츠의 분산 인코딩 기법을 제안한다. 이 기법은 Hadoop에 기반하여 인코딩 작업을 여러 가상머신에서 분산 실행하는데 각 가상머신의 작업량을 가상머신의 성능에 따라 다르게 할당한다. 성능에 따른 차등할당으로 가상머신의 유휴(idle)시간을 최소화하여 총인코딩시간을 단축시키고, 자원 활용도를 높일 수도 있다. 실험을 통하여 제안한 인코딩 기법이 균등분할 방식보다 짧은 시간에 인코딩을 완료함을 보인다. N-스크린 서비스는 같은 동영상을 다양한 디바이스 특성에 맞추어 여러 가지 해상도로 스트리밍 해야 하기 때문에 인코딩 소요시간을 단축함으로써 서비스의 성능 향상을 기대할 수 있다.

• Journal of Digital Convergence
• /
• v.12 no.5
• /
• pp.255-261
• /
• 2014

This paper intends to suggest methods to design and implement a jQuery mobile based system in a future mobile webapp environment through a study on an N-Screen application in a mobile webapp. N-Screen is one of the representative services of cloud computing. It is promoted by the need of users to require universal functions for all devices. However, this situation is in conflict with the users' need to have the same experience and N-Screen cannot deal with these disparate services. Thus, this study intends to suggest a system analysis, structure of design, and a framework by implementing the N-Screen based movie reservation system in the jQuery mobile environment.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2013.01a
• /
• pp.7-8
• /
• 2013

본 논문에서는 클라우드 컴퓨팅에서 N-스크린 서비스를 위한 실시간 재생 기법을 제안한다. 이 기법은 동영상을 분할하여 블록을 생성하고, 해당 블록을 변환하여 실시간으로 재생한다. 또한, 요청된 포맷에 따라 변환하는 방식으로 여러 디바이스에 최적화하여 실시간으로 재생 서비스를 제공할 수 있기 때문에 스토리지 사용량도 기존 동영상 서비스 방식에 비해 유리하다.

• Journal of the Korea Society of Computer and Information
• /
• v.19 no.6
• /
• pp.1-10
• /
• 2014

In this paper, we propose a real-time video playback scheme for the N-Screen service based on Windows Azure. This scheme creates several playback blocks based on the performance of each node by non-uniform splitting of the original video. To reduce transcoding-time, it allocates the playback blocks to a corresponding node by transcoding the playback blocks. Through the simulation, we show that it is more effective to use real-time video playback for the N-screen service than the previous method. The proposed scheme splits an AVI format 300MB source video with non-uniform playback blocks. It allocates the playback blocks to the heterogeneous node of Windows Azure, the commercial cloud system and measures of transcoding-time by transcoding non-uniform playback blocks to mp4 and Flv format. As a result, the proposed scheme improves the performance of the N-screen service based on Windows Azure compared to the previous uniform split strategy.

• Proceedings of the Korean Society of Computer Information Conference
• /
• 2012.07a
• /
• pp.7-8
• /
• 2012

본 논문에서는 클라우드 플랫폼인 Windows Azure를 사용하여 N-스크린 서비스 구현 방법을 제안한다. 이 방법은 클라우드 컴퓨팅 환경에서 Map/Reduce 기법을 사용하여 대용량 동영상 콘텐츠를 분할하고, 인코딩한다. Windows Azure의 Web Role에서는 사용자가 요청한 인코딩 작업을 수신하고, Worker Role에서는 요청받은 인코딩 작업을 처리한다. Windows Azure의 많은 가상머신에 인스턴스를 할당하여 처리함으로써 인코딩 소요시간을 단축할 수 있다.

• Journal of Digital Convergence
• /
• v.10 no.1
• /
• pp.277-291
• /
• 2012

Smartphone (smartpad) and cloud computing has grown rapidly. So, the users started getting interested in multi-screen services. However, various OS / platforms due to the increased content development time and cost. Increase the cost of content development for a multi-screen service, it has been an obstacle. To solve this problem in this study, HTML5-based multi-screen service platform standards specification was established. HTML5 is a specification of the next generation of Web standards. Standards specification established by this study were research in terms of the service provider. And, this standards specification can be used independently of the service infrastructure and device. In addition, this standards specification in order to develop a multi-screen services are efficient and easy to use. For verification adequacy of standards specification established in this study, Scenarios technical entries were mapped by standard specification entries.

• Journal of the Korea Convergence Society
• /
• v.10 no.3
• /
• pp.395-400
• /
• 2019

The Web environment of the frontend domain is increasingly competitive to preempt the new standard of presentation layer. N-Screen, a service that enables users to seamlessly use one content in various devices in Korea, is competing for market preemption by recognizing it as a core service of the future. In the cloud computing, N-screen is a typical service type. However, most of the frontend research required for groupware in enterprise environments has been limited to responsive web design for the web and native apps for mobile. Gradually, the need for MVC design patterns is increasingly widening in enterprise environments to overcome the cultural differences of companies and to support one source multi-use strategy supporting multiple devices and development productivity. Therefore, in this study, we will analyze and design JPetStore with hybrid application design based on Spring MVC, e-government standard framework environment of next generation web standard, and provide reference model of frontend hybrid apps design in future enterprise environment.