Classification of N-Screen services, scenarios and its standardization

Abstract

Abstract-By the advent of IPTV and smart TV, the broadcasting is transmitted using Internet. Bi-directional programs are appeared on broadcasting services. The convergence service combining with communication, information and web service are appeared too. N-Screen service is a killer service of smart TV. It uses several terminals, either fixed or mobile, to provide bi-directional, convergence and personal services with broadcasting service. N-Screen service can be classified into three categories: first, OSMU (One Source Multi Use) case, providing same contents to terminals having different capabilities such as screen size, CPU speed, memory, codec, network speed, etc. Second case is a vertical handover, continuous watching of content using different terminal. Third case is a collaborative service among multiple terminals. For example, a customer is watching soap opera using TV, while watching a specific scene related information or advertisement using his PAD or smart phone. In ITU-T SG13, the Y.sof (Service Scenario over FMC) was standardized. It defined detailed overall service scenarios using feature extraction of seamless mobile convergence service on several networks such as WiFi, 3G, WiMAX/WiBro. This standard extracts key features of five key elements: person, terminal, network, content, and service. Then, it analyzes relationships among key elements and suggests overall service scenario model. The service scenario model can be easily adopted on describing N-Screen service scenario because Y.sof handles scenario cases among several fixed or mobile terminals. In this paper, I will introduce Y.sof and classification of N-Screen service scenarios described using the standard. Also I will refer the standardization issues of N-Screen and its technologies.

An Application Framework for Trend Surfing System based on Multi-aspect, Multi-screen and Multimodal User Interface

“…Multi-screen systems in the area of TV can be classified into three cases [2]. The first case is when users watch content using screen devices having different specifications.…”

“…In particular, research and development is aggressively progressing in the area of IP TV [1], [2], [3] or Smart TV [4] which has merged broadcasting and communication. Although these multi-screen systems relating to TV media have different features, they have one feature in common: an advanced interactive user interface.…”

WebRTC-Based Remote Collaborative Learning Platform

“…이러한 웹 전반의 성능 발전과 함께, 실시간 원격 학습에 사용될 수 있는 다양한 웹 어플리케이션이 개발되고 있다. 특히 최근 다양한 화 상회의 서비스들 (Google Hangouts [13] , Skype 등)은 [14] , 웹 기반 N스크린 기술로는 Javascript 기반의 라이브러리인 Shift.io가 있다 [15] . [17] .…”

Wireless Channel Management Scheme for ASMD Groups in Wireless N-screen Services

“…The initial N-Screen service has begun from three-screen services of AT&T in 2007 and has meant the service that enables the users to utilize content with various ways by connecting TV, PC, and mobile phone the most commonly used by users [1][2]. In recent years, as various kinds of smart devices such as smart phones are emerging, and the subject of communication such as M2M (Machine-to-Machine) have expanded, services that target various devices reborn as a new convergence services through a continuing evolution from OSMU (One Source Multi Use) to ASMD (Adaptive Source Multi Device) N-screen services [1][2][3].…”