电信运营商视频业务发展的关键问题研究

近年来OTT TV（互联网视频）业务快速增长,发展速度超越了IPTV（互联网电视）,带来显著的“鲶鱼效应”,业界普遍认为“IPTV＋OTT”是电信运营商应对OTTTV冲击的有效手段。文章对“IPTV＋OTT”的业务发展策略、终端发展策略、技术发展策略等关键问题进行研究．对电信运营商网络视频业务的可持续发展具有重要的借鉴意义。     

电信运营商网络视频业务持续发展的关键问题

对“IPTV（互联网电视）加OTT TV（互联网视频）”的业务发展策略、终端发展策略、技术发展策略等关键问题进行了研究。业界普遍认为“IPTV加OTT”是电信运营商应对OTT TV冲击的有效手段。     

电信运营商OTT TV业务网络建设探索

简述OTT TV(互联网电视)业务在国内外的发展情况,介绍电信运营商IPTV(交互式网络电视)业务网络现状和特点,分析OTT业务对网络建设的挑战和要求,提出电信运营商结合现有IPTV网络基础建设OTT TV业务网络的实现方案,重点论述内容注入、内容管理、网络承载、内容分发等几个重点问题的实现方式,从网络规划、建设的角度为电信运营商发展OTT业务提供借鉴思路。     

电信运营商在IPTV基础上与OTT融合发展

已拥有IPTV基础的电信运营商面临OTT的挑战时,唯有采取优势互补策略,积极引入OTT业务,才会迎来更大的发展空间。由于OTT TV代表着未来的趋势,IPTV只是一个中间过渡产品,而IPTV与OTT TV的业务形态和使用感知上并无本质上的差异,都是基于IP网络提供的业务,二者区别只在于IPTV是在电信运营商专设的虚拟专网上运行,独享带宽,而OTT TV则"跑"在公共互联     

电信运营商IPTV+OTT业务网络承载方案简析

随着互联网、移动互联网的飞速发展,媒体、通信等产业开始呈现出跨界融合的趋势。2012年,OTT(互联网视频业务)取代三网融合成为视频行业最炙手可热的词汇。文章阐述电信运营商承载网络的现状及面临的挑战,分析IPTV业务网络承载的现状以及IPTV+OTT业务网络承载面临的挑战,提出IPTV+OTT业务网络承载方案,对方案的利弊进行比较,旨在为电信运营商承载网络承载IPTV+OTT业务提供参考。     

做好电信级OTTTV运营的思考

随着互联网开放竞争的环境,利用运营商的管道,一系列的OTT业务如雨后春笋快速地发展起来。OTT TV技术体系年轻,吸取了互联网技术的精华,业务更加灵活,部署更敏捷,竞争形势更严峻。这种基于运营商的管道之上的互联网电视更是要求我们要去思考如何做出区分于互联网厂商的电信特色。文章从基础管道建设、用户操控体验及OTT TV首页运营等角度进行阐述,目的在于从电信运营商角度去提升OTT TV的整体竞争优势。     

OTT TV和IPTV的技术比较分析

随着OTT TV业务的快速发展,对IPTV业务的发展带来了巨大冲击,因此有必要从业务现状出发对两种业务采用的不同技术实现方式进行研究。分别阐述了OTT TV和IPTV在编码技术、流传输技术和终端技术上的实现原理,并对两种业务技术实现的差异性进行深入比较,最后根据这些比较分析,发掘造成IPTV和OTT TV技术差异化的主要因素以及未来TV屏视频服务技术发展的方向和趋势。     

专题导读

正近几年,随着电信运营商宽带网络的升级改造,视频业务得到了长足的发展。既有广电牌照方与电信运营商合作,在有质量保障的宽带网络上面向电视机提供的IPTV业务,又有广电牌照方与家电厂商合作,在公众互联网上面向电视机提供的互联网电视业务(也即所谓的OTT TV业务),也有互联网视频网站在公众互联网上面向PC、Pad等终端提供的互联网视频业务。视频业务逐步向精细化、专业化、差异化的方向发展,视频业务形态逐渐趋同,高清和智能开始成为     

基于大数据分析的OTT TV与IPTV融合方案

OTT TV业务的出现加大了运营商“管道化”风险,提出一种基于大数据分析的OTT TV与IPTV融合方案,该方案根据音视频内容的点击率自适应地在OTT TV服务器与IPTV服务器间调度,充分提升IPTV专网的利用率,并降低热门资源访问对城域网的压力.     

应对OTT威胁,运营商应“强化内功” 对话中国移动通信集团公司互联网资源管理处秦越

为了应对OTT和大数据等业务侵袭,避免被"管道化"的结局,运营商强调通过四网协作加强"流量经营",并加强基础网络的建设,以此实现端到端的"智能管道"。OTT并不是电信运营商遇到的惟一难题,诸如云计算、大数据、物联网以及OTT TV等新兴的技术和业务,正在打破人们原有的生活和工作模式,电信运营商需要面对来自用户、市场、产业等方方面面的压力;但OTT却是电信运营商所面临的最棘手难题,短信/彩信已经被以微信为首的OTT业务大量侵蚀,从电信运营商的最新财报中短/彩信业务量下降20%已经可以看出苗头,而随后而来的微信电话本等一系列主导免费通话的OTT业务,更是将运营商     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

A rigorous proof of MIMO channel capacity’s increase with antenna number

It is well known that adding more antennas at the transmitter or at the receiver may offer larger channel capacity in the multiple-input multiple-output（MIMO） communication systems. In this letter, a simple proof is presented for the fact that the channel capacity increases with an increase in the number of receiving antennas. The proof is based on the famous capacity formula of Foschini and Gans with matrix theory.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks