猜想10 手机电视能否如期推出?TD手机电视完成商用准备

手机电视标准解析 手机电视是指利用移动终端为用户提供移动多媒体/视频资讯的业务.手机电视作为一个新兴的产业和3G时代最具吸引力的核心业务之一,随着我国3G脚步的临近和2008年北京奥运会的到来正面临着前所未有的发展机遇.     

手机电视业务市场现状及应关注的问题

手机电视作为一种新的信息服务方式和媒体形态,它给信息产业带来了新的发展机遇和挑战。文章分析了手机电视的运营模式,综观国内外手机电视的市场现状,论述了面向终端的数字电视广播网络标准,最后对手机电视的发展前景进行了展望。     

手机电视产业发展分析

文章介绍了我国手机电视产业发展现状,并对其发展瓶颈和发展趋势做了分析,指出终端芯片是制约我国手机电视产业发展的瓶颈之一。     

山西省多媒体手机电视技术发展的思考

介绍了手机电视的概念及分类,对移动流媒体手机电视和广播式手机电视标准进行了比较,阐述了我省手机电视发展的现状,并对未来我省手机电视技术的发展方向进行了探讨和分析。     

手机电视困惑标准之争

手机电视与其他新技术一样，“标准”是这个领域的制高点。中国目前还没有确定最后的手机电视标准，目前正有国内外8个标准各自为政，进行着激烈的角逐。而标准不统一的现状又使得制造业厂商们裹足不前，严重影响了手机电视产业的发展。     

手机电视商业模式探讨

一、诺基亚手机电视商业模式 诺基亚手机电视服务体系包括手机终端、服务商和网络三个部分,囊括了该产业中的各个利益集团.网络标准采用的是DVB-H技术,已获欧洲电信标准协会(European Telecommunications Standards Institute)批准.     

手机电视终端的实现及发展

如同任何新鲜事物的出现一样,手机电视的出现也产生了许多问题:标准的多样化、技术的不成熟以及产业链的不完善等,这些问题成为目前制约手机电视产业良性发展的主要原因.     

国内手机电视发展综述

手机电视是在手机上收看电视节目的业务,通过介绍手机电视的实现方式、业务发展以及主要标准,对国内手机电视的发展进行了综述,结合对国内手机电视发展中存在问题的分析提出了一些看法,并对国内手机电视发展的前景作了展望。     

数字电视与移动多媒体广播技术及标准的探讨

随着3G在全球的迅猛发展以及手机数据处理能力、屏幕分辨率的提高，手机电视业务被视为3G时代最具发展前景的移动增值业务之一。目前，欧、美、日、韩等国的运营商已纷纷推出手机电视业务并取得较好成绩。在我国，中国移动和中国联通两大移动运营商从2004年就开始运作手机电视业务，现已开始在一定范围内进行试商用。手机电视强大的市场发展潜力让业内人士对其未来前景一致看好，但是目前该业务受到网络速率低、标准不统一、手机终端价格高、节目内容少、费用高、管制政策不明朗等因素困扰，手机电视如何才能在我国得到最好的发展成为人们关注的焦点。为此，《移动通信》杂志本期开辟“手机电视”技术专题，与国内外专业人士一起就手机电视的标准、频率使用、市场与业务进展、终端、实现方式与商业模式等方面的问题进行全面的研究和探讨，以期对我国手机电视产业的研究与发展提供借鉴和参考。 本期专题我们特别邀请了上海贝尔一阿尔卡特公司段军和朱小刚先生担任特邀编审专家，他们对专题的选题、文章的审定、整体内容的把握等方面给予了诸多建议和支持。在此，本刊编辑部对他们的辛勤工作表示衷心的感谢![编者按]     

手机电视标准STiMi已曝光T-MMB也欲成国标

我国自主知识产权的手机电视标准——STiMi计划在今年年底完成地面补点试验网的建设，同时进行系统试验。这是笔者从北京国际广播电影电视设备展览会上获悉的。     

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.     

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.     

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.     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first