手机电视标准应用与运营模式探讨

随着我国数字电视地面传输标准DMB-TH的出台，手机电视标准亦成为业界研究讨论的热点。针对目前国际上比较成熟的几种手机电视解决方案，包括欧洲的DVB-H、韩国的T-DMB以及我国自主产权的DMB-TH和STiMi，从系统架构、核心技术和节约功耗技术的层面一一作了介绍，对总局大力支持的多媒体广播技术STiMi予以了充分的认同。同时，对我国手机电视的运营模式作了简要的分析和展望。     

Imagination Technologies为中国多标准手机电视做准备

电视被视为尚未集成到手机上的最后一种媒体。在中国的3G牌照依然还是个未知的“X”的情况下,利用地面或者卫星广播系统传输电视信号的方式更为可取。由于2008奥运会的迫近,我国移动多媒体行业标准(CMMB)也在最近由广电总局正式发布。但是推荐性标准不等同于强制标准,至少目前看来,CMMB显然还不足以强势到一统手机电视业界。除此次被扶正的STiMi标准外,新岸线公司在DAB基础上开发的T-MMB,清华大学基于地面数字电视标准推出的DMB-TH,还有已经成功在上海和广东地区开播的T-DMB,再考虑到有手机巨头公司提供技术支持的DVB-H和Medi…     

我国正式颁布手机电视行业标准采用自主技术

国家广播电影电视总局10月24日正式颁布了自主研发的移动多媒体广播行业标准，即通常所说的手机电视标准，确定采用我国自主研发的手机电视技术标准STiMi，确立了今后大规模市场推广的基础，该标准将从今年11月1日起实施。     

手机电视国标出台与产业发展的三个问题

近日，广电总局终于正式宣布STiMi“天地一体”技术为我国手机电视的传输国家标准。让我们对手机电视在国内的发展多了份期待。然而，国家标准的确定是否一定能带来手机电视产业的发展呢？     

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。     

手机电视未采用广电标准 缺乏约束力遭置疑

2006年10月25日消息，广电方面宣称，手机电视标准中的核心部分传输技术已基本确定采用广电系统自主标准STiMi。对此，运营商方面向记者表示，至今没有收到信产部或是任何部门关于规定广电自主标准为手机电视标准的通知，手机电视最后执行哪个标准并不由广电单方面决定。     

移动电视前景广阔 齐凌微瞄准高性能调谐器Tune设计——访齐凌微电子CEO孙润华

从2006年DMB-TH标准的制定和发布,到近两年来CMMB手机电视市场的火热,移动电视市场一直倍受电子行业人士的关注,未来发展空间也不可限量。目前,中国已有多家公司推出了DMB-TH和CMMB标准的数字信道解调(Demodulator)芯片,     

广电抢先制定手机电视国标体制分割利益纠葛电信并不买账

随着STiMi标准被定为手机电视国家标准的尘埃落定,国标之争将告一段落,但接踵而来的利益分配和运营问题似乎更为扑朔迷离。     

行业纵横

数字电视地面传输标准出台 明年8月实施；我国自主产权手机电视标准STiMi将出炉；卫星电视开播在即 国家政策影响产业格局；北京数字电视转换试点全面启动；上海提出“村村通”理想解决方案：神州家家通。     

DMB-TH成中国数字电视地面广播标准ADI携手凌讯科技先发制人

我国数字电视地面传输标准一直是大家争论的焦点,而日前国家标准化管理委员会发布的DMB-TH标准将成为强制性国家标准,使这场长达5年之久的标准之争由此告一段落.DMB-TH标准的主要技术贡献者之一凌讯科技有限公司的共同创始人、副董事长和首席战略官董弘博士介绍说,目前国内已经使用的欧洲方案(DVB-T)、清华方案(DMB-T)和上海交大方案(ADTB-T)的地区必须在一年内转换成新的DMB-TH标准.他还透露指出,其实DMB-TH标准于半年前已经确定,主要以我国拥有自主知识产权的TDS-OFDM(时域同步正交频分复用)调制技术为基础,以多载波技术为主,融合了单载波技术,原有的清华方案的主要技术特点都会体现在DMB-TH标准中,在作为强制性地面传输标准的同时,也可以用于移动电视(Mobile TV).正是由于凌讯科技与DMB-TH标准的制定,使得凌讯科技和ADI能够先发制人,率先排兵布局推出DMB-TH移动电视接收机解决方案.     

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