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。     

浅析OTTTV业务如何助力广电宽带网络发展

随着三网融合的全面推进,以及信息技术的飞速发展,广电业在数字化整转之后迎来了一个快速发展的黄金机遇期。面对人们差异化、个性化、碎片化的娱乐需求,广电业正发生着深刻的变化,OTT TV(Over-The-Top TV)正是在此背景下应运而生。由于具备丰富的内容、快捷方便互动的体验和友好的界面,OTT TV深受用户青睐,必将成为未来趋势。从OTT TV业务的特点和市场发展分析入手,提出OTT TV作为广电未来业务发展的趋势,通过对广电宽带网络技术及其发展的原动力的阐述,指出了OTT TV业务对广电宽带网络发展的驱动和技术发展对OTT TV的引领,最后从平台、网络、终端、运营支撑4个方面谈OTT TV业务的助推作用。面对增值业务的蓬勃发展,广电运营商更要加快下一代广播电视网络的建设与发展,实现广电业的快速转型。     

基于云平台下的OTTTV的技术方案与发展趋势

认为OTT TV不仅可以获得很好的用户体验,还可以把丰富的互联网业务引入到电视业务中,实现电视使用的丰富化和个性化,因此OTT TV已超越交互式网络电视(IPTV)成为广电行业的发展趋势。介绍了中兴通讯提出的低码高清与OTT TV多屏融合的解决方案,该方案即可以让运营商充分发展OTT业务,扩展更多的增值业务,实现盈利增长;又可以为用户提供随时随地且清晰流畅的视频体验,最大程度提升用户业务使用体验感受。     

从互联网走向电视机——OTT TV的兴起与有线网络的应对思考

本文认为OTT TV是互联网向传统视频服务市场扩张的必然结果,分析了美国和我国OTTTV的发展历程和异同,讨论了我国有线网络运营商如何应对OTT TV的挑战,认为OTTTV的发展不可阻挡,有线网络必须积极融入OTT TV,在OTT产业链中寻找发展机会,要先“做管道”,大力发展互联网接入业务,并在此基础上推出有广电特色的OTT终端和OTT TV内容服务.     

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。     

IPTV与OTT TV业务的发展现状及趋势

首先阐述了IPTV与OTT TV业务的定义以及发展现状,并着重分析了二者在业务模式、技术实现等方面的差异,其次从用户角度描绘了未来电视的主要形态,并详细分析了IPTV与OTT TV业务最终的发展趋势.     

透视三网融合下的TV屏业务

从三网融合下TV屏业务的内涵与外延分析出发,对新形势下典型的TV屏业务——有线数字电视、IPTV和OTT TV——的产品特点、产业价值链和产业成熟度、市场表现、业务模式和发展前景进行了深入的比较分析,以供各方参考。     

基于云平台互联网多屏电视系统特点简介

随着OTT TV技术的发展与成熟,在我国通过公共互联网面向用户传输传统视频内容成为共识。本文对OTT平台的功能和技术架构进行了阐述,介绍了从直播、点播、终端、多屏、接口各方面技术架构的具体特点。     

他们眼中的OTT TV

·定义篇· OTT的概念始终处于演进的过程,最初是指字面上的"Over the Top",即互联网公司越过运营商,发展基于开放互联网的各种视频及数据服务业务,强调服务与物理网络的无关性.OTTTV是"Internet TV"的泛指,即通过公共互联网面向电视传输的IP视频和互联网应用相融合的业务服务.到了2007年5月以后,国际上相继有了Apple TV,GoogleTV等OTT TV的概念性产品,从中透露出各有差异的广义概念.从2009年开始,OTT TV概念开始传入国内,业界对OTT TV开始了从混乱到基本清晰的认知过程.     

OTT TV时代广播电视直播业务的现状、发展与监管研究

OTT TV时代广播电视直播业务有充分的市场需求,本文分析了OTT TV时代广播电视直播业务现状、直播技术与盈利模式,研究了现阶段OTT TV直播业务的特点,探讨了广播电视直播业务的发展与监管。     

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.     

Curved crystal spectrometer for the measurement of X-ray lines from laser-produced plasmas

In order to diagnose the laser-produced plasmas, a focusing curved crystal spectrometer has been developed for measuring the X-ray lines radiated from a laser-produced plasmas. The design is based on the fact that the ray emitted from a source located at one focus of an ellipse will converge on the other focus by the reflection of the elliptical surface. The focal length and the eccentricity of the ellipse are 1350 mm and 0.9586, respectively. The spectrometer can be used to measure the X- ray lines in the wavelength range of 0.2-0.37 nm, and a LiF crystal （200） （2d = 0.4027 nm） is used as dispersive element covering Bragg angle from 30° to 67.5°. The spectrometer was tested on Shengnang- Ⅱ which can deliver laser energy of 60-80 J/pulse and the laser wavelength is 0.35 μm. Photographs of spectra including the 1 s2p ^1P1-1s^2 ^1S0 resonance line（w）, the 1s2p ^3P2-1s^2 1S0 magnetic quadrupole line（x）, the 1s2p ^3P1-1 s^2 ^1S0 intercombination lines（y）, the 1 s2p ^3S~1-1 s^2 ^1S0 forbidden line（z） in helium-like Ti Ⅹ Ⅺ and the 1 s2s2p ^2P3/2-1 s622s ^2S1/2 line（q） in lithium-like Ti Ⅹ Ⅹhave been recorded with a X-ray CCD camera. The experimental result shows that the wavelength resolution（λ/△ 2） is above 1000 and the elliptical crystal spectrometer is suitable for X-ray spectroscopy.     

Preparation and Characterization of TaN ALD Precursors

High purity organic-tantalum precursors for thin film ALD TaN were synthesized and characterized.Vapor pressure and thermal stability of these precursors were studied.From the vapor pressure analysis,it was found that TBTEMT has a higher vapor pressure than any other published liquid TaN precursor,including TBTDET,TAITMATA,and IPTDET.Thermal stability of the alkyl groups on the precursors was investigated using a 1H NMR technique.The results indicated that the tertbutylimino group is the most stable group on TBTDET and TBTEMT as compared to the dialkylamido groups.Thermal stability of TaN precursors decreased in the following order:TBTDET ＞ PDMAT ＞ TBTEMT.In conclusion,precursor vapor pressure and thermal stability were tuned by making slight variations in the ligand sphere around the metal center.     

Electronic Structure of Semiconductor Nanocrystals

This paper reviews our recent development of the use of the large-scale pseudopotential method to calculate the electronic structure of semiconductor nanocrystals, such as quantum dots and wires, which often contain tens of thousands of atoms. The calculated size-dependent exciton energies and absorption spectra of quantum dots and wires are in good agreement with experiments. We show that the electronic structure of a nanocrystal can be tuned not only by its size,but also by its shape. Finally,we show that defect properties in quantum dots can be significantly different from those in bulk semiconductors.     

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.     

Critical Stage Rule-Based Real Time Dispatch（RTD）System in Highly-Mixed-Products （HMP） FAB

An improving utilization and efficiency of critical equipments in semiconductor wafer fabrication facilities are concerned. Semiconductor manufacturing FAB is one of the most complicated and cost sensitive environments. A good dispatching tool will make big difference in equipment utilization and FAB output as a whole. The equipment in this paper is In-Line DUV Scanner. There are many factors impacting utilization and output on this equipment group. In HMP environment one of the issues is changing of reticule in this area and idle counts due to load unbalance between equipments. Here we'll introduce a rule-based RTD system which aiming at decreasing the number of recipe change and idle counts among a group of scanner equipment in a high-mixed-products FAB.