DVB-C标准下的应急广播技术研究

本文从应急广播和其对终端的要求的概念出发,对有线数字电视网传输应急广播的优势、基本方案、相关规范的应用和对原相关规范的修改建议以及基于有线数字电视终端应急广播的实现机制进行了阐述,最后对“十二五”中后期有线数字电视应急广播的完善提出见解。     

一种有线数字电视机顶盒远程唤醒实现方法

基于数字电视尤其是有线数字电视进行应急广播的相关技术获得很大进展,其技术实现模式和系统也日益受到相关科研和应用部门的重视,但目前大多数电视机顶盒日常待机时调谐器和解调解码等模块都处于待机甚至断电状态,无法响应前端系统发出的远程唤醒信号,从而无法启动应急广播相关流程。为此,提出了一种低成本低功耗的有线数字电视机顶盒的远程二次唤醒实现方法,很好地解决了作为应急广播终端的电视机顶盒远程唤醒和启动的问题。     

一种低成本低功耗的有线数字电视机顶盒远程唤醒实现方法

【摘要】基于数字电视尤其是有线数字电视进行应急广播的相关技术获得很大进展,其技术实现模式和系统也日益受到相关科研和应用部门的重视,但目前大多数电视机顶盒日常待机时调谐器和解调解码等模块都处于待机甚至断电状态,无法响应前端系统发出的远程唤醒信号,从而无法启动应急广播相关流程,提出了一种低成本低功耗的有线数字电视机顶盒的远程二次唤醒实现方法,很好的解决了作为应急广播终端的电视机顶盒远程唤醒和启动的问题。     

对有线数字电视电子业务指南相关规范的建议

以广电总局<有线数字电视广播业务信息应用指南(暂行)>和<有线数字电视电子节目指南指导性意见(暂行)>规范为指南,结合 DVB相关标准和我国有线数字电视运营的实际情况,参照我国直播卫星、移动多媒体广播电子业务指南的相关规定和标准,提出了关于在有线数字电视电子业务指南中增加相关应用并标准化的设想.     

建设南平市有线数字电视平台的构想

本根据国内外有线数字电视的发展情况及国家、省有线数字电视发展有关政策，对有关有线数字电视的“整体平移”时间表、有线数字电视的标准及规范，以及相关的技术进行了介绍。同时，根据南平市广播电视发展水平，对南平市的市级有线数字电视平台的建设提出构想．对平台包括的南平市有线数字电视前端系统、网络系统、用户终端三大部分进行了具体介绍，并提出了对南平市的县级有线数字电视平台建设的设想。     

云南省县级应急广播体系建设模式研究

县级应急广播体系直接承担着面向人民群众宣传党和国家的方针政策、播发应急信息和提供公共文化服务的任务,是应急广播进入千家万户的重要基础,也是应急广播体系建设的重点和难点。本文以云南省江城县为例,对县级应急广播体系建设模式进行研究与实践,通过调频广播、地面数字电视广播、有线数字电视广播、大喇叭系统等多种方式,实现应急广播信号在全县的综合覆盖,为云南省应急广播体系建设奠定基础。     

康佳SDC9100系列功能介绍

产品名称：DVB—C有线数字电视终端接收机 型号：SDC9100系列 产品简介：SDC9100系列标准清晰度有线数字电视终端接收机符合国家标准。可接收DVB—C格式的标准清晰度数字电视广播和数字音频广播信号，支持EPG、NVOD、32bit电子游戏、信息浏览等应用功能，清晰的中英文OSD实现人机对话、操作简便。外观造型美观、大方，具有时代潮流感。     

基于地面数字电视覆盖网的农村应急广播系统设计与实现

本文结合应急广播终端控制与响应相关科研情况和部分地区应急广播农村大喇叭系统建设实践情况,探讨了一种基于地面数字电视的农村应急广播大喇叭系统的总体架构、系统组成与技术实现思路,并重点分析了该种技术实现方式在传输覆盖资源利用、应急广播播发管理、运行维护以及灾备设计等方面的优势。     

基于DVB-C有线数字电视平台的应急广播系统

介绍了基于DVB-C有线数字电视平台的应急广播系统,依托现有有线数字电视播控与传输平台,应急广播指令与音频信号复用到数字电视播控平台.利用有线电视共缆传输,终端设备的技术实现与数字电视机顶盒基本一致.以全新的理念全面实现了音频/文字信息数字化、播控自动化、管理智能化、扩展自由化,与现有HFC网络完全融合,是广电运营商建设应急广播系统的理想的解决方案.     

有线数字电视应急广播消息索引表的封装

有线数字电视前端应急广播消息接收处理系统将应急广播消息的消息标识符、开始时间、持续时间、类型、级别、覆盖区域和详情频道播放参数封装为应急广播索引表,并按规定的传输流格式将索引表和内容表复用到播出节目传输流中进行传输。     

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.     

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.     

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