数字高清演播室嵌入音频应用

电视制作已跨入数字高清时代,嵌入音频技术以其自身视音频复用的特点,在数字高清系统,特别是数字高清演播室中得到广泛应用.本文分为嵌入音频(高清格式)原理与数字高清演播室应用两大部分.原理部分的数据引自国外专业技术网站;应用部分探讨了使用嵌入音频解决大型直播外来信号输入、远程信号传送、演播室信号互传等方面的工作实例,并对使...     

新闻移动直播的技术平台

结合西安电视台新闻移动直播车的设计和系统构成,探讨了新闻直播车车体、视音频、通话、信号传输、供电系统等方面的技术应用。     

广播电台卫星车传输系统的调试及应用

本文介绍的大连电台卫星车可以传输一路带伴音的标清视频数字信号、一路数字音频信号．支持双向四路电话、互联网数据、流媒体视频信号、电视会议业务信号传输等业务：也可以独立完成中、小型活动的现场扩声和直播任务。另外配置的数字视音频无线传输系统则较好的解决了第二现场和现场采访的信号传输问题。     

陕西电视台硬盘播出系统监控解决方案

随着电视台数字硬盘播出系统技术的发展,系统的复杂程度也越来越高,为更好地提高系统的安全性,监控系统的建设尤其重要.介绍了陕西电视台硬盘播出系统监控采用的几种实现方式:视音频信号内容直播监视方式、播出信号技术指标监测系统、主要设备原厂配置的智能化技术管理监控报警系统、综合智能化技术管理监测报警系统.重点分析了综合智能化技术管理监控平台和关键模块.     

谈BTV新闻直播演播室的系统改造

由于北京电视台新闻直播演播室的许多设备老化,且原设计采取的应急处理方式在主要设备出现单点故障后不能实现视音频信号的无缝切换,影响到了直播的安全性。根据新闻直播的技术流程,按照安全第一、高效运行、技术先进、操作灵活的原则,我们对承担新闻直播任务的演播室进行了一系列的技术改造,采用了主备路播出信号互为备份及主要视音频设备双机热备份的技改方案;同时使用主备视频服务器代替传统录像机进行新闻节目素材上载和播放等一系列的技术改造,在最大程度地避免技术设备单点故障所带来的技术隐患。此技术构架经过实践证明,有一定的实效性和推广价值。     

厦门广电集团技术中心圆满完成厦门翔安海底隧道通车仪式直播

中国大陆第一条海底隧道——厦门翔安海底隧道于4月26日上午建成通车,技术中心圆满完成对通车仪式的直播。本次直播首次采用350兆数字微波实现隧道内移动视音频信号的全程覆盖。此次电视直播信号传送的难度大,既要保证长达6公里的翔安隧道内移动直播车信号的全程覆盖,又要保证翔安出口单机点的信号传输。技术中心高度重视,组织技术人员提     

淡BTV新闻直播演播室的系统改造

由于北京电视台新闻直播演播室的许多设备老化，且原设计采取的应急处理方式在主要设备出现单点故障后不能实现视音频信号的无缝切换，影响到了直播的安全性。根据新闻直播的技术流程，按照安全第一、高效运行，技术先进，操作灵活的原则，我们对承担新闻直播任务的演播室进行了一系列的技术改造，采用了主备路播出信号互为备份及主要视音频设备双机热备份的技改方案；同时使用主备视频服务器代替传统录像机进行新闻节目素材上载和播放等一系列的技术改造，在最大程度地避免技术设备单点故障所带来的技术隐患。此技术构架经过实践证明，有一定的实效性和推广价值。     

第四届环湖赛开幕式电视直播技术方案

本文介绍了第四届环青海湖国际公路自行车赛开幕式直播技术总体方案、转播车及摄像机机位架设、视音频信号调度以及通话系统的技术情况。     

流媒体信号转HD-SDI信号的设计方案与实现

本文介绍了如何在Linux操作系统上,采用Qt5开源框架,结合FFmpeg开源软件包,实现流媒体信号视音频数据包的解复用、排队、解码,并使用专业级的DeckLink卡实现解码后视音频的播放.播放后的HD-SDI信号可以直接接入演播室的视音频切换系统,可以实现流媒体信号与演播室信号的混合直播与制作,使得流媒体信号在广电节...     

电视中心制作系统管理中的视音频技术

介绍了南方电视台电视中心制作中心前期采集、后期编辑、演播室系统的视音频系统的基本情况，系统中存在的视音频信号，日常播出的信号流程和系统运行时遵循的各种技术要求及依据的有关标准，最后介绍了电视制作中心系统日常运行的设备管理和运行管理情况。     

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