广播电台数字音频资料系统的构建与应用

阐述了数字音频资料系统的产生和体系结构;讨论了数字音频资料的存储、采集、编目、编审和管理控制等;提出了系统实际应用中的功能需求等有关问题。     

电视节目中数字音频素材的处理与应用

数字音频是一种利用数字化手段对声音进行录制、存放、编辑、压缩或播放的技术，它是随着数字信号处理技术、计算机技术、多媒体技术的发展而形成的一种全新的声音处理手段。数字音频与一般磁带、广播、电视中的模拟音频相比，具有存储方便、存储成本低、存储和传输过程中声音不失真、编辑和处理非常方便等特点。基于此，探讨电视节目制作中数字音频技术的应用，并对音频素材的处理进行分析，以促进电视节目数字音频素材处理与应用水平的快速提升。     

广播电视工程中的数字音频及嵌入技术

随着广播电视工程技术的不断发展,数字音频及其嵌入技术在提高音视频质量、处理效率和存储共享方面展现出显著的优势。介绍数字音频及其嵌入技术的应用原理,阐述数字音频技术在广播电视工程中的应用优势,分析数字音频的嵌入与解嵌要点、数字音频及其嵌入技术在广播电视工程中的具体应用要点。     

数字音频技术在广播工程中的应用

阐述数字音频技术的特点,广播工程中的数字音频技术应用,数字音频技术使用了大量复杂的应用软件,极大程度提升音频质量,保障节目剪辑的精准性,提高音频信息存储与管理效率。     

存储区域网技术及其在数字视音频网络中的应用

本文从存储区域网的概念、结构、功能及应用等几个方面，详细地阐述了存储区域网技术及其在数字音频网络中的应用。     

电视与广播

TN931.22007021619电视播出系统中视频服务器的选购/邱海生,张玉娟(临沂市广播电视局)//电视技术.―2006,(4).―72～74.阐述了视频服务器的构成及其在电视播出系统中的功能,介绍了国内外市场几款主流视频服务器,分析比较了国内外产品的主要差异,提出了选购视频服务器需要综合考虑的5个因素。图0表0参3TN9342007021620广播电台数字音频资料系统的构建与应用/陈志刚(安徽人民广播电台)//电声技术.―2006,(3).―67～70.—139—阐述了数字音频资料系统的产生和体系结构;讨论了数字音频资料的存储、采集、编目、编审和管理控制等;提出了系统实…     

刍议广播电视工程中数字音频技术的应用

本文对数字音频技术的原理作了简要的概述,分析了在广播电视工程之中数字音频的应用优势,主要有拓展音频轨道、进行准确剪辑、高效存储,重点介绍了该技术在嵌入环节、接口协议环节、编码技术环节以及云端技术环节中的具体应用.     

数字音频水印

感知音频编码是音频信号存储和传输的主流技术。数字音频水印技术和感知音频编码技术相结合，在音频信号中嵌入水印数据。在保证合成音频信号质量不发生可察觉变化的同时，充分保证水印数据的健壮性。文中首先介绍了数字水印系统的概况，然后讨论了数字音频水印系统的特点和要求，比较了常用的数字音频水印技术，接着重点讨论了基于扩频技术的数字音频水印系统的实现方案，最后归纳了数字音频水印的典型应用。     

浅谈数字音频工作站系统

近年来,随着数字音频技术的不断发展,一批以西门子、ＣｒｅａｍＷａｒｅ、联汇等为代表的数字音频工作站（ＤＡＷ：ＤｉｇｉｔａｌＡｕｄｉｏＷｏｒｋｓｔａｔｉｏｎ）正逐步应用到中央台的节目录制、编辑和播出系统中。数字音频工作站是一种基于计算机的强大数据处理能力,并以计算机控制的硬磁盘为主要记录载体,从而完成音频节目的录制、编辑、播放、管理等功能的数字音频系统。它的主要特点是：以图形菜单作为人机交互的界面;在节目录制时,能将数字音频信号像计算机中的普通文件一样进行处理,包括存储、编辑、复制、传送等。一个专…     

数字音频技术在广播电视工程领域中的应用

随着科技的快速发展,我国的音频技术也有了革命性的发展。模拟音频渐渐淡出了历史舞台,而数字音频则以其高音质、灵活性、存储方便的优点进入了广播电视工程领域。本文主要探讨的是数字音频技术在广播电视工程中的应用。     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Nanoimprint Lithography -A Next Generation High Volume Lithography Technique

IntroductionNanoimprint Lithography is a well-acknowl-edged low cost, high resolution, large area pattern-ing process. It includes the most promising methods,high-pressure hot embossing lithography (HEL) [2],UV-cured imprinting (UV-NIL) [3] and micro contactprinting (m-CP, MCP) [4]. Curing of the imprintedstructures is either done by subsequent UV-lightexposure in the case of UV-NIL or by cooling downbelow the glass transition temperature of the ther-moplastic material in case of HEL…     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

Influence of PVK ： NPB hole transporting layer on the characteristics of organic light-emitting devices

A doping system consisting of NPB and PVK is employed as a composite hole transporting layer （CHTL）. By adjusting the component ratio of the doping system, a series of devices with different concentration proportion of PVK ： NPB are constracted. The result shows that doping concentration of NPB enhances the competence of hole transporting ability, and modifies the recombination region of charge as well as affects the surface morphology of doped film. Optimum device with a maximum brightness of 7852 cd/m^2 and a power efficiency of 1.75 lm/W has been obtained by choosing a concentration proportion of PVK ： NPB at 1：3.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.     

Analysis of error performance on Turbo coded FDPIM

Due to variable symbol length of digital pulse interval modulation（DPIM）, it is difficult to analyze the error performances of Turbo coded DPIM. To solve this problem, a fixed-length digital pulse interval modulation（FDPIM） method is provided. The FDPIM modulation structure is introduced. The packet error rates of uncoded FDPIM are analyzed and compared with that of DPIM. Bit error rates of Turbo coded FDPIM are simulated based on three kinds of analytical models under weak turbulence channel. The results show that packet error rate of uncoded FDPIM is inferior to that of uncoded DPIM. However, FDPIM is easy to be implemented and easy to be combined, with Turbo code for soft-decision because of its fixed length. Besides, the introduction of Turbo code in this modulation can decrease the average power about 10 dBm, which means that it can improve the error performance of the system effectively.     

A method for calculating the center position of collimated light

It is a key problem to accurately calculate beam spots＇ center of measuring the warp by using a collimated laser. A new method, named double geometrical center method （DGCM）, is put forward for the first time. In this method, a plane wave perpendicularly irradiates an aperture stop, and a charge couple device （CCD） is employed to receive the diffraction-beam spots, then the geometrical centers of the fast and the second diffraction-beam spots are calculated respectively, and their mean value is regarded as the center of datum beam. In face of such adverse instances as laser intension distributing defectively, part of the image being saturated, this method can still work well. What＇s more, this method can detect whether an unacceptable error exits in the courses of image receiving, processing and calculating. The experimental results indicate the precision of this method is high.     

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.     

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.