基于FPGA的光纤与1.4标准HDMI接口转换方法

为实现高清视频的远距离传输,设计了一种基于FPGA实现高清视频在光纤和HDMI接口之间转换的方案.利用光纤通道接口控制芯片、HDMI收发处理芯片、FPGA等核心器件,通过FPGA编程对高清视频数据进行串行化处理,实现高清信号在光纤信道中的传输.方案可以有效延长高清信号传输距离并提高视频分辨率,广泛用于室外大型高清显示设备.     

基于ARINC818协议的高清视频传输系统设计

航空电子数字视频总线(ARINC818)是针对航空领域高清视频信号远距离传输提出的一种视频接口协议,它具有高带宽、低延迟、小衰减等特点.研究对ARINC818协议进行了解析,设计了一套光纤传输收发系统,采用FPGA进行视频的编解码,最高可实现6.25 Gbps速率下1 920×1 080@60Hz的高清视频传输.经过高...     

基于SMPTE 274M标准的高清视频发生器设计与实现

设计一种基于SMPTE 274M标准的高清视频信号发生器,充分利用FPGA设计的灵活性,通过对SMPTE 274M标准中的EAV、SAV、消隐数据、行场信号等进行控制,实现了1080P 60 fps高清视频信号发生器。仿真结果和实验表明该视频信号发生器设计正确有效,并已在某视频处理系统中得到广泛应用。     

基于FPGA的HD-SDI转HDMI接口设计与实现

基于安防、监控行业的需求,提出了一种基于FPGA的HD-SDI转HDMI接口的设计,并详细介绍了实现过程。FPGA对多路HD-SDI高清视频信号进行接收后,在2片DDR4中完成多路视频数据的乒乓缓存,最后选通其中1路输入视频转换为HDMI接口输出。经验证,结果满足设计要求,且该方案具有成本低、灵活性高的优点。     

基于ARM11+FPGA的多路视频监控系统关键技术研究

针对当前多路视频采集远程传输系统存在的问题,提出一种基于ARM 11和FPGA的解决方案,分析了系统的组成结构和关键技术.应用FPGA首先实现了对多路视频信号的同步采集,其次解决了对视频缓存操作过程中的存储、读写冲突及时钟同步问题,最后生成BT.656格式视频流进行后续处理.利用高性能ARM11处理器内部MFC模块,完成了对视频信号的H.264编码.系统采集到的多路视频信号通过网络发送,监控端实时接收数据,进行解码后显示,具有广阔的应用前景.     

机载窄带多路视频传输系统设计

为了满足两路视频的实时窄带无线传输要求,设计并实现了一种JlEG2000视频压缩解压缩与多路数据传输系统.系统总线带宽为3.84Mbit/s,视频信号采集、压缩、下传、回放的延时控制在300ms以内.本系统由APV202来完成视频压缩与解压缩,由FPGA来实现两路视频数据和一路遥感数据的封装及传输.用ATmega128...     

基于双线性内插算法的多路视频的缩放设计

基于双线性内插算法,设计改进了一种以FPGA为硬件平台的多路视频信号的图像缩放装置.把与期望位置相邻的两行像素缓存在RAM中,先对垂直方向进行插值运算,再对水平方向进行插值运算.利用FPGA并行处理的优势实现多路视频信号的实时缩放.     

基于FPGA的宽带拆分逻辑——通道监控技术研究与应用

介绍了一种采用FPGA来实现8路OTU1-L或8路[OTU2v-L]/4到2路OTU2v-L的处理。用1块FPGA完成8路OTU1-L或8路[OTU2v-L]/4到2路OTU2v-L拆分的映射/解映射,并实现主备无损倒换,每片FPGA处理2路10G业务。具体讲解了信号在通道传输中怎样被检测的设计思路和实现方法。     

多路视频双向光纤传输系统的研究

为了满足多路视频信号安全可靠的传输,研究了一种多路视频双向光纤传输系统.该系统能够实现16路视频信号的双向传输,满足某些特定场合的应用需求.阐述了该系统的基本原理,并给出了其框架结构,同时对关键模块进行了相关设计.     

高清视频信号长途IP链路系统部署设计

介绍了高清视频信号的IP传输系统的架构、安全性设计以及路由信息配置方面的一些关键技术,并着重研究了DCM对TS流进行FEC矩阵排列打包的技术问题,提出了具有广电特色高清视频信号的IP传输系统设计思路.     

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.     

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.     

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.     

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.     

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.