基于ARM的移动视频监控系统设计

设计一种基于ARM的移动视频监控系统,介绍嵌入式系统下视频压缩、编解码库的移植与应用,视频流媒体的传输与控制。系统由视频采集端和移动监控端组成,视频采集端主要功能包括视频数据采集、压缩编码、传输及控制;移动监控端采用Android智能手机借助3G无线网络连接视频采集端,从而实现远程无线视频监控功能。实验结果表明,视频图像清晰、播放流畅、延时小且系统稳定可靠,达到了系统的设计要求。     

基于3G和WiFi的无线视频监控系统的设计

为了实现对远程环境的无线智能监控和提高用户控制体验,研究了3G和WLAN无线网络的特点,提出一种以ARM和linux为平台,融合3G和Wifi无线网络,设计一款无线视频监控系统。利用摄像头进行视频图像的采集,使用H.264进行图像的编码压缩和RTP协议进行图像传输,借助3G网络实现远程控制传输,同时利用Wifi实现局域网络接入的补充。实验结果表明可以实现pc、平板、手机同时多路连接监控,3G、Wifi网络可任意切换,达到预期效果。     

一种嵌入式移动视频监控系统的设计

介绍了一种基于嵌入式处理器的移动视频监控系统。系统硬件平台由CMOS图像传感器、G07007SB视频编码器、S3C4510B处理器组成，负责MPEG-4视频数据的采集和压缩编码；软件实现了MPEG-4数据的RTP封装和网络传输。     

可分级视频编码的输电线路状态监测设备研究

为降低监测系统视频图像的编码系统复杂度,提出一种视频/图像一体化状态监测技术,采用可分级编码方式压缩编码一次即可同时获得较低分辨率的视频流和高分辨率的图片信息,实际应用中可根据带宽情况或者用户需求从编码的可分级视频流中提取较低分辨率的监控视频码流或抽取相应的高分辨率、高质量的I帧图片进行传输。     

基于3G网络的无线视频监控终端设计

本终端是集视频或数据采集、视频压缩、3G无线视频传输等功能为一体的数字视频监控终端,终端采用TVP5150视频解码芯片,将摄像机采集的模拟视频信号转换成数字信号输入到DSP中。通过在DSP中植入的H.264算法来压缩终端接收到的视频流,这能够满足高精度实时视频监控的需求。本终端整合了3G网络和Inter-net网络的优势,无论客户身在何处、在何时间,都可以迅速接入系统,随时随地进行远程监控管理。本终端可以通过短信、命令台控制、终端服务器、定时以及报警触发方式启动,同时可以实时采集现场数据。     

一种新的流媒体网络质量分析系统

对基于WCDMA的流媒体关键问题进行分析和研究,针对流媒体业务中网络传输质量这一关键问题,给出了一种新的网络质量分析系统。该系统不仅能实时获取当前的网络情况,还能根据定量分析,实时地对编码端参数以及信道参数进行调整,使传输情况的变化不会严重影响流媒体业务感受。通过试验可以看出,该系统能很好地避免媒体流的丢包,能进行码率、分包大小的控制,使得流媒体传输更加顺畅。     

宽带网流媒体技术与应用

本介绍了流媒体基本概念，系统研究了流媒体压缩编码、基于端系统的流媒体传输QoS控制、内容分发网络、媒体同步控制和数字版权管理等流媒体关键技术。总结了常用流媒体软件平台的特点和硬件平台的技术要求。并分析了宽带网流媒体系统的组成和其作为宽带业务基础平台的应用模式。     

3G网络中的视频通信优化设计

3G网络CDMA2000信道带宽低、抖动大。为了在3G网络中进行实时视频通信,提出一种基于H.264硬件编解码的系统优化设计。该设计包括图像预处理器、H.264硬件编解码器Codec、ARM9主控CPU、网络传输模块。图像经预处理器AD转换,并进行抽样,压缩为CIF分辨率,CPU对H.264编码进行综合优化设置,调整QP参数和GOP结构,由硬件编码器Codec压缩,压缩后的数据由CPU封装打包进行网络RTP传输。解码时从网络接收数据,排序恢复数据后直接交由硬件解码器进行解码显示。实验表明,优化后的系统可以有效降低图像数据码率,减少传输带宽需求,达到3G网络实时通信的设计目的。     

5G上行带宽探测与应用研究

提出了一种5G上行带宽探测与应用的方案,能够有效解决视频监控数据在5G网络传输过程中遇到的网络波动问题,助力5G视频监控应用的实际落地部署。该方案在终端侧获取5G基站的无线资源调度信息,通过统计传输资源,估算出上行带宽变化趋势,结合流媒体应用的智能编码技术和码流自适应技术,在损失一定视频清晰度的代价下,保证视频不卡顿、画面连续,保障客户的整体感知。该方案可以广泛应用在校园视频监控等5G公共业务多、网络波动大、覆盖范围广的场景。     

基于H.264的视频数据传输及解码技术研究与设计

移动视频监控系统需要传输大量的实时视频数据,由于网络结构复杂、带宽有限等硬件条件限制,监控系统必须综合应用流媒体技术和视频编解码技术,才能满足在复杂条件下实时监控等功能要求。文章详细研究分析了流媒体技术和视频解压缩技术,提出了一种可行的项目实施方案,本方案将采用压缩率较高的H.264技术对视频数据进行编码,然后封装到RTP/RTCP数据包中,利用UDP协议进行传输。     

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.     

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     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first