基于S3C6410的实时视频监控系统

介绍了基于ARM微处理器S3C6410的嵌入式视频服务器硬件、软件设计方案.该方案以嵌入式Linux作为操作系统,采用S3C6410自带的编码器MFC对采集到的数字视频进行H.264标准的压缩编码,生成H.264码流.码流经过S3C6410控制器外接的网络芯片DM9000输送到PC机.PC机使用DirectShow技术解码H.264码流,并实现实时视频播放.     

基于嵌入式linux的实时视频通信的实现

以海思HI3716C为硬件平台,提出了一种在此平台之上实现实时视频通信的方法.该平台以嵌入式Linux为操作系统,采用yaffs2文件系统.视频数据采集设备使用USB摄像头,从USB摄像头捕获视频数据的功能通过V4L2编程接口来实现.HI3716C平台支持H.264,H.263和MPEG-4编码格式,利用SDK中提供的视频编码API对捕获到的视频数据进行压缩编码.因实时视频传输对实时性要求高而对数据完整性要求低的特点,采用UDP协议作为传输协议.     

基于达芬奇平台的网络视频监控系统设计

以TI公司的DM6446为核心,在达芬奇平台上实现了视频采集、H.264编码、Web Server网络传输。在视频处理子系统上,使用嵌入式Linux的V4L2应用编程接口实现视频采集,为DSP内核后续的图像处理奠定了基础。摄像头采集的模拟视频信号经TVP5146解码后转换成数字信号被送到DM6446中进行H264压缩编码,并以RTP/RTCP协议传输给客户监控端;电脑客户监控端程序用摄像头可实现现场实时监控和远程控制。     

基于i.MX27的无线视频监控系统的设计与实现

介绍了一种以i.MX27为硬件平台的处理器,嵌入式Linux为操作系统的无线视频监控系统的实现方案.给出了系统的总体结构与软硬件模块,重点阐述了视频采集及编码的过程;针对i.MX27硬件编码单元输出的H.264视频流,设计并实现了在RTP协议下视频流的实时传输.客户端通过接收、解码及显示监控前端传送的H.264视频流,实时显示监控场景.经实验测试,该系统达到了较好的实时性和可靠性.     

基于S3C6410的无线视频监控系统设计与实现

选用S3C6410处理器为硬件平台,嵌入式Linux操作系统为软件平台,对采集到的实时图像进行H264视频编码,通过3G中的分支-wi—fi传输,设计并实现了一个无线视频传输系统。     

小型化高清视频压缩传输系统设计

针对炮射/弹载微小型飞行器有效空间对任务载荷的要求,设计了一种以DM368为核心处理器的低功耗高清视频压缩传输系统。依赖DM368内嵌的视频协处理器,对开源高清视频编码器X264进行移植优化,使得系统具有功耗低、处理延迟小等优势,编码延时缩短了66%,为实时传输战场图像提供了一种有效解决途径。     

OMAP3530在网络视频服务器设计中的应用

为了解决网络视频通信中对视频图像清晰度要求高以及减少视频过多占用网络资源的问题,构建高效、实时、可靠的数字视频监控系统,设计了一种基于OMAP3530双核视频处理芯片、H.264编码技术、嵌入式Linux操作系统、RTP/UDP网络传输协议的数字视频服务器,详细介绍了视频服务器的硬件结构、软件设计以及视频数据网络传输与处理等主要技术。实验结果表明,该服务器的关键技术指标满足应用要求,能够满足监控系统视频图像的实时性要求。     

基于TMS320DM365的高速网络摄像机的设计

针对传统网络摄像机的结构复杂、效率低下以及昂贵的成本等问题,提出了基于嵌入式Linux和达芬奇技术TMS320DM365处理器平台的高速网络摄像机系统的设计方案。通过对基于TMS320DM365的高速网络摄像机进行硬件软件设计,从前端摄像头采集视频数据,通过Linux操作系统的V4L2编写驱动程序从而实现视频的采集。经H.264压缩算法对视频数据进行处理,最后通过RTP以及RTCP编码后经由100 M网口完成网络传输。     

基于DM8168和CPCI接口的音视频处理板卡设计

为了实现对音视频信号的采集、编码、解码、存储与传输,同时也为了满足整机系统的模块化设计要求,设计并实现了一种CPCI接口的3U音视频处理板卡。硬件方面,它以TI公司的达芬奇系列芯片DM8168为核心处理器,通过一个3U规格的CPCI板卡,将SDI高清视频、CVBS标清视频、音频信号的采集处理和千兆以太网、USB接口、SATA接口等功能集成到一起。软件方面,则通过运行于DM8168之上的嵌入式Linux操作系统,实现音视频的采集、H.264、G.711压缩解压缩算法、TCP/IP传输协议等功能。经过使用测试,本音视频处理板卡满足了两路视频数据采集、H.264编码、存储和千兆网传输等要求,也达到了整机系统的模块化设计要求。     

基于TMS320DM355的网络高清视频监控系统的设计与实现

介绍了一种基于嵌入式Linux和TMS320DM355处理器平台的视频网络监控系统的设计与实现.该系统可根据需要,选择采集来自于VGA接口或者摄像头的视频数据,利用嵌入式Linux操作系统的V4L2(视频设备的内核驱动),编写驱动程序,进而实现视频的采集.经MPEG-4压缩算法对采集到的视频流进行压缩编码后,通过实时传输协议(RTP)和实时传输控制协议(RTCP)实现编码的视频数据流在网络的传输.     

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.     

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.     

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.     

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.     

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     

JOURNAL OF ELECTRONICS(CHINA)

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NOTICE OF CHANGING JOURNAL OF ELECTRONICS （CHINA） TO MICROSYSTEMS ＆ NANOENGINEERING

正Journal of Electronics(China)(JE)was founded in 1984,sponsored by the Institute of Electronics,Chinese Academy of Sciences.JE is one of the first English academic journals in China in the field of Electronics and Information technology.The journal was published quarterly since it was launched in 1984 to 2003,then it is published bimonthly till now.During