全台网环境下的云视频素材转码系统的设计

在研究和分析广电系统对于视频素材转码实际需要的基础上,结合目前分布式计算和云计算技术的发展状况,提出了一种适合于目前广电系统视频素材共享的转码解决方案.系统在全台网的环境下,采用MapReduce的编程框架,以FFmpeg实现视频素材编码格式的转换,根据实际用户提出的转码请求,以视频分段策略实现视频在各个分布式客户端的格式转换,并采用视频格式自适应机制实现视频格式在各个不同的系统中转换和应用,在全台网环境内构建一个高效的、自适应的视频素材格式转换平台,使视频素材在电视台各个部门之间实现有效的共享.     

浅谈FFmbc及其在广电行业中的应用

在电视节目制作中,经常需要将各种各样的流媒体文件转换为广电行业使用的格式,使用非编软件进行转码是常用的一种方法,而本文介绍另一种更便捷实用的方法,即通过转码软件FFmbc,将流媒体文件转码为广播级视频服务器支持的视音频格式.经测试,转码产生的mxf格式文件,在Mediadeck视频服务器上成功播出.     

基于分布式视频转码技术的视频云平台

伴随着科学技术的发展,网络视频应运而生,并且逐渐成为人们了解信息、获得娱乐的重要手段,是网络媒体中的重要组成部分。分布式视频转码技术是指对视频的格式进行转换的一种技术,基于分布式视频转码技术的视频云平台是将分布式视频转码技术作为核心技术而生成的一种更加完善的视频转码技术平台,将分布式计算、效用计算、虚拟化、存储和推送等功能集于一身,是多种技术的综合体,使视频转码技术变得更加简便、高效。以下,本文将对基于分布式视频转码技术的视频云平台进行简要的探讨。     

达芬奇处理器实现实时高清视频转码

目前,市场上存在着H．264、WMV9、MPEG-2、MPEG-4、JPEG、MJPEG等众多的媒体格式,用户使用的播放设备也是多种多样,如数字相框、高清电视、手机、笔记本电脑、便携式媒体播放器（PMP）等。为能够在各种设备上以不同视频格式、不同分辨率随时随地存取视频内容,要求应用产品能够管理不同压缩格式间的本地转码以支持高清视频。     

索贝中标SMG超高清融合媒体交换平台

近日,索贝成功中标SMG超高清融合媒体交换平台。该平台将利用索贝分布式视频处理框架,兼容不同格式媒体文件,实现对现有文件分布式转码以及不同格式、分辨率参数的转换,结合索贝和华为联合开发的智能分布式对象存储系统,实现超高清素材的高速转码、闪拼及分发迁移。4K媒体内容交换平台将提供分片转码功能,支持HDR/SDR互转、支持超分辨率转码应用,拥有良好的可扩展性。同时4K媒体内容交换平台转码设备将能够全面支持主流专业视音频格式。     

数字视频格式的转换及转码

数字视频格式DV和MPEG-2的出现，使得原先典型的M-JPEG不再成为电视节目非线性编辑应用的主流。数字视频格式的多样化，使得电视节目在制作和播出中，不可避免地会出现视频格式之间的转换或转码情况。如何在转换或转码过程中保证图像的质量，则是本所探讨的课题。     

三网融合下基于云计算的实时转码技术的研究和应用

本文将探讨三网融合下视频内容的实时转码技术,通过该技术实现视频内容的在线实时转换和匹配,使得转换后的视频内容能够在各类终端上进行播放,同时基于云计算技术,搭建实时转码服务平台,为各类终端用户提供易用、开放、快速高效的融合视频服务。     

三网融合下基于云计算的实时转码技术研究和应用

本文将探讨三网融合下视频内容的实时转码技术,通过该技术实现视频内容的在线实时转换和匹配,使得转换后的视频内容能够在各类终端上进行播放,同时,基于云计算技术搭建实时转码服务平台,为各类终端用户提供易用、开放、快速、高效的融合视频服务。     

德州仪器将达芬奇技术引入实时高清视频转码芯片

人们对在各种设备上以不同视频格式随时随地存取视频的需求不断提升,因此,应用产品必须能够管理不同压缩格式间的本地转码,以支持高清视频,满足大量数据在不同介质上的存储要求,并通过不同格式支持与其它播放设备共享。要实现上述针对高清技术的操作要求,就需要更进一步地提高系统性能,扩大存储容量。此外,多格式转码技术在编解码算法上也需提升,以确保图像品质。     

云平台上AVS视频转码系统的设计与实现

随着网络与宽带技术的飞速发展,数字视频呈现出海量化与多样化的特征.AVS作为我国自主音视频标准,编码效率优于同期国际标准,在保证图像质量的同时,便于视频数据的存储与传输.为了将数字视频进行高效的AVS转码,提出并实现了一种云平台上的AVS转码系统,该系统采用音视频分离方法将其他格式视频文件快速转码成AVS格式,并避免了转码文件中音视频内容间不同步问题,实验结果证明了方案的有效性.     

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