中央电视台新闻中心150平米演播室改造之视频系统设计与实现

本文介绍了新闻中心150平米演播室系统改造的背景,概述了系统改造、演播室景区和导控室的大概情况及其特点,详细介绍了视频系统的构思与设计,设备选型与特点以及视频系统集成具体步骤等,对电视台新闻直播演播室视频系统高清改造有一定的参考价值。     

教育虚拟演播室技术

虚拟演播室是在高速图形计算机和视频色键基础上发展起来的演播室技术.在虚拟演播室系统中,现场视频可以实时地与计算机产生的三维图形完美无缺地集成在一起,是对传统的教育电视演播室技术的一次重大变革.本文讨论了虚拟演播室系统的原理、技术途径以及系统评价等问题.     

从实际应用的角度合理改造新闻演播室系统

介绍了甘肃广电总台新闻演播室改造的设计思路,视频、音频、播出、通话、时钟等系统设备的配置和技术要求,总结了改造后系统的技术特点。     

电视台演播室“群”概念视频系统设计

为适应河南“中部崛起”快速发展,提高宣传保障能力和适应广电技术自身高速发展的需要,河南电视台对众多演播室以“群”概念的视频系统进行了重新设计和改造,提高了节目制作中设备资源和信号资源的利用率.本文对此次演播室视频系统“群”改造进行介绍.     

IP演播室主要IP技术的应用

本文以中央广播电视总台复兴路办公区第十七演播室IP化系统改造为例,对演播室改造中IP技术层面的设计及应用进行了分析阐述.     

苏州广播电视总台全景交互演播室改造

介绍了苏州广播电视总台融合各方设备,自主集成,自主调试,将使用10年的传统演播室升级改造为全景交互演播室的案例。整个改造包括舞美、灯光、图文包装系统、视频系统、摄像机承托系统、交警第二演播室。为新大楼全景交互演播室的搭建提供理论依据和实践经验。为有相同计划的友台也提供了难能可贵的经验。     

苏州广播电视总台全景交互演播室改造

本文介绍了苏州广播电视总台融合各方设备,自主集成,自主调试,将使用10年的传统演播室升级改造为全景交互演播室的案例。整个改造包括舞美、灯光、图文包装系统、视频系统、摄像机承托系统、交警第二演播室。为新大楼全景交互演播室的搭建提供理论依据和实践经验。为有相同计划的友台也提供了难能可贵的经验。     

融媒体演播室视频系统应用实践

本文以在江西广播电视台150平方米融媒体演播室制作的《心动的盲盒》节目为例,从融媒体视频系统概述、节目需求与解决方案、周边系统设置等方面介绍了该融媒体演播室视频系统技术方案的设计思路与调试过程。     

多个小型演播室部分视频设备共用的应用实践

2007年,我们对台里的120m^2演播室和虚拟演播室进行了数字化改造。因为这两个演播室原来就共用一个面积不大的导控室,所以,在制订改造方案时,我们决定让这两个演播室共用视频系统中的部分设备,把两个演播室的导控系统设计成一个既相互独立,又相对统一,既互相备份、又互相级联的共用视频系统。这样做不但可以节省空间面积,而且还能对两个演播室的各类信号集中控制,既能增加节目制作的灵活性,又能降低设备采购成本,提高设备的使用效率。     

小型演播室的直播改造

介绍了西安教育电视台演播室直播系统中视频、音频、同步、通话等方面的改造情况,通过分析原系统的不足,在充分考虑系统的安全可靠性、科学先进性、开放性、可扩充性的角度给出最优的改造方案.经过技术改造,把演播室建设成灵活、先进、安全、有效的直播系统.     

Progress in electrophotography in Western Europe

A review is given of the progress in electrophotographic science and technology in Western Europe during the years 1967 to early 1971. University research work is mainly directed towards two areas: 1) the electrical and physical properties of photoconductors, such as selenium, chalcogenides, oxides, and organic materials; and 2) the sensitization of these photoconductors. Industrial research teams report on the preparation of electrophotographic layers on development and on image evaluation. A bibliography including scientific papers and patents published on this subject during said period completes this review.     

智能通信在楼宇自控系统中的应用

随着计算机技术、控制技术、通信技术及信息技术的飞速发展,人们对生活、办公环境安全性、舒适性的要求日渐增长,智能建筑应运而生。楼宇自动化控制系统是智能建筑的一个重要组成部分。通过结合具体的智能楼宇控制工程项目,在介绍系统概况的基础上,给出了系统的总体设计方案及子系统的监控方案,具有一定的实用价值。     

Advances in millimeter-wave subsystems in Japan

The authors describe the development trends and results of millimeter-wave systems in Japan in such fields as communication, radar, and measurement systems. The applications included are the W-40G waveguide transmission communication system, an automobile traffic control system using the 60-GHz band, a collision avoidance radar system for an automobile, a plasma electron density measuring system, and satellite communication. The authors describe the development of devices such as high-power FET amplifiers, traveling wave tube amplifiers (TWTAs), IMPATT amplifiers, low-noise amplifiers, and monolithic microwave integrated circuit (MMIC) devices used in constructing the millimeter-wave systems     

中国带电清洗技术的突破

一、电路故障的成因 通常,由于空气的污染和设备所处的环境及管理条件不同,空气中的灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种机械杂质等污染物质,不可避免地吸附在电路表面及其它部位,加之静电累积和在电场力的作用下,污秽的累积不断加重和变得牢固,各种污秽牢牢附着在线路表面,深层及各部位。灰尘、油污、酸碱及其气体、盐分、潮气、炭渍、金属尘埃、各种     

Telecommunications in Malaysia: diversity in adversity

The telecommunications industry in Malaysia has experienced a tremendous transformation in just over a decade. The government-owned Jabatan Talikom, which hitherto operated the network, was incorporated in 1987 and subsequently privatized a few years later, with a majority share holding by the government. The regulatory aspects were spun off under the slim looking JTM. This marked the beginning of liberalization, and many new players entered the fray. This article reviews the telecommunications infrastructure and services available in Malaysia and visits some of the telcos offering these services. Some pertinent issues affecting the industry are also discussed     

Losses in small-radius bends in single-mode fibres

Refractive index profiles and mode field radii determine small-radius bending losses in single-mode fibres. Losses in six different types of fibres were measured in bends with radii ranging from 1.25 to 8 mm. The results show that a refractive index depression in the core centre reduces the bending-loss sensitivity.<>     

Rearrangements in cell populations in malignant growth

It is emphasized that one of signs of malignant growth is heterogeneity of cell population which arises at the earliest pretumour stages and determines the character of tumour progression. At the same time by means of selective influences on population of malignant cells it is possible to change their quantitative correlation and to obtain rearrangement of the normal cell interrelations. Initiation of the tumour, its progression and regression are considered on the basis of the population-cell rearrangement, typical of each of them separately. The concept of the unity of the carcinogenesis and anticarcinogenesis processes is also formulated.     

General Trend in Electrical Communications in Japan

Systems are currently being designed for higher reliability and greater economy. Larger transmission capacity is required to meet a rapid increase in recent communication demands instigated by the introduction of video and information communications facilities. More flexibility, to deal with the variety of communication modes to come, and smaller hardware dimensions, to overcome situations caused by the high population density, seem to be particularly sought in the communication technology of Japan. Research and development concentrate on these objectives. The following is an explanation of the present state of the art and general trends in this country.     

Progress in display-device development in Western Europe

A review of the basic research and industrial development of display devices in Western Europe during the years 1968 to early 1973 will be given. The display types considered are: 1) active displays such as cathode ray tubes, light-emitting diodes, electroluminescence cells, and gas discharge devices, and 2) passive displays such as laser displays, light valves, and ferroelectric and liquid-crystal devices.