发达国家广电产业应对IP电视的策略

在“发达国家公用电信产业开展IP电视近况”一文(本刊2005年第2期4～9页)中，陈述及分析了发达国家公用电信产业开展IP(因特网协议)电视的缘由、试验和运营概况及其面l临的问题和困难。本篇中陈述美国和西欧国家广电产业应对IP电视带来的竞争压力和发展机遇所采取的不同策略，下一篇“关于我国广电产业应对IP电视的设想”中，将依据国情并参考外国经验，陈述己见。     

网络公司如何开展电话点播业务

介绍有线电视网络公司开展电话点播业务的方式、方法     

网络公司如何开展电话点播业务

介绍有线电视网络公司开展电话点播业务的方式、方法。     

紧急广播概况及我国开展紧急广播业务的相关建议

紧急广播是一种利用广播通信系统向公众通告紧急事件的业务,自从美国"911"事件后,各国逐渐重视这项广播业务.本文介绍了美国、欧洲和日韩的紧急广播概况,以及我国针对突发事件应对机制颁布的法令.根据国外现有紧急广播系统的特点和我国相关法令对紧急广播的要求,对我国将来开展紧急广播业务提出相关建议,供决策者参考.     

Planning Communications Systems in Developing Countries

Technology for planning communications systems has generally been designed for applications in well-developed communication networks. There exists a question on the appropriateness of these techniques and equipment to developing countries with a high growth rate. This paper discusses five aspects of telecommunication planning for the high growth era in developing countries: forecasting, concept of service, planning technology, appropriate equipment, and technological flexibility.     

中国移动电视市场逐步走向繁荣

随着中国三大电信运营商相继开通了3G服务，高带宽的特征为视频传输提供了新的可靠平台，而移动电视产业的发展再次成为业界的焦点。     

移动多媒体广播(CMMB)发展规划

2006年广电总局提出自主研发的移动多媒体广播技术体制(CMMB),现已在全国范围内开展技术试验;日前广电总局正式向北京奥组委赠送了1000台移动多媒体广播CMMB接收终端,标志着CMMB开始为北京奥运会提供服务.本文将简要介绍CMMB系统架构和技术体系,并着重描述CMMB全国传输与覆盖网络的整体架构.     

对发展我国广播电视覆盖的思考

今年是“十五”计划的最后一年，也是制定“十一五”规划的关键一年，全国上下、各行各业正在紧锣密鼓地开展规划调研和规划编制工作。作为全国广播影视行业的主管部门，广电总局也正在着手进行全国广播影视事业和科技发展“十一五”和2020年远景规划的研究和编制工作。为配合该项工作，本刊特设立“十一五”规划专家探讨专栏，约请相关专家从不同视角探讨未来5～15年我国广播影视科技和事业的发展思路，希望能为相关部门制定规划提供参考。文章内容仅代表个人观点，特此声明。     

Some Implications of Telecommunication Policies in Developing Countries

In developing countries telecommunication policies are based on the urban development program. It is pointed out that the telecommunication needs of the developing countries lie in both the urban and rural areas and as a result two distinct networks, urban and rural, are needed. Establishment of a National Rural Telecommunication Agency is suggested to implement the concept of rural networks.     

Some Recurrent Problems of Telecommunications in Developing Countries

The expansion and improvement of telecommunication services in developing countries is faced with a number of problems of implementation and of method. The problems of implementation have well-established solutions and, therefore, are only briefly discussed in this paper. The main focus of this paper is concentrated on four classes of problems related to method, namely: 1) demand forecasting and its impact on system performance; 2) economic evaluation with special regard to social factors; 3) pricing; and 4) technological dependence on foreign countries. The problems need considerably more research and field work before results of any permanence and general validity are obtained. The paper concludes that dealing with these and related problems of method needs an essentially interdisciplinary approach. It further suggests that only some international technical and development organizations may, in the foreseeable future, be in the position to undertake interdisciplinary sectoral telecommunication studies of adequate breadth and depth to yield meaningful tools for better utilization of the scarce telecommunication resources in developing countries.     

发展中国家公众对科学研究的理解

在发达国家关于“科学素养”的讨论中,大众科学知识的核心通常是指科学家定义的物理学、化学、生物学等。2002年12月在南非开普敦举行的研讨会上,研究人员和实践者认为,发展中国家的公众对研究的理解更多地与一些基本问题相关为公众提供清洁的饮用水、让公众了解未采取安全措施的性生活与艾滋病毒感染之间的必然联系等等。发展中国家促进公众对研究的理解的各种项目必须面向弱势群体,必须努力消除社会阶层与地域间的不平等。科学技术资源的分配在政策上不应无视差别地一概而论。     

Code Restrictedness and Opportunities for Change in Developing Countries

It is plausible that certain observed similarities between individual orientations of peasants in developing countries and of the poor in developed nations may be traceable in part to their restricted utilization of language in organizing experience and communicating with others. Granting that there must be real opportunities in the environment (and assuming that there virtually always are), deficient encoding and decoding abilities may lessen the chances for both peasants and ghetto dwellers to respond effectively to such opportunities as a changing environment presents. Bernstein's hypothesis of code restrictedness may underlie problems of transforming traditional individuals by affecting the level of empathy which they exhibit when exposed to information about opportunities. Full utilization of language's potentials may be requisite to the perceptual flexibility and cognitive skill with hypotheticals; these in turn may be requisite to effective voluntary change. These considerations tie into more basic theories about the workings of the human mind. They hold promise of facilitating eventual unification of research on important aspects of communication in developing nations with important aspects of communication in the underdeveloped sectors of developed nations. Further, they promise synthesis with more general theories of communication and cognition.     

多媒体流技术为广播电视提供了广阔的发展空间

随着广播电视和因特网的结合,视音频信息的频繁交换,多媒体广播已成必然,并逐渐成为人们信息交流的主要载体。同时,希望通过因特网收听广播、收看电视已成为一种潮流。在互联网中,可以通过媒体播放器,接收到连续不断的数据包,而不必全下载后观看收听直播、点播节目。支持多媒体广播连续接收,不经     

以业务带动网络和广播的快速发展

1 我国广播电视事业发展取得巨大成绩 改革开放特别是1989年十三届四中全会以来,我国的经济建设取得了重大的历史性成就。     

Choice of Technology for Rural Telecommunication in Developing Countries

This paper draws attention to the outstanding feature of present telecommunications in developing countries, namely that most of the equipment is installed in towns but most people live in rural areas. Various features of the social environment are outlined, indicating their importance for planning and choice of technology. Social change is shown to offer the opportunity for telecommunication development but it also poses the main challenge to planning. The paper outlines the main constraints to choice of technology, emphasizing those that relate to the socioeconomic environment in the rural areas. Within these constraints, a pragmatic approach is advocated which admits both old and modern technological solutions. A discussion of the technology-transfer question develops a conceptual framework within which this approach may be justified.     

数字音频广播接收终端研发和生产的测试设备及方法

概述了数字音频广播发射系统的基本结构及相关设备,并在此基础上介绍了DAB接收终端研发和生产的测试方法,详述了接收终端的测试设备及测试系统组成,包括节目源合成器、COFDM编码调制器、上变频器和功率放大等.该方法现已成功地应用到本实验室研发及相关工厂生产DAB接收终端的测试当中.     

多山省区发展广播电视覆盖网的经验和建议

总结作者建国以来在高原省份云南从事广播、电视媒体科技40多年,在该地区发展广电覆盖网技术的经验教训,概述在山区省发展广电覆盖网应关注的问题.重点是建立山区的"地面卫星"站和无线广电覆盖网.     

亚太地区主要国家RFID应用的发展特点

目前在亚太地区,特别重视RFID应用的国家和地区有美国、日本、中国、新加坡、中国台湾和中国香港等。本文在研究、分析美国、日本和中国在应用RFID的不同特点的基础上,得出中国在RFID的应用上应该侧重于哪些方面的结论。