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Teletext was a technology developed in Europe in the late 1970s and perfected in North America during the early 1980s by the Canadian Department of Communications and AT&T. Teletext was a digital database transmitted along with a regular television signal. It enabled broadcast, PBS, and cable statio
Digital Television closely examines all present-day TV transmission methods. These include MPEG, DVB, ATSC and ISDB-T. DVD is also discussed. The text covers these subjects in a practical-minded manner. Although mathematical formulations are used, they are in most cases only utilized to supplement the text. The book also contains chapters dealing with basic concepts such as digital modulation or transformations into the frequency domain. A major emphasis is placed on the measuring techniques used on these various digital TV signals. Practical examples and hints concerning measurement are provided. The book starts with analog TV base and signal, continues with MPEG-2 data stream, digital video, and digital audio, and then moves on to compression methods. After an excursion into the digital modulation methods, all the mentioned transmission methods are discussed in detail.
InfoWorld is targeted to Senior IT professionals. Content is segmented into Channels and Topic Centers. InfoWorld also celebrates people, companies, and projects.
InfoWorld is targeted to Senior IT professionals. Content is segmented into Channels and Topic Centers. InfoWorld also celebrates people, companies, and projects.
In Free Expression in the Age of the Internet, Jeremy Lipschultz investigates the Internet and its potential for profound change, analyzing the use of its technology from social, political, and economic perspectives. Lipschultz provides new insights on traditional legal concepts such as marketplace of ideas, social responsibility, and public interest, arguing that from a communication theory perspective, free expression is constrained by social norms and conformity. In Free Expression in the Age of the Internet , Jeremy Lipschultz investigates the Internet and its potential for profound change, analyzing the use of its technology from social, political, and economic perspectives. Lipschultz provides new insights on traditional legal concepts such as marketplace of ideas, social responsibility, and public interest, arguing that from a communication theory perspective, free expression is constrained by social norms and conformity. Lipschultz explores social limits on free expression by first examining history of print and electronic media law and regulation. He utilizes the gatekeeping metaphor, the spiral of silence, and diffusion theory to explore current data on the Internet. He uses Reno v. ACLU (1997) as a case study of current First Amendment thinking. This book includes recent evidence, including samples of content from Internet gossip columnist Matt Drudge, and the investigation of President Clinton as it unfolded on the World Wide Web.The analysis is related to broader issues about Internet content, including commercial and other communication. The new technologies raise new questions about legal and social definitions of concepts such as privacy. Free expression is explored in this book under the umbrella of a global, commercial economy that places importance on legal rights such as copyright, even where those rights limit free flow of ideas. The Internet places free expression on two tracks. On the one hand, corporate players are developing cyberspace as a new mass media. On the other hand, the Internet is virtual space where individuals have the power to connect and communicate with others in ways never before seen. This groundbreaking text advancing new media scholarship uses the most current case studies from the Internet to show free expression in practice today. Lipshultz presents a relevant and efficacious social communication theory of free expression which critically examines the necessary factors involved in comprehensive policy analysis and enactment.
The only single, comprehensive textbook on all aspects of digital television The next few years will see a major revolution in the technology used to deliver television services as the world moves from analog to digital television. Presently, all existing textbooks dealing with analog television standards (NTSC and PAL) are becoming obsolete as the prevalence of digital technology continues to become more widespread. Now, Digital Television: Technology and Standards fills the need for a single, authoritative textbook that covers all aspects of digital television technology. Divided into three main sections, Digital Television explores: * Video: MPEG-2, which is at the heart of all digital video broadcasting services * Audio: MPEG-2 Advanced Audio Coding and Dolby AC-3, which will be used internationally in digital video broadcasting systems * Systems: MPEG, modulation transmission, forward error correction, datacasting, conditional access, and digital storage media command and control Complete with tables, illustrations, and figures, this valuable textbook includes problems and laboratories at the end of each chapter and also offers a number of exercises that allow students to implement the various techniques discussed using MATLAB. The authors' coverage of implementation and theory makes this a practical reference for professionals, as well as an indispensable textbook for advanced undergraduates and graduate-level students in electrical engineering and computer science programs.
TV & Video Engineer’s Reference Book presents an extensive examination of the basic television standards and broadcasting spectrum. It discusses the fundamental concepts in analogue and digital circuit theory. It addresses studies in the engineering mathematics, formulas, and calculations. Some of the topics covered in the book are the conductors and insulators, passive components, alternating current circuits; broadcast transmission; radio frequency propagation; electron optics in cathode ray tube; color encoding and decoding systems; television transmitters; and remote supervision of unattended transmitters. The definition and description of diagnostics in computer controlled equipment are fully covered. In-depth accounts of the microwave radio relay systems are provided. The general characteristics of studio lighting and control are completely presented. A chapter is devoted to video tape recording. Another section focuses on the mixers and special effects generators. The book can provide useful information to technicians, engineers, students, and researchers.