Broadcast Data Systems

Data transmission over TV and radio channels - more popularly known as teletext and RDS - is an increasingly important aspect of modern broadcasting technology. This book bridges the gap between established television and radio practice and the computer technology that is used in these new systems.

The background to the development of teletext is described together with the data signal format and coding methods used. The various units that are required to implement a complete system are described. Further chapters deal with such topics as subtitle preparation and recording, the networking of teletext data signals and regional requirements, teletext decoders and re-transmission of decoded teletext signals as a video signal, and the transmission of data using the MAC packet format. The special measuring techniques that are required to maintain broadcast networks and to test decoders for both tele-text reception and data distribution are described.

RDS (Radio Data Systems is a recent development that allows digital data to be combined with a VHF radio signal. The background is described together with the necessary techniques for both coding and decoding the data signal. Various applications are detailed including the use of RDS to provide a local traffic information service by interrupting networked radio programmes.

Both the authors are directly involved through their company, VG Electronics, in the design, manufacture and marketing of equipment for broadcast data systems, and this technical over-view is the definitive book on the subject. It provides vital and up-to-date information for engineers, managers, and systems and service planners in broadcast, cable and satellite services.

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