By Wolfgang Hoeg, Thomas Lauterbach
This complete reference presents a great advisor for broadcasting engineers, making plans and procedure engineers, builders for pro and family gear brands, carrier and community companies, and broadcast companies. Postgraduate scholars and teachers in communications expertise also will locate this an invaluable advent to the realm of electronic broadcasting.
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Additional info for Digital Audio Broadcasting: Principles and Applications of Digital Radio
Eureka 147 DAB performed flawlessly at Las Vegas, but those opposing the system claimed that the topography around Las Vegas was much too favourable to put DAB to a real test. So it was requested that DAB should next come to the 1991 NAB Radio Show in San Francisco to be tested in a very difficult propagation environment. One main transmitter and one gap filler were set up and mobile reception in downtown San Francisco was impressively demonstrated. An announced demonstration of IBOC broadcasting did not take place as the equipment was not ready.
An announced demonstration of IBOC broadcasting did not take place as the equipment was not ready. In spite of the good results the opposition to DAB gained momentum and the NAB officially announced its preference for an IBOC system. This was not in line with the Introduction 9 intentions of the Consumer Electronics Manufacturers Association (CEMA) of the Electronics Industry Association (EIA) which came to an agreement with the NAB to run very strictly monitored laboratory tests in Cleveland and field trials in San Francisco comparing the Eureka 147 DAB with several US IBOC and IBAC (InBand-Adjacent Channel) systems.
It uses MPEG Layer II sound coding (as does DAB) at a fixed bit rate of 192 kbit/s for a stereo signal. Forward error correction is applied using a punctured convolutional code with code rate 3/4. The data are differentially encoded to provide easy synchronisation. QPSK modulation is used for each of up to 12 ADR sub-carriers which are combined with the analogue TV signal and are FM modulated. The baseband bandwidth of the digital signal is 130 kHz which is the same as for an analogue sound sub-carrier.
Digital Audio Broadcasting: Principles and Applications of Digital Radio by Wolfgang Hoeg, Thomas Lauterbach