Keywords
digital radio, Eureka 147, DAB
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Abstract
This document was originally produced in 1994 as a way
of collecting together a lot of information about the then-new
Digital Audio Broadcasting (DAB) system being developed as
a European project (Eureka 147). At that time, the first
public international standard had not been published, and
as a result the document was highly sensitive and was released
only within the BBC to enable staff coming to work on the
project to quickly grasp the fundamentals of the DAB system.
Nearly ten years later, much of the
information is still highly relevant to the DAB system
now on air
in many countries around the globe. Some parts of the
DAB system have been modified compared to the 1994
Eureka specification, but usually in a backwards compatible
manner. For example, Eu-147 DAB only specified three "RF
Modes", but EN300-401 specifies a fourth, additional
mode.
Within BBC R&D, this document is still used as
an excellent reference by many working on DAB who neither
need nor require the intricate details but do require
a "broad-brush" understanding of the system.
Whilst originally the document was highly confidential,
the passage of time has seen all of the information
contained move to the public domain, and so it has
been suggested that the document should be re-issued
to a wider audience. It must be noted, however, that
the text is largely unaltered from the 1994 original
and therefore may contain errors or omissions when
compared to the latest DAB standards. In all such cases,
the published international standards are definitive.
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