audio interfacing
Interfacing is an area of technology that has
been dominated by video, which hasn't
changed as the need to interchange between
SD and HD continues. Audio hasn't been
overlooked - A-D and D-A have become so
familiar as sets of initials that there is usually
no need to explain they mean analogue to
digital and digital to analogue conversion - but
it was perceived as the second tier in the
whole business of connecting a broadcast
Kevin Hiltonchain. reports.
A sticky issue
lue equipment, as it is converted to match the station to flesh out the range as users come
popularly known, is as format, a growing requirement with across new applications."
important as ever, more material being re-used for This year Sonifex made the move
dispelling the myth that platforms other than conventional into vision with the RB-VHDA8
digital would do away television. In doing this broadcasters 3G/HD/SD-SDI video distribution
G
with the whole concept are realising that video, while still a amplifier, again a response to market
of interfacing, but the focus is shifting prime consideration, is fairly demand but also a way for the
towards sound, with the growing straightforward to deal with. "If company to expand beyond radio. At
requirement to deal with multiple material is being re-purposed for the IBC in September Sonifex will launch
channels of audio at broadcast centres Internet or mobile TV the actual image an audio embedder and de-
and OB sites, matching it all to
Glue
doesn't change," said Elliott. "But embedder. Television broadcasters
different frame rates and transmission
equipment,
what is done with the audio is very have been moving to embedded
formats. Because of this, observes different and a whole raft of audio increasingly this decade,
as it is
Guy Elliott, managing director of interfacing has to be considered." particularly for distribution. Brooke
popularlysystems integration company ATG Marcus Brooke, managing director says this has further brought together
Broadcast, the need for interfacing is
known, is as
of specialist audio manufacturer audio and video, particularly with
growing, not reducing, and the critical
important as
Sonifex, agrees there will "always be embedded sound in SDI and HD
area is audio.
ever,
a call for glue equipment". This belief streams and modern chip sets
"With SDI it became a lot of easier
dispelling
has seen Sonfiex's range expand from handling both media.
to connect equipment," he said, on-air mixing desks and telephone The big names in glue products -
the myth
"because we didn't have to worry hybrids for radio to include more Evertz, Harris, Miranda and Snell -
about timing problems and cable that digital general interfaces, such as have recognised the importance of
lengths, as we did with analogue. HD
would do
microphone, distribution and audio interfacing and expanded
has created a whole range of new
away with
matching amplifiers and A-D/D-A ranges that at one time were
challenges for interfacing and in terms
the whole
converters. dominated by video. The focus is
.of sound there's 5.1, 7.1 and audio These formed the core of the Red embedding and de-embedding; this
concept of
2
1
swaps, so the amount of interfacing Box range which, says Brooke, was a year Evertz introduced the 7721AE8-
interfacing.
e
g
that needs to be done is not response to customer requests. "We AC3E-HD, a HD/SD-SDI 8 AES
a
P
decreasing at all." looked at what areas were key to embedder with a Dolby Digital (AC-3)
n
o
Even as broadcasters standardise on radio and pro audio and continued encoder and the 7821AD8-3G de-
d
e
new technology, Elliott says, different from there," he explained. "We've embedder with integrated Dolby u
n
i
t
file formats are coming into a been asked quite a bit for TV gear in metadata extractor, while at NAB
n
o
broadcast centre and these have to be recent years and that has been added Harris launched the Platinum router, a
C
10 l ibe l september/october 2009 l
www.ibeweb.com
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