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Case Study #1
TV4
(Stockholm, Sweden)
Since its launch in 1990, the TV4 of Sweden has gone on to
become the country’s largest commercial TV channel.
Recently, the channel’s edit suites in Stockholm have
undergone a massive multi-million kronor technical refit and
– as further evidence that Yamaha Digital Mixing Engines
(DMEs) are the perfect one-box solution for enhanced
broadcast efficiency – six DME24Ns now form the heart of
this cutting edge installation. Each DME unit is fitted with
MY8-ADDA96 AD/DA cards, replacing a wide range of
outboard studio devices, and in doing so, eliminating many of
the problems experienced by broadcasters when using patch
bays and equipment from a wide range of different
manufacturers.
JMG Support AB of the Bromma borough of Stockholm
installed the system. “We chose the DME solution because, as
a Yamaha dealer, we were familiar with the DME range and
the many different ways in which it can be controlled,” says
JMG Support’s Johan Küller. “Of course we also knew that
audio quality is excellent, so the customer would be very
happy with the end result.”
Each DME system at TV4 is setup to control two edit suites
and a recording/speaker booth shared between them. In
addition to all monitoring, the DME systems also handle all
switching and level control of audio recording sources,
which include a non-linear editing (NLE) system, videotape
Surround & Multi-Purpose Processor
recorders (VTRs), and a microphone in the booth. The system
also provides compression and limiting for the microphone.
Another input comes from telephone hybrids that TV4 uses
to accept calls from viewers and to record or broadcast their
messages. The DME systems allow the output from these
units to be monitored in the booth and in both edit suites, as
well as feeding it to the inputs of the NLEs and to a PC
located in the booth.
“Our biggest challenge was to create a highly user-friendly
interface,” says Johan. “The client wanted one-button
solutions for the most common scenarios and, as we looked
at all the different combinations of inputs and outputs, it
became clear how complex the switching could become. In
order to simplify the switching procedures to the level
desired by TV4, digital signal processing (DSP) was the only
practical solution."
“Because of the client’s requirement for simplicity of
operation, we also realized that we would need to produce
custom control panels. So the complexity of the system, plus
the requirement for simple switching and custom panels
meant that the Yamaha DME Series was by far the best
solution.”
Custom control panels are located both in the booth and in
each control room, which are connected to the serial ports of
the DME24Ns. In the booth, the operator selects whether to
record via microphone or telephone hybrid and whether to
route the signal to be recorded within the booth or in one of
the edit suites.
Within the edit suites, the operator has a control panel for
selecting whether to monitor the output of the NLE system
or the signal from the microphone or telephone hybrid.
Additionally, he can select whether to record from the booth
or from VTR and can also set the recording level.
“This was a challenging installation, particularly because the
system needed to be very adaptable, with complex switching
functions controlled in a very straightforward, intuitive way,”
says Johan. “The DME solution has provided TV4 with an
easy-to-use, high fidelity network offering vastly increased
audio fidelity."
“But the best thing is the flexibility of the system. Using the
DME software, we can easily change things that would – in a
non-DME installation – have required physical re-wiring,
taking much longer and, of course, causing TV4 plenty of
headaches. Now, the potential for such problems simply
doesn’t exist.”
Mainichi Broadcasting System, Inc.
(Osaka, Japan)
Galaxy Sub-control Room
Mini Sub-control Room
Surround & Multi-purpose Processor
Mainichi Broadcasting System (MBS) uses a DME64N for both
its Chichin Puipui show (a four-hour live broadcast) and
Galaxy Sub program. Two other DME64Ns are employed as
“mini subs” for news and sports programs – one being used
for staff and commentator monitoring, while the other has
been setup with surround-monitoring configurations for use
as a monitoring processor. And setup in an outsidebroadcasting
van, a further DME64N functions as a
multi-purpose processor for golf and auto-racing broadcasts.
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Case Study #2