eng TELE-audiovision 1411

TEST REPORT
MPEG-4 Encoder
MPEG-4 Conversion
in Real-time
When it comes to efficient
transmission of digital
video signals, MPEG-4 is
THE established standard
these days. But then again,
head-ends are still frequently
faced with analog source
signals or digital signals that
have been compressed using
MPEG-2. If those signals
need to be provided in DVB-
S/S2, DVB-C/C2 or DVB-T/
T2 modulations, there is no
way around converting them
into the MPEG-4 format – in
real-time!
And we’re not only talking
country-wide cable
networks, mind you! Even
small-scale applications such
as a limited offering of TV
channels via DVB-C or DVB-
T in hotels or hospitals use
MPEG-4 as state-of-the-art
compression format, since it
handles signals much more
efficiently and therefore is
able to transmit more channels
with better quality on
the same number of available
transponders. Given this
fact, it does not make sense
any more to throw money after
MPEG-2.
While this sounds reasonable
enough in theory, the
real world poses a number
of challenges. What if devices
such as cameras or
reception equipment are not
yet capable of directly processing
MPEG-4 signals? Of
course, it’s always possible
to replace existing technology
with new state-of-the-art
equipment, but this involves
considerable amounts of
money. Opting for an MPEG-
4 decoder instead does away
with the need for such a major
investment.
Or you may simply want
to feed signals from MPEG-2
transponders into your local
MPEG-4 network. Here, too,
an MPEG-4 decoder is an efficient
solution.
Or what if you need to distribute
the content of your
PC monitor to a number of
workplaces in order to present
animations or simulations
in real-time? Once
again, an MPEG-4 decoder
will get you there without a
lot of hassle.
So here we are, presenting
to you a device that will
solve all those problems. It’s
called CW-4412 and comes
from CableWorld, a company
focusing on developing and
manufacturing professional
digital equipment such as
receivers, modulators, signal
meters, transport stream
generators, analysers, multiplexers,
converters as well
as MPEG decoders and encoders.
CableWorld has been
in business for more than 20
years now and its product
portfolio has been growing
impressively.
CableWorld has four different
MPEG-4 encoders on
offer, all of which belong the
same product family:
CW-4411: single H.264
encoder with ASI and IP outputs
CW-4412: two H.264 encoders
with ASI and IP outputs
CW-4511: single H.264
encoder with IP output
CW-4512: two H.264 encoders
with IP output
All of these four models
come with the same encoder
type and an identical
front-end. This makes for remarkable
ease of operation
since all encoders feature
the same user interface. It
is thus possible to obtain differently
equipped encoders
www.TELE-audiovision.com/14/11/cableworld
11-12/2014
CableWorld CW-4412
MPEG-4 Encoder Duo
Amazing results with this
very easy-to-use MPEG-4 encoder
16 TELE-audiovision International — The World‘s Leading Digital TV Industry Publication — 11-12/2014 — www.TELE-audiovision.com