IQMDMO
SECTION 40b
IQMDMOOPS 150403 Version 1 Issue 2
40b.1
IQMDMO MPEG-2 Decoder
with MOLE™ Output
Module Description
The IQMDMO is a full broadcast quality MPEG-2
decoder with MOLE™ output. It supports multi-
standard 4:2:2 and 4:2:0 video decoding (up to
MP@ML and 4:2:2 Profile@ML) on dual SDI
outputs. The decoder accepts both single and
multi-program transport streams (SPTS and
MPTS) on two selectable Asynchronous Serial
Interface (ASI) inputs. Frame-accurate genlocked
output synchronization is featured as standard.
Audio decoding of MPEG-1 Layer II and direct
pass-through of AC-3 streams are supported by up
to four unbalanced digital audio outputs.
Teletext received to DVB standard EN 300 472
may be inserted into the VBI of the SDI output in
accordance with ETS 300 706.
Standardized as SMPTE 319M and 327M,
MOLE™ Technology enables an MPEG-2 decoder
to pass the encoding decisions from the original
encoding to any subsequent encoder through the
SDI signal. MPEG signals decoded with the
IQMDMO can then be manipulated in the same
manner as SDI video, allowing edits, wipes,
crossfades and digital effects to be performed. It is
then possible to re-encode with a MOLE™-
compliant encoder using the original coding
decisions with no loss of quality. It also enables
transcoding to be more transparent and flexible
enough to handle any constant or variable bitrate
input, with 4:2:2 or 4:2:0 video.
The IQMDMO accepts all current standard
definition formats used by DVB, ATSC and ARIB.
Its reduced size provides a highly cost-effective
solution for both single and multi-channel video
decoding where space is limited (e.g. OB trucks).
Multi-channel capability makes the decoder fully
suited for broadcast play-out operations where
several MPEG feeds need to be switched and
mixed along with uncompressed sources using
conventional digital video studio equipment:
contribution, distribution, head-end, regional
affiliate systems, etc.
RollCall remote control and logging system is
available as standard, allowing video and audio
fault or warning conditions to be reported and
logged over RollCall.
As standard, a full frame genlocking synchronizer
allows the outputs to be locked to an external
analogue reference to allow simple installation.
Alternatively, the outputs can be locked to the
incoming MPEG time reference.
The card features four unbalanced digital audio
outputs (AES/EBU). The audio circuit is capable of
decoding up to four MPEG1 Layer I/II (ISO 13818-
3) simultaneously. It can also pass-through up to
four Dolby Digital AC-3 streams (SMPTE 340M).
Any of the four AES audio outputs can be selected
for embedding into the output video in accordance
with SMPTE 272M.
The two ASI input interfaces can be configured to
automatically select between the two inputs upon
input signal loss (e.g. broken cable) as well as
automatically invert the ASI input(s) in cases where
the ASI signal(s) has become inverted by some
external process
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