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audio for video feature
will need to create new workflows Once connected and configured user-defined folder upon completion.
which rely on different types of such tools can become intelligent Hot folders are easy to set up and use,
technology infrastructures. Content processing nodes that can be readily and can greatly speed integration
will need to be created and then adapted for different day-to-day time within some facilities.
repurposed for numerous different operations and work flows, including: This level of integration and control
receiver platforms with varying use • Post-production QC and correction -
For audio
provides new, more efficient ways of
cases and capabilities - from mobile File-based media and/or audio assets
processing,
tackling current and emerging audio
phones to full HD ready televisions, can be analysed, logged and, if
new tools
related challenges, the examples of
from non linear online VOD to HD necessary, corrected in faster than real
are
which will relate to loudness (with
terrestrial and satellite. time before being delivered to clients. and without metadata), encoding
emerging
technology and mutlichannel versus
which can stereo sound up/down mixing.
easily
integrate
Loudness correction with
into existing
metadata embedded
or new file-
This gives users the ability to
based post-
automatically normalise the loudness
production
of all their file-based content in faster
network
than real time while preserving their
infra-
original dynamic range. This process
structures.
guarantees that important metadata
Broadcasters and operators need to • Post-production file encoding and parameters such as dialogue
know and control what their audiences decoding - File-based audio
Once
normalisation are set properly for
are receiving, they need scalable and bitstreams (eg Dolby Digital Plus, connected every file (programme) without user
flexibile solutions which provide reliable Dolby Pulse, Dolby E) can be encoded
and
intervention and without the time-
and consistent content delivery. Single and decoded to/from multichannel
configured
consuming measurement and
stream technology is crucial to the WAV or broadcast WAV files with or
such tools
correction processes that were
delivery of next generation broadcast without Dolby audio metadata. previously done in real time.
sound. It provides the mechanism by From a use case point of view, file-
can become
For example, for coded audio data
which broadcasters and operators can based tools such as the DP600 are
intelligent
types that include metadata such as
deliver a bandwidth efficient single designed to fit seamlessly into
processing
Dolby Digital Plus, Dolby Pulse, or
audio stream to their customers’ homes existing work flows – providing three
nodes that
Dolby E, the loudness normalisation
containing all the information required main methods of control:
can be
process is achieved by automatically
for the receiver to play back either in • Manual control - Users can set up
readily
analysing the audio bitstream and
surround sound, stereo or mono and initiate processing jobs on an then comparing this analysis with the
(depending on features and individual basis from a simple-to-use
adapted for
stream’s metadata. If a mismatch is
capabilities) as well as provide audio interface. different detected, the DP600 will
description services and consistent • Third-party control via web
day-to-day
automatically correct the metadata
dynamic range and loudness control services - The DP600’s processing
operations
values without having to decode and
across channels and programmes. This engines are also available as a set of
and work
re-encode the audio stream
is especially important when web services. Manufacturers can
considering services over terrestrial and directly integrate these engines, at
flows
Loudness correction without
IP where bandwidth is limited. any level, into their workflow to metadata embedded
In order to prepare content for create a seamless user experience
delivery, new file based workflows are without impacting day-to-day The DP600 can also correct coded
being created based on LAN IP operations. and linear audio data types that do
technology providing a greater level of • Automatic hot-folder ingest not include metadata, such as MPEG-1
automation - managing tasks whilst process - Users can create hot folders LII and LPCM. For these audio data
offering more control over content and predefine a work order profile for types, the loudness normalisation
and how it needs to be processed for each one. The profile governs the process is achieved by automatically
different receiver platforms. DP600’s behaviour with specific analysing the audio bitstream and
For audio processing, new tools are broadcast media types. All media files then comparing this analysis with a
emerging which can easily integrate moved to a hot folder are user-defined target loudness value. If
into existing or new file-based post- automatically processed based on the a mismatch is detected, the DP600
production network infrastructures. folder’s profile and delivered to a will automatically scale the loudness
to match the target value
Encoding, decoding &
transcoding
The DP600-C version of the Program
Optimiser offers direct access to Dolby
technologies typically found in real-
time codecs. These processes can be
easily combined with each other or
with the intelligent loudness analysis
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www.ibeweb.com l may/june 2009 l ibe l 17
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