iptv feature
includes IPTV, mobile and the Internet,
Audio metadata - a deeper
dialnorm (aka dialogue normalisation
as well as terrestrial, cable, and
look
or dialogue level), dynamic range
satellite services, Dolby Pulse marks an control, and downmixing.
important addition to Dolby’s suite of
Broadcasters are starting to realise the
Although technically not an
audio solutions. Our goal is to
importance of audio metadata and the
individual metadata parameter,
implement Dolby Pulse across the
capabilities it can provide in delivering
Audio
downmixing within the consumer’s
broadcast chain - in hardware, OEM
quality audio to consumers in a range
metadata decoder is carried out by specific
products, and licensed encoder and
of listening environments. provides
metadata parameters, and as with the
decoder solutions. Dolby Pulse is also
Audio metadata provides
broadcasters
other two parameters, care must be
compliant with new HDTV specifications
broadcasters with a ‘set-once’ control
with a ‘set-
taken in monitoring and selecting
set by key European industry bodies
over loudness and dynamic range
once’ control
suitable values. Care should be taken
including EICTA, the French and Spanish
removing the need to monitor,
to ensure that less optimal listening
HD forums, and NorDig.
compress, and adjust levels throughout
over loudness environments are accounted for:
the broadcast chain. This technology and dynamic
enjoyment of a television programme
The new Dolby MS10
provides audio engineers with the
range
should not be limited to those
decoding platform
tools to mix more consistent audio
removing the
consumers with full-blown HD home
content differently for varying playback
need to
theatre systems. This then comes
To support these multi-format
systems with varying capabilities. With
down to the skill of the engineer in
broadcasting requirements, Dolby is
metadata being added during
monitor,
setting the required metadata
introducing a new single platform
production or post-production, its
compress, and parameters.
called MS10 capable of decoding
effects are auditioned (in a very similar adjust levels
Dolby Pulse, Dolby Digital and Dolby
way to how mono compatibility was
throughout
Conclusion
Digital Plus and standard HE-AAC. This
tested when stereo first became
platform will be able to output in true
the broadcast
available) and set in the bitstream
chain.
Broadcasters must evaluate which
Dolby Digital as well as stereo and
using one of several commercially
coding scheme best suits them. HE-
pass-through. This platform will be
available tools. Once written into the
AAC based technology can be used
both Dolby tested and Dolby
bitstream, metadata becomes a part of
where bandwidth efficiency is of most
supported. Meanwhile, the first
the programme assets, instructing
concern and where a common format
decoder ICs to support Dolby Pulse are
downstream playback systems on how
for both broadcast and new media
expected to be rolled out in spring
best to reproduce the audio, be it 5.1
content is required. Dolby Digital Plus
2009, facilitating broadcast roll-out in
or stereo.
can be adopted where bandwidth
early 2010. An audio solution choice improvements over Dolby Digital are
depends on many factors. Today,
Three key metadata
required and where future bit-rate and
audio technologies must provide
parameters
surround sound scalability is important.
efficiency, compatibility, consistency All things considered, broadcasters
and predictability whilst delivering a
Metadata provides multiple
and operators alike seem to be
stunning audio experience no matter
parameters that are specifically
favouring the Dolby Digital Plus and
which broadcast platform is used.
intended to optimise the sound of the
HE-AAC audio coding schemes,
Dolby continues to pioneer new audio
programme delivered to differing
realising the growing importance of
technologies - pushing boundaries and
replay systems and environments of
audio metadata for controllable,
helping to make wonderful
which three are of special importance.
predictable and consistent high quality
audio/visual experiences possible.
These three parameters are known as
audio.
Relax with Hamlet.
Knowing your test and measurement equipment has a future proof upgrade path from
Analogue, through SD, HD to 3Gbps., with a selection of option modules to suite your
needs, you know you can relax, rest assured that your investment has been well placed.
TEST, MEASUREMENT, MONITORING AND SOFTWARE BASED QUALITY
CONTROL INSTRUMENTS!
•
•
MUL
3Gbps, HD, SD Composite, Embedded audio, AES/EBU....
TI-AWARD-WINNING go to: ourawards.tv
•
MODULAR Options
Awarded at IBC 2008
•
go to: flexiscope.tv
for the
•
EYE pattern with measurement and monitoring. Protean Axiom 3G
•
Test signal generator with measurement and monitoring.
See Hamlet
•
on Stand K40
•
HAND-HELD POR
Measurement and monitoring.
RACK-MOUNT
TABLE go to: microflex.tv
•
ST
go to: digiscope.tv or monitorscope.tv
•
SOFTW
AND-ALONE go to: monitorscope.tv
Awarded at NAB 2008
•
3Gbps, HD, SD HAND-HELD TSG**
ARE with PSE* Filters go to: vidscope.tv or reel-check.tv to FlexiScope for
go to: axiom3g.tv
Option 3
®
All FlexiScope modules can be user installed into all instrument
chassis, including DigiScope, MicroFlex and MonitorScope.
*PSE, Photo Sensitive Epilepsy. **TSG, Test Signal Generator
EXCELLENCE IN VISION
UK Free Phone: 0500 625 525 E-Mail: sales@hamlet.co.uk Web site: www.hamlet.co.uk
www.ibeweb.com l January/February 2009 l ibe l 23
Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40