MPEG-4
aacPlus/DTS Audio Transcoding System and Linear Acoustic
Contribution Chain Implementation of DTS Coherent Acoustics
Provides Broadcasters with Highly Advanced Solutions
for Discrete Multi-Channel Sound. Designed specifically
to meet the challenges faced by broadcasters in production,
contribution and emission of multi-channel audio for
HD, the solution provides previously unattainable efficiencies
in the delivery of high quality surround sound broadcast
to consumers. It also provides major improvements and
workflow efficiencies in the transport of multi-channel
audio and associated metadata throughout the production
chain.
The
DTS/Coding Technologies aacPlus/Coherent Acoustics
transcoding scheme enables the transmission of aacPlus-encoded
5.1-channel audio at a rate of 160 kbps with the same
audio quality as 384 kbps Dolby® Digital transmissions*.
The aacPlus signal is transcoded to a 1.5 Mbps DTS
Coherent Acoustics signal in the consumer set-top
box. In this way broadcasters adopting aacPlus have
immediate access to a consumer install base of over
50 million DTS-enabled systems worldwide.
Set-top-boxes
featuring aacPlus/DTS transcoding are already in development
using single chip decoders integrating the aacPlus/DTS
transcode, which are available from a number of IC
manufacturers.
At
the opposite end of the signal chain, DTS and Linear
Acoustic have jointly developed a series of hardware
tools that provide enhanced performance for contribution,
distribution and emission workflows of multi-channel
audio. These new units are based around an implementation
of the DTS Coherent Acoustics superior compression
algorithm and, as embodied in the Linear Acoustic
StreamStacker-HD™ series of products, the new
format is known as e2 (e-squared).
e2
provides a best-in-class compressed audio transport
mechanism that addresses all of the current problems
of channel errors, asynchronous switching, elimination
of pops, clicks, or noise bursts, and unrecoverable
metadata errors (even with corrupted data streams).
The Coherent Acoustics-based e2 compression format
is fully compatible with existing AES/EBU and Dolby®-E
infrastructures. The format fully supports all legacy
workflows, including Dolby-E metadata, as well as
handling Advanced Audio Metadata. In this way e2 supports
everything current, as well as provides the necessary
upgrade path for future HD production workflows.
Together,
these DTS-partnered technologies provide a highly
advanced end-to-end solution for HDTV multi-channel
audio based on open standards, and a solution that
offers major advantages over current technology and
practice within the DVB standards.
*
Results proven in third party tests conducted by various
independent organisations, including the EBU (European
Broadcast Union), MPEG (Moving Pictures Expert
Group), and IRT (Institut für Rundfunktechnik).
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Date
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Origine
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Société
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Auteur
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Agence
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Rwtr
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03/10/2006
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CP/Mail
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DTS
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JPL
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| Rubrique |
Audio |
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