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PRODUCT OVERVIEW
LOUDNESS CONTROL: TRANSMISSION
AERO.air (5.1)™ 10-Channel Transmission Loudness Manager
AERO.air (DTV)™ Transmission Loudness Manager
AERO.air (TV)™ Transmission Loudness Manager
Engineered on the foundation of the company’s supremely successful
first and second generation digital television audio processors,
the third-generation AERO.air enables broadcasters to deliver
compelling 5.1-channel surround sound while saving time,money, and
space. The AERO.air also represents the world’s first TV audio
processor to feature built-in Dolby® Digital (AC-3) encoding.
The comprehensive AERO.air is equipped with multiple loudness
controllers, dual upmixers, metadata management, as well as full-time
two-channel downmixing to support legacy stereo or analog paths.
Built-in AutoMAX-II™ processing detects incoming audio and
automatically upmixes only when necessary, producing a full-time
compelling 5.1-channel output. The processor accepts 5.1-channel
network audio, two-channel local audio, SAP/DVS, and digital or
analog auxiliary/EAS audio for processing. Available options include
HD/SD-SDI input for de-embedding any of the possible 16 audio
channels and vertical ancillary (VANC) metadata,
internal 5.1+2 dual Dolby Digital (AC-3) encoders, HD/SD-SDI I/O for
de-embedding and re-embedding up to 16 channels of audio plus SMPTE
2020 (VANC) metadata, auto-sensing Dolby E/AC-3 decoding, and
CrowdControl™ dialog protection.
The AERO.air is available in three configurations to support needs
ranging from simple dual stereo to 10 channels. Customers can
purchase with confidence knowing that their investment can be
upgraded to the fully featured version by purchasing an update that
can be installed via the front panel in just minutes.
AERO.one™ DTV Audio/Loudness Manager
Inconsistent DTV audio loudness, the leading complaint of television
viewers, is solved easily by the Linear Acoustic AERO.one DTV
audio/loudness manager. This third generation audio processor offers
broadcasters the simplest and most cost-effective solution for guarding
against loudness shifts and loss of surround sound available today.
Built-in loudness control, metadata control, and optional transmission
encoding make
AERO.one an ideal solution for affiliate stations seeking to match local
and network content and thus deliver a seamless surround-sound
experience for their viewers.
Upmixing is provided by the renowned Linear Acoustic UPMAX algorithm,
which provides compelling 5.1-channel audio with complete downmix
compatibility. The AERO.one also includes the new AutoMAX-II
auto-detection algorithm, which smoothly and automatically bypasses upmixing when applied content is already 5.1 channels. Options include
dual, redundant power supplies, built-in Dolby Digital (AC-3) encoding,
and HD/SD-SDI audio I/O.
The AERO.one is also available in a
dual stereo (2+2) version for stereo and SAP processing. This
version also contains a downmixer allowing input of 5.1 channel
audio and output of stereo LoRo or LtRt.
CARBON™
Hybrid Metadata Loudness Manager and Audio Encoder
The CARBON loudness
control solution features a patent-pending hybrid process that combines
loudness control and audio encoding, allowing an infinitely variable
adjustment between permanent and reversible control of source audio loudness and dynamic range. Capable
of working with any audio codec that supports metadata, the premier version of CARBON maximizes the
effectiveness of metadata within the Dolby Digital (AC-3) system. CARBON also accepts encoded or
baseband PCM audio via AES or HD/SD-SDI connections, and optionally supports processing of audio at
the transport stream level via DVB-ASI connections. MPTS via Gigabit Ethernet (GigE) will be supported
for cable and satellite applications.
AERO.mobile™ Audio Loudness Manager
for Mobile DTV
Audio for mobile DTV presents new
challenges. The dynamic range “comfort zone” used for mixing television
audio for viewing on stereo or surround in-the-home televisions is far
too wide for comfortable listening on typical earbuds or tiny speakers.
Background noise in many environments will define a relatively high
loudness floor — if the volume is increased for acceptable
intelligibility on soft passages, loud passages run the risk of causing
hearing damage.
The AERO.mobile™ employs newly developed psychoacoustic processing that
enables content to remain audible in noisy environments on small mobile
devices. Accepting mono, stereo, or Dolby® 5.1-channel station audio,
the unit includes all tools a broadcaster needs to deliver the most
satisfying experience appropriate for widely varying individual
listening environments.
LOUDNESS CONTROL: INGEST/QC
AERO.qc Audio Quality Controller
The AERO.qc allows users to fix loudness problems automatically and
in real time as audio enters the plant and is fed into the ingest
server. This ingest quality control system from Linear Acoustic
provides all of the tools necessary to get audio loudness right. The
AERO.qc couples the ITU BS.1770 loudness-measurement specification
with proprietary signal evaluation techniques to evaluate content
and make adjustments. Operator
intervention can range from full control of measurement and audio
adjustment to highly automated processing that requires little
oversight. Front-panel metering offers instant go/no-go feedback and
precise loudness adjustment. Options include Dolby E/AC-3 decoding,
additional advanced production upmixing algorithms, AERO-style
multiband loudness and dynamic range control, metadata generation
and monitoring, multichannel
analog output with speaker EQ, and HD/SD-SDI input and output. A
hardware remote volume and speaker control is available separately.
MONITORING
L.A.M.B.D.A.™
Professional Digital Audio and Metadata Monitor
Designed to enable audio and metadata monitoring throughout the entire
broadcast chain, the Linear Acoustic LAMBDA professional digital audio
and metadata monitor displays and reproduces up to 16 audio channels
from AES or embedded HD/SD-SDI input. The system accepts audio metadata
via 9-pin serial input or extracts it from the VANC space of an applied
HD-SDI input. Audio and metadata are displayed in combination to allow
for accurate monitoring. Included loudness monitoring per ITU BS.1770
enables operators to verify program loudness quickly and accurately. Any
channel, channel pair, or downmix can be monitored through the powerful
digitally
amplified two-way aluminum alloy subwoofer and HF speakers, a
front-panel headphone connector, or rear-panel balanced analog and AES
digital output. Options include Dolby Digital (AC-3),
Dolby E decoding, dual power supplies, and TCP/IP remote.
L.A.M.B.D.A.-II™
Professional Digital Audio and Metadata Monitor
LAMBDA-II enhances the functionality of the original LAMBDA with several
new features:
- A utility audio delay to allow up
to three frames of compensation for external video monitors.
- A 16-channel mode allows all
applied audio channels to be displayed simultaneously and reproduced
individually or as a 5.1 downmix.
- Quick navigation through four
dedicated function keys that allow direct channel selection, instant
preset recall, and downmix configuration.
LQ-1000
Loudness Control Monitor
The LQ-1000 evolved from extensive field experience with mixers and
broadcasters during post production and high-profile live events.
It provides
comprehensive loudness and peak level metering of up to eight
channels of 5.1 surround and/or stereo AES or SDI audio per
industry-standard ITU-R BS.1770, a crucial requirement for mixing
and transmitting in compliance with ATSC Recommended Practice A/85.
The 2RU device features a clear at-a-glance display
of all critical parameters on a large color OLED display. The
LQ-1000 offers metering in a simple cost-effective package for studio
mixing and plant-wide monitoring, making it ideal for
ingest and live sports event metering and control. Deploying the
LQ-1000 and AERO.qc throughout a facility maintains a common user
interface and display, improving consistency and reducing
operational errors.
METADATA & TOOLS
Model
LA-5180 MetaMAX™
Metadata Frame Sync/Generator
The Linear Acoustic Model LA-5180 Audio
Metadata Frame Synchronizer and Generator is an integral part of any
facility relying on the successful creation and continuity of
metadata for proper audio encoding. Useful in digital television
transmission, remote production, and DVD creation environments, the
flexible unit accepts professional audio metadata via a standard
RS-485 serial input, or as delivered inside the VANC space of an
HD-SDI stream. Model LA-5180 allows correction of incoming
errors, re-writing of all parameters and reversion to fully
adjustable internally generated values output via serial and HD-SDI.
Can also be used as a stand-alone generator. Optional AMAS Metadata
Analysis Software provides detailed display and analysis of critical
metadata parameters and user-definable limits for values drives error
indication and logging.
Model LA-5448 Frame Synchronizer and Rate Shaper
Maintaining consistent, error-free AC-3 bitstreams is critical for high quality audio transmission. Bitstreams
delivered from sources outside of the local plant must be synchronized
to local reference, must be free of errors and must be of a consistent
data rate to prevent multiplexer issues. Decoding and re-encoding AC-3
is expensive, degrades audio quality, and is therefore not an option.
The Linear Acoustic Model LA-5448 Frame
Synchronizer and Rate Shaper satisfies these requirements and more, all
without re-coding, and can process up to four separate AC-3
streams in a single rack unit. The Model LA-5448 is ideal for
applications where AC-3 streams are delivered from external sources and
must be multiplexed into a single transport stream. This requires
all streams to be locked to local reference, but also to be free of
errors and most importantly kept at a consistent data rate. As
there is no way to guarantee a fixed data rate from an external source,
it must be handled locally. The unit can also be used in
situations such as commercial insertions where content of varying data
rates needs to be combined into a single consistent output stream.
The Model LA-5448 can be located after a standard routing switcher able to
pass AC-3, and regardless of what stream is selected, the result will be
consistent and error free.
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