Ensemble Designs BrightEye 20 User Manual
This user guide provides detailed information for using the BrightEye™20
Analog and Digital Audio Embedder or Disembedder unit.
The information is organized into the following sections:
• Product Overview
• Functional Description
• Applications
• Rear Connectors
• Operation
• Front Panel Controls and Indicators
• Using The BrightEye Control Application
• Warranty and Factory Service
• Specifications
• Glossary
BrightEye-1
Analog and Digital Audio
Embedder or Disembedder
User Guide
Revision 4 SW v1.0.9
E
NSEMBLE
DESIGNS
TM
BrightEye 20
BrightEye 20 Analog and Digital Audio Embedder or Disembedder
PRODUCT OVERVIEW
The BrightEye 20 is a compact solution for embedding or disembedding. With SDI
input and output, and both analog and digital audio I/O, it is field configurable for
embedding or disembedding.
Mux/Demux mode, audio input source, AES group selection, VU status, and gain
adjustment can be monitored and adjusted from the front panel. More advanced
functionality is available via the BrightEye Control application.
A glossary of commonly used video terms is provided at the end of this manual.
FUNCTIONAL DESCRIPTION
BrightEye 20 is a versatile Audio Mux/DeMux (Embedder/Disembedder). It
supports four channels of audio, with both analog and digital I/O. Complete
control over audio levels and mixing and swapping between channels is provided
through the BrightEye Control application.
Demultiplex Operation
When configured as an Audio Disembedder (demultiplexer), BrightEye 20 extracts
the digital audio content being carried in an SDI video stream and produces
simultaneous digital audio (AES) and analog audio outputs.
The Group Select control is used to identify which of the four possible audio
groups is to be disembedded. The front panel Group Select control will illuminate
green to indicate that the selected group has been detected in the incoming video.
If that group is not present, the control will illuminate red.
The four output channels of the disembedder feed a 4 channel mixer/shuffler. This
mixer provides precise adjustment of audio level for each channel, and the ability
to assign input channels to any combination of output channels. Additionally,
signal phase inversion can be selected on a channel by channel basis to address
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BrightEye 20 Functional Block Diagram
SDI In SDI out
EmbedderDisembedder
4 Ch
AES Port 1/2
AES Port 3/4
AES
Rcvr
AES
Rcvr
Sample Rate
Converter
Sample Rate
Converter
2 Ch
2 Ch
4x4
Input
Selector
4 Ch
4 Channel
A to D
4 Channel
Mixer
Shuffler
4 Channel
D to A
AES
Formatter
Note: AES Outputs
shared with AES Inputs
Analog Audio I/O
0
upstream phasing problems. Peak Program and VU indication for each of the
four output channels is displayed through the BrightEye Control application and
on the front of the unit.
The output of the mixer is delivered simultaneously in digital form on the two
AES ports, and in analog form on the four analog audio outputs.
Multiplex Operation
When configured as an Audio Embedder (multiplexer), BrightEye 20 can take
either analog or digital AES audio signals and combine them with a 601 digital
video stream to produce a single output signal.
The video input is taken from the SDI In BNC. Selection of Digital (AES) or
Analog audio source is made with the Audio In control
Analog audio inputs are digitized to 24 bits of resolution at a sample rate of
48Khz. 128 times oversampling is used to provide the highest possible fidelity in
the digitized signal. The sample rate is automatically derived from the video
signal in order to meet the embedding requirement of synchronicity between the
digital video and digital audio signals. The analog audio inputs can be selected
with either a -10 dBu (pro-sumer) or +4 dBu (professional) reference level.
When digital audio inputs are selected, the 2 AES ports are automatically configured as inputs. The AES ports support standard two-channel audio streams at up
to 24 bits of resolution. These inputs are connected to digital sample rate converters that allow BrightEye 20 to be used with asynchronous digital audio sources.
The sample rate converters can accept sample rates from 32 to 96 kHz. They
produce 24 bit audio at 48 kHz which is locked to the clock rate of the video
input.
The four channels of the selected audio source (analog or digital) feed a 4 channel
mixer/shuffler. This mixer provides precise adjustment of audio level for each
channel, and the ability to assign input channels to any combination of output
channels. Additionally, signal phase inversion can be selected on a channel by
channel basis to address upstream phasing problems. Peak Program and VU indication for each of the four output channels is displayed through the BrightEye
Control application and on the front of the unit.
The four channels of mixed audio feed the embedder. The embedder can be configured to replace any content currently present in the video stream, or cascade
(append) the new content to any existing embedded audio. The embedder can be
configured to mark its content as any of the four possible embedded groups. This
new video stream will appear on the SDI Out BNC connector.
When embedding from analog audio, the AES outputs will present the output of
the audio mixing section. When embedding from AES sources, the analog audio
port configures for output and will present the mixer output in analog form.
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BrightEye 2
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BrightEye 20 Analog and Digital Audio Embedder or Disembedder
APPLICATIONS
The BrightEye 20 can be used as both an embedder or disembedder. Because of
this flexibility and compact form factor, it is very useful in applications where
size and versatility are important. Some examples of possible BrightEye 20 applications are given below.
Embedder (Mux)
In this application, the BrightEye 20 is configured as an embedder. Serial digital
video and analog audio input is converted and combined into a single SDI output
with embedded digital audio.
Disembedder (Demux)
With a quick front panel adjustment, the BrightEye 20 can be repurposed to act
as a disembedder. In this application, digital audio is broken out of the SDI input
for monitoring.
BrightEye-4
Analog Video Out
BETA SP
Analog Audio Out
601 w/ Embedded
Audio Out
BrightEye 2
ADC
BrightEye 20
Demux
AES A
AES B
DigitalVideo Out
BrightEye 20
Audio
Console
Mux
601 w/ Embedded
Audio Out
0
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REAR CONNECTORS
All connections to the BrightEye 20 are made on the rear of the unit. Refer to the
illustration below.
Power Connection
Connect a modular power supply to the 12 volt DC power input connection on the
far left of the unit. Use the locking ring to secure it.
USB Connector
The USB connector is used to provide more comprehensive control, diagnostics,
and upgrades to the unit from a PC or Mac. Use the BrightEye Control application included on CD-ROM to make adjustments as described in the OPERATION
section of this user guide.
AES 1/2 I/O and AES 3/4 I/O
The AES 1/2 I/O and AES 3/4 I/O are BNC connectors that can function as either
digital audio inputs or outputs. Each connector can input or output an AES
stream (each containing 2 channels.)
SDI Out
The SDI Out is a BNC connector that outputs serial digital video. This output
conforms to the ITU-R 601 standard for serial digital video, with SMPTE 259M
serialization at 270 Mb/s.
Analog Audio I/O
Analog Audio I/O is a HD15 connector that function as an analog input or
output.
SDI In
The SDI In is a BNC connector that accepts a serial digital video input. This
input should conform to the ITU-R 601 standard for serial digital video, with
SMPTE 259M serialization at 270 Mb/s.
Analog Audio Pinouts
Signal Pins Input Output
Aud 1 +, –, G 1, 2, 7 Input 1 Output 1
Aud 2 +, –, G 5, 4, 3 Input 2 Output 2
Aud 3 +, –, G 11, 12, 6 Input 3 Output 3
Aud 4 +, –, G 15, 14, 13 Input 4 Output 4
BrightEye 20 Rear Connectors
BrightEye 2
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AUD 2 AUD 1
---
+
+
-
AUD 4
AUD 3
+
1
6
11
+
BrightEye 20 Analog and Digital Audio Embedder or Disembedder
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OPERATION
Control and operation of the BrightEye 20 is performed from the front panel or
with the BrightEye Control application.
Some control settings are only available with BrightEye PC or Mac. These parameters
cannot be monitored or controlled with the front panel.
Front Panel Controls and Indicators
The front panel of the converter, shown in the figure below, provides status indicators and control over video input and output selection, and gain.
Status Indicators
The following status indicators are provided on the front panel:
In
Illuminate green when a valid input is present on the SDI In connector.
Mux
The currently selected Mux behavior (Demux, Replace, or Cascade) is illuminated green.
Audio
The currently selected audio input source (AES, -10 dB Analog, or +4 dB
Analog) is illuminated green.
Group
The AES group (1, 2, 3, or 4) currently selected for disembedding and digital to
analog conversion illuminates green when the selected group contains audio, and
illuminates red when the selected group does not contain audio.
Ch 1/2 and Ch 3/4
VU output level and the status of the Gain adjustment for each of these channel
pairs is indicated by the state the VU and Gain indicators. The VU indicator illuminates red when the audio level exceeds the headroom level set by the user
(with the Peak Indicator control in BrightEye PC or Mac.) Additionally, the VU
indicator illuminates orange when the output is above 0 VU, illuminates green
when the output is above -20 VU, and doesn’t illuminate when the output is
BrightEye 20 Front Panel
NOTE:
0
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below -20 VU. The Gain indicator illuminates red when the gain level has been
adjusted off from unity by the user. The 0 VU point corresponds in the digital
domain to the digital reference level (-18 or -20 dBFS) and in the analog domain
to the analog reference level (-10 or +4 dBu.)
Pwr (Power)
Illuminates green when power is applied to the converter and the internal
voltage regulator is functioning correctly.
ADJUSTING PARAMETERS FROM THE FRONT PANEL
Use the Mode, Right Arrow, and Left Arrow buttons to select and adjust
parameters from the front panel.
Pressing the Mode button activates the front panel for editing and tabs between
each section of editable parameters.
Pressing the Right Arrow or Left Arrow advances the selection within a given
section of parameters, or increases (Right Arrow) or decreases (Left Arrow) the
value of a selected parameter.
The LED of an edited parameter will blink for 15 seconds, after which time its value is
stored in memory. If power is interrupted before this 15 second timeout period has
elapsed, the edited state will not be not saved.
The controls and their indicators are described below :
Mux
This control selects the Mux behavior with the following choices:
Demux – Disembed the AES audio from the SDI signal
Replace – Embed audio (from either AES or Analog) into the SDI signal,
replacing the existing embedded content
Cascade – Embed audio (from either AES or Analog) into the SDI signal,
augmenting the existing embedded content
Audio
This control selects audio input for embedding (when the Mux control is set to
Replace or Cascade) with the following choices:
AES – Embed from the AES inputs
Anlg -10 – Embed from Analog Audio input, with a -10 dB analog reference
level
Anlg +4 – Embed from the Analog Audio input, with a +4 dB analog
reference level
NOTE:
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