The 7720AE4 Audio Embedder inserts AES audio signals into a 270Mb/s SDI video signal as specified in SMPTE ST 272. The companion 7720AD4 Audio Deembedder facilitates audio demultiplexing at the destination.

SMPTE ST 272 allocates four groups of four audio channels that can be embedded into the SMPTE ST 259 bitstream. The 7720AE4 embeds up to 4 AES audio signals into two groups on the SDI outputs for discrete 5.1 audio applications. The 7720AE4 is Dolby E compliant when the sample rate converters are turned off.

VistaLINK® enables control and configuration capabilities via Simple Network Management Protocol (SNMP). This offers the flexibility to manage the module status monitoring and configuration from SNMP enabled control systems such as Evertz VistaLINK® PRO locally or remotely.


  • Automatic detection of 525 line and 625 line input
  • Bypass relay protection on one SDI output for power failures
  • 20-bit AES input and audio embedding
  • Individual audio group assignment for each group
  • Group lock mode maintains phase relationship between the groups for 5.1 audio applications
  • Sample rate conversion disable on AES inputs to permit Dolby E® embedding
  • Programmable audio delays (up to 7 frames in ½ video field increments using DIP switches or up to 1.35 seconds in 1 sample increments with VistaLINK® control
  • Ancillary packet cleaning mode removes all audio before embedding
  • Ancillary packet reformatting mode left justifies and removes unused packets before embedding
  • Embeds audio on internally generated black or blue video when there is no video input
  • Card edge LEDs indicate video and audio signal presence, and module fault
  • VistaLINK® capable for remote monitoring, control and configuration capabilities via SNMP; using VistaLINK® PRO, CP-2116E or CP-2232E Control Panels. VistaLINK® is available when modules are used with the 3RU 7800FR frame and a 7800FC VistaLINK® Frame Controller module in slot 1 of the frame

Download Datasheet


Serial Video Input
StandardSMPTE ST 259-C (270Mb/s) 525 or 625 line component
Number of Inputs1
ConnectorBNC per IEC 61169-8 Annex A
EqualizationAutomatic 210m @ 270Mb/s with Belden 8281 or equivalent cable
Return Loss> 15dB up to 540Mb/s
Serial Video Output
StandardSame as input
Number of Outputs2 (1 bypass relay protected)
ConnectorBNC per IEC 61169-8 Annex A
Embedded Audio
StandardSMPTE ST 272
Resolution20 bits
Sampling Rate48 KHz synchronous
Signal Level800mV nominal
DC Offset0V ±0.5V
Rise/Fall Time900ps nominal
Overshoot< 10% of amplitude
Return Loss> 15dB up to 270Mb/s
Wideband Jitter< 0.2UI
AES Audio Input
StandardSMPTE ST 276, single ended AES
Number of Inputs4
ConnectorBNC per IEC 61169-8 Annex A
Resolution20 bits
Sampling Rate32kHz to 96kHz synchronous or asynchronous
48kHz synchronous AES required when sample rate converter is disabled
Impedance75Ω unbalanced
Level1V p-p ±0.1V
System Performance
Embedding Latency1.3ms to 3ms
Audio Delay
DIP Switch ControlUp to 7 frames, ½ frame increments (delay applied to all AES channels)
VistaLINK® or Serial Port ControlUp to 1.35s in 1 sample increments (independent control of delay for each channel)
Voltage+12V DC
Power9 Watts
EMI/RFIComplies with FCC Part 15 Class A, EU EMC Directive
Number of Slots1

Ordering Information

7720AE4SD-SDI 4 AES Audio Embedder
Ordering Options
NotesRear plate must be specified at time of order - eg: [model]+3RU
Rear Plate Suffix
+SAStandalone Enclosure Rear Plate
+3RU3RU rear plate for use with 350FR, 7700FR-C or 7800FR Multiframes
350FRPortable Multiframe which holds 7 single slot modules
7700FR-C3RU Multiframe which holds 15 single slot modules
7800FR3RU Multiframe which holds 15 single slot modules
S7701FR7700 Series Standalone Enclosure
7800FCVistaLINK® Frame Controller
CP-2116E-HSystem Control Panel, One Touchscreen LCD and 16 LCD Buttons
CP-2232ESystem Control Panel, 2RU, Two Touchscreen LCDs and 32 LCD Buttons