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HD/SD-SDI Audio De-embedder & Dolby-E®/AC-3 Decoder & Re-embedder

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The 7720AD8-DD-HD Audio De-embedder and Dolby® Decoder & Reembedder extracts embedded audio from four specified groups as defined by ST 299-1 from a 1.5GB/s serial HDTV or as defined by SMPTE ST 272 from a 270MB/s serial SDTV video signal.

One selected channel is processed by the on-card Dolby® Decoder. If the channel contains Dolby-E® or Dolby® Digital (AC-3), it will yield up to eight additional discrete audio channels, two channels of stereo downmix and the associated Dolby-E® Metadata. Up to 16 selected channels may be optionally delayed up to 1.2s and re-embedded into the output video and/or directed to AES outputs. Video output may be optionally delayed to help with lip sync. If PCM audio is embedded, the device acts as a simple four group audio de-embedder.

This device also handles the Dolby-E® Metadata. Metadata is optionally embedded in VANC and can be provided as an output for downstream devices (i.e. Dolby Encoders, Multichannel Audio Tool, etc.). Metadata can be monitored using VistaLINK® and dial norm parameters can be modified.

For lip sync cohesion and ease of editing, Dolby-E® data is organized in blocks with lengths matching the associated video frame. The decoder will match the beginning of each output block with the start of video, as provided with the genlock input. Additional delay can be dialed up by the user, up to 1.2 secs. The eight AES inputs can be configured as a backup, in the event the primary is lost, or as a voice-over source.

IntelliGain® Audio and Loudness Processor

  • Consistent audio loudness levels within a channel and/or program
  • Automatic detection and level adjust for loud commercials
  • Gain control within a program interval to preserve audio dynamic range
  • Artifact-free transitions between program and commercials
  • Elimination of drastic volume changes during commercials and interstitials

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.


  • Audio de-embedder and re-embedder for four groups of audio
  • Dolby E/AC-3™ decoding for selected audio source
  • Dolby Metadata is embedded in HD VANC for downstream device decoding
  • Eight AES inputs for backup, voice-over or Dolby E/AC-3™ content
  • Adjustable video delay to match Dolby® decoder audio delay
  • Automatic switchover to backup audio source on loss of selected Dolby stream
  • Headphone jack for monitoring stereo down-mix or any input source
  • Two full audio mixers with 16 output channels
  • Card edge display
  • 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
  • Inputs

  • Program input supporting both HD (1.5GB/s) and SD (270MB/s)
  • Reference input supporting NTSCM, PAL-B and tri-level for meta data phasing
  • Eight AES inputs for backup/voice-over source
  • Metadata input
  • Outputs

  • Two processed HD outputs (one protected with bypass relay)
  • Eight AES de-embedded and processed outputs
  • One DB-9 Dolby metadata (RS-422/485) on same connector as input
  • Card Edge LEDs

  • Module Status
  • Video Signal presence
  • Selected audio group presence
  • Dolby decoder processing status
  • Genlock health/compatibility
  • AES signal presence


Serial Video Input

Standard ST 292-1, (1080i/60, 1080i/59.94, 1080i/50, 1080p/30 (sF), 1080p/29.97 (sF), 1080p/25 (sF), 1080p/24 (sF), 1080p/23.98 (sF), 720p/50,720p/60, 720p/59.94, 1035i/60, 1035i/59.94)
SMPTE ST 259-C (270MB/s) 525 or 625 line component
Connector BNC per IEC 61169-8 Annex A
HD 15m @ 1.5GB/s with Belden 1694A
SD 300m @ 270MB/s with Belden 1694A

Processed Serial Video Output

Standard Same as input or user controlled
Number of Outputs 2
Connector BNC per IEC 61169-8 Annex A
Signal Level 800mV nominal
DC Offset 0V ±0.5V
Rise And Fall Time Per standard
Overshoot < 10% of amplitude
Wide Band Jitter
HD < 0.16UI
SD < 0.10UI

Metadata I/O

Type Dolby-E® Metadata, SMPTE RDD6
Connector Femaled B-9
Baud Rate 115,200 baud
Vanc Embedding SMPTE 2020

AES Audio Input

Standard SMPTE 276M
Number of Inputs 8 unbalanced
Connector Female High Density dB-15 (breakout cable to BNC provided)
Input Level 0.1 to 2.5V p-p (5V p-p tolerant)
Input Impedance 75Ω
Return Loss > 25dB 100kHz to 6MHz
Equalization Automatic to 1000m with Belden 1694A (or equivalent) @ 48kHz AES signal
Sample Rate 32kHz to 48kHz

AES Audio Output

Standard SMPTE 276M, single-ended AES
Number of Outputs 8 unbalanced
Connector Female High Density dB-15 (breakout cable to BNC provided)
Sample Rate 48kHz
Impedance 75Ω
Resolution Up to 24-bit

Genlock Input

Type NTSC, PAL, black or any tri-level, all autodetect
Connector 1 BNC per IEC 61169-8 Annex A
Impedance Hi-Z or 75Ω (jumper configurable)
Return Loss > 40dB to 10MHz


Voltage +12V DC
Power 21 watts
EMI/RFI Complies with FCC Part 15 Class A, EU EMC Directive


Number of Slots 2

Ordering Information

Notes Requires 7700FC for full module control
7720AD8-DD-HD HD/SD-SDI Audio De-embedder & Dolby-E®/AC-3 Decoder & Re-embedder

Ordering Options

Notes Rear plate must be specified at time of order - eg: [model]+3RU
+IG IntelliGain Loudness Processor
Rear Plate Suffix
+SA Standalone Enclosure Rear Plate
+3RU 3RU rear plate for use with 350FR, 7700FR-C, 7800FR or 7801FR Multiframes


350FR Portable Multiframe which holds 7 single slot modules
7700FR-C 3RU Multiframe which holds 15 single slot modules
7800FR 3RU Multiframe which holds 15 single slot modules
7801FR 1RU Multiframe which holds up to 4 single slot or 2 dual slot modules
S7701FR 7700 Series Standalone Enclosure


7800FC VistaLINK® Frame Controller
CP-2116E-H Remote Control Panel
CP-2232E Remote Control Panel
WPAES8-BNCM-6F Cable (included)