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.