The 8 AES audio + metadata de-embedder is an advanced, high quality audio processor which de-embeds up to eight AES signals at 48kHz from a 3G/HD/SD video signal.
The ADX-3981 can simultaneously process up to 32 channels of audio (16 channels from the embedded audio input plus others generated internally). Functions include downmixing, proc amp, channel shuffling and mixing. Options include automatic loudness control (ALC), dynamic processing (limiter, compressor and expander) and loudness measurement. The ADX-3981 generates audio/video fingerprints (via an iControl option) to detect and measure lip-sync errors in a broadcast facility.
The ADX-3981 has one on-board socket for optional modules, which can offer Dolby decoding, Dolby encoding and stereo upmixing using Linear Acoustic upMAX technology. One other module provides ALC using AEROMAX technology by Linear Acoustic, capable of maintaining constant loudness across different audio programs.
- Video:
- 3G/HD/SD input
- Supports 3Gbps level A (mapping 1) and level B
- Audio/video de-glitcher to handle video hot switch at the input
- Automatic detection of input video loss and switchover to local grey for continuous audio/video output synchronization
- Flexible HD/SD reference using the internal URS frame reference
- Minimum processing delay of 8 us, but additional delay can be added up to 15 frames
Metadata:
AFD (SMPTE-2016), VLI (RP-186) and WSS insertion
Linear timecode (LTC) embedding into DVITC (SD) or ATC (HD)
Audio metadata insertion and extraction (SMPTE 2020-A)
RS-422 serial data input and output to carry audio metadata
3 GPI I/O that can be inserted or extracted in the TC user bits, they can also be used for automation, user preset recall and loudness reset
Audio:
8 AES outputs
Full audio shuffling and mixing on a channel basis
32 channels internal audio processing
Automation capabilities based on audio signal type detection
Audio 5.1 surround downmix to Lt/Rt or Lo/Ro
Audio dynamic processor option (compressor/limiter/expander)
Audio delay adjustments of up to ±2 seconds to compensate for lip sync issues
Optional on-board automatic loudness control with Grass Valley wideband processing
Optional loudness measurement of up to ±4 audio programs and logging with iControl
