The ADX-3981 from Grass Valley, a Belden Brand, is an advanced, high quality audio processor which de-embeds up to eight AES signals at 48 kHz 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, mixing and loudness measurement. Options include automatic loudness control and dynamic processing (limiter, compressor and expander). The ADX-3981 generates audio/video fingerprints (via an iControl option) to detect and measure lip-sync errors in a broadcast facility.
Supports 3 Gb/s 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
Optional optical fiber module
Compatible with iControl end-to-end A/V fingerprint analyzer for lip sync error detection and measurement
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
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
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