The EAP-3901 is an advanced embedded audio processor which can simultaneously process up to 32 channels of audio (16 channels of embedded audio from the video plus others generated internally). Functions include down-mixing, proc amp, channel shuffling and mixing. Options include automatic loudness control, dynamic processing (limiter, compressor and expander) and loudness measurement. The EAP-3901 generates audio/video fingerprints (via an iControl option) to detect and measure lip sync errors in a broadcast facility. The new loudness measurement option allows the measurement and logging of up to four audio programs with iControl loudness monitoring software to analyze and report compliance with respect to various loudness regulations.
- Video
- 3G/HD/SD input
- Supports 3Gb/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 continuity of embedded audio
- Flexible HD/SD/URS reference input
- Minimum processing delay of 8 µs, but additional delay can be added up to 15 frames
- Bypass relay with EAP-3N01-3SRP-R rear module
- Compatible with iControl end-to-end A/V fingerprint analyzer for lip sync error detection and measurement
- Optional optical fiber IO module with EAP-3N01-3SRP-F rear module
Metadata
AFD (SMPTE-2016), VLI (RP-186) and WSS insertion
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 timecode user bits, they can also be used for automation, user preset recall and loudness reset
Audio
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)
Optional on-board automatic loudness control with Grass Valley wideband processing
Optional loudness measurement of up to 4 audio programs and logging with iControl
Loudness compliant to EBU R128-2014, ATSC A/85:2013 (FCC CALM compliant) and ARIB TR-B32 (ITU-R BS.1770-3)
Audio delay adjustments of up to 2 seconds to compensate for lip sync issues
On-board socket for 1 optional module expansion:
Dolby E and Dolby Digital decoder
Dolby Digital and Dolby Digital Plus encoder
Dolby E encoder
Linear Acoustic upMAX
Linear Acoustic AEROMAX automatic loudness control