GUIDE TO INSTALLATION AND OPERATION
FRS-3901 |
1
1 FRS-3901 3Gbps/HD/SD Frame Synchronizer with Embedded Audio
Processor
1.1 Introduction
The FRS-3901 is a highly integrated module which offers frame synchronization and video/audio processing, including
color correction and delay, for 3G, HD and SD signals in 3Gbps/HD/SD hybrid plants. The FRS-3901 features 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 downmixing, Proc Amp, channel
shuffling and mixing. Options include Automatic Loudness Control, dynamic processing (limiter, compressor, and
expander) and loudness measurement
. The FRS-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 4 audio programs with iControl
Loudness Monitoring software to analyze and report compliance with respect to various loudness legislations around
the world (See iControl Loudness Monitoring).
The FRS-3901 has one on-board socket for optional modules,
including Dolby E and Dolby Digital decoding, upmixing
using Linear Acoustic upMAX™ technology, Dolby E encoding, Dolby Digital and Dolby Digital Plus encoding. In
addition to Miranda’s own automatic loudness control (ALC) solution for up to eight programs, the AMX-3981 offers
ALC
using the AEROMAX™ technology by Linear Acoustic
, or Level Magic™ by Jünger Audio, implemented using
optional modules.
The card will pass and delay automatically all 32 internal audio channels to preserve lip-sync between the channels.
Each channel can be delayed independently to correct any lip-sync issues. All audio channels can be mixed and
shuffled to provide 16 channels for embedding in the video output.
An Automatic Preset Recall feature provides basic automation to select user preset based on the status of the
incoming audio.
When genlocked to an external reference or to the frame reference using the internal URS signal, the FRS-3901 can
handle video hot switches at the input without losing sync at the output. In absence of the video input, the card can
freeze the output to the last good frame, field or black.
The card has
a frame buffer which allows an increase in the video delay of up to 15 frames to compensate for the long
audio processing delay required by some modules.
The FRS-3901 has 3 GPIO that can be used as input or output to embed or extract GPI events to/from the Time Code
user bits in transport applications, or they can be used simultaneously to trigger the card's user presets.
Dolby Metadata insertion in the VANC is possible from multiple sources, such as a Dolby E decoder module, an
embedded VANC stream, an external RS-422 link, or from the integrated Metadata generator. All parameters in the
Metadata stream can be probed and monitored. Dolby Metadata can be used to steer the behavior of the audio
downmix and upmix modules.
The FRS-3901-3SRP-R rear module has a bypass relay that can be used to bypass the main input directly to the
output in the event of card failure, loss of power, or card removal.
The FRS-3901-3SRP-F rear module has a fiber input/output cartridge. Once the cartridge is installed, the inputs or
outputs are selectable through the control interface. The input of the card allows you to select between fiber and
copper inputs. The outputs are via copper and fiber simultaneously (with appropriate fiber cartridge).