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Linear Acoustic LA-5180 Metadata Frame Sync/Generator Operation Manual
Chapter 1: Introduction
The Linear Acoustic LA-5180 Audio Metadata Frame Synchronizer and Generator
is an integral part of any facility relying on the successful creation and continuity of
metadata for proper audio transmission. The flexible unit accepts professional audio
metadata (also known as Dolby or Dolby E metadata) via a standard RS-485 serial
input, or as delivered inside the VANC space of an HD-SDI stream. The LA-5180
then corrects or replaces bad or missing metadata packets. Stable metadata is then
output via RS-485 and also selectably back into the VANC space of the applied HD-
SDI signal. The LA-5180 can also be used as a stand-alone audio metadata generator,
with eight presets available to store all required parameters for both the professional
metadata (also known as Dolby E metadata) and the consumer metadata (also known
as the AC-3 metadata).
Optionally, the LA-5180 can be provided with Audio Metadata Analysis System (AMAS)
to give users in-depth metadata error reporting. Individual metadata parameters are dis-
played two programs at a time, with all programs being monitored in the background. Er-
ror rules and parameter ranges and interactions are user-configurable. Summary red light/
green light on-screen indications are provided by a Windows(R) compatible application
connected via TCP/IP to the LA-5180. A rear-panel GP Output can be commanded to
indicate the presence of warnings or errors.
The Linear Acoustic LA-5180 has the following features:
•
Frame synchronization and/or generation of audio metadata: output errors are
prevented by repeating or replacing any bad frames or unit can be used as a stand
alone generator
•
Metadata input via HD-SDI or RS-485, output via RS-485 and/or HD-SDI
•
Metadata 'silent frame' mode replaces errored or missing metadata frames with
known good internally stored versions
•
GPI and front panel control of unit operation
•
Fast 'manual revert' mode quickly replaces incoming metadata on command
•
Dual, redundant power supplies and hard-bypass for mission critical applications
•
Optional AMAS metadata analysis system
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