Ericsson SPR1100 Operations Instructions Page 299

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Automatic Loudness Control
5.0 counts as 5 channels and therefore requires 3 licenses.
For 2 5.0 services, this requires 2 encode instances and each instance requires 3
licenses. In total 6 licenses.
The ALC license is in addition to any other required audio licenses.
F.4.4 Further Information
Recommendation ITU-R BS 1770-2 ‘Algorithms to measure audio programme
loudness and true-peak audio level’
Recommendation ITU-R BS.1771, ‘Requirements for loudness and true-peak
indicating meters’
EBU Working Group PLOUD http://tech.ebu.ch/loudness
EBU Technical Recommendation R 128 ‘Loudness normalisation and permitted
maximum level of audio signals’
EBU Tech Doc 3341 ‘Loudness Metering: ‘EBU Mode’ metering to supplement
loudness normalisation in accordance with EBU R 128’
EBU Tech Doc 3342 ‘Loudness Range: A measure to supplement loudness
normalisation in accordance with EBU R 128’
EBU Tech Doc 3343 ‘Practical Guidelines for Production and implementation in
accordance with EBU R 128’
EBU Tech Doc 3344 ‘Practical Guidelines for Distribution of Programmes in
accordance with EBU R 128’
ATSC Recommended Practice: ‘Techniques for Establishing and Maintaining
Audio Loudness for Digital Television Document’ A/85:2011, 25 July 2011
2/1553-
FGC 101 1400 Uen B
F-11
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