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0010B - Loudness
published
0010B v2.0
Item image
LOUDNESS
I, TP, Max S, Max M, LRA
EBU R 128, ITU-R BS.1770-3
Compliant I, TP, User Levels
Levels, Correction Gain
https://qc.ebu.io/items/0010B/versions/2-0-0/
Check
Report
Summary
EBU QC Id
0010B
Name
Loudness
Status
published
Category
absolute
Lead editor
Roman Meszmer
Aliases
Tags
audio
Versions
Version Status Edition date Saved by Note
Details
Definition
System shall check for programme loudness, loudness range, maximum momentary loudness, maximum short term loudness and true peak.
This must be done for each audio service in the programme file according to user definable channel mapping where location of different stereo and 5.1 mixes within audio channels can be defined.
References

  • [http://tech.ebu.ch/docs/r/r128.pdf EBU R 128]

  • [http://tech.ebu.ch/docs/tech/tech3341.pdf EBU Tech 3341]

  • [http://tech.ebu.ch/docs/tech/tech3342.pdf EBU Tech 3342]

  • [http://tech.ebu.ch/docs/tech/tech3343.pdf EBU Tech 3343]

  • [http://tech.ebu.ch/docs/tech/tech3344.pdf EBU Tech 3344]

  • [https://tech.ebu.ch/docs/r/r123.pdf EBU R 123]

  • ITU-R BS.1770-3

  • ATSC A/85

Examples

  • NO inputs
    Output: "Loudness Target Level Integrated Intolerance" = True
    Output: "Loudness Target Level Integrated" = -23.2 LUFS
    Output: "Loudness Maximum TruePeak Exceeded" = True
    Output: "Loudness Maximum TruePeak" = -0.5 dBTP on Channel 1 at 10:00:01:22

    Remark: When no input is provided defauls apply: LoudnessExpectedTargetLevel = -23.0, LoudnessTargetLevelExpectedTolerance = +-0.5

  • Input: "Loudness Range Expected Permitted Tolerance" = 15.0 LU
    Output: "Loudness Permitted Range Exceeded" = True
    Output: "Loudness Range" = 16.2 LU

Input parameters
Name Description
Output parameters
Name Description
Test material
Title Version Download
Remarks
Remarks
The system may have user adjustable thresholds for the loudness parameters to identify files that may contain abnormal audio (for example an inconsistent mix).

If Dolby metadata is used, the system should compare that to the measured loudness level, see EBU QC Criteria 0010X.
User discussions
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