- EBU QC Id
- 0010B
- Name
- Loudness
- Status
- published
- Category
- absolute
- Lead editor
- Roman Meszmer
- Aliases
- Tags
- audio
Version | Status | Edition date | Saved by | Note |
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- 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
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[http://tech.ebu.ch/docs/r/r128.pdf EBU R 128]
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[http://tech.ebu.ch/docs/tech/tech3341.pdf EBU Tech 3341]
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[http://tech.ebu.ch/docs/tech/tech3342.pdf EBU Tech 3342]
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[http://tech.ebu.ch/docs/tech/tech3343.pdf EBU Tech 3343]
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[http://tech.ebu.ch/docs/tech/tech3344.pdf EBU Tech 3344]
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[https://tech.ebu.ch/docs/r/r123.pdf EBU R 123]
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ITU-R BS.1770-3
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ATSC A/85
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- Examples
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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 10:00:01:22Remark: When no input is provided defauls apply: LoudnessExpectedTargetLevel = -23.0, LoudnessTargetLevelExpectedTolerance = +-0.5
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Input: "Loudness Range Expected Permitted Tolerance" = 15.0 LU
Output: "Loudness Permitted Range Exceeded" = True
Output: "Loudness Range" = 16.2 LU
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- Remarks
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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.
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