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0281B - Audio Level Shift
published
0281B v1.0
Item image
AUDIO LEVEL SHIFT
Audio Level Shift
Level Increase/Decrease in dB
No Extreme Level Shifts
Level Shifts, Location
https://qc.ebu.io/items/0281B/versions/1-0-0/
Check
Report
Summary
EBU QC Id
0281B
Name
Audio Level Shift
Status
published
Category
human-only review
Lead editor
Gregory Almond
Aliases
Volume Shift
Tags
Versions
Version Status Edition date Saved by Note
Details
Description
The abrupt change of base or peak audio levels unintentionally or non-diagetically.
Definition
Used in Checks, the system shall verify if the audio volume levels abruptly shift positively or negatively within seamless content. Optionally it may report the shift and the relevant location(s).

Used in Reports, the system reports the location(s) of material with audio shift, and the degree in which the audio increased/decreased.
References
Examples

  • Output: "Check Result" = false
    Output: "Audio Level Shift" from 00:39:00:00 to 0:39:04:00 :
    --> "Service Channel Allocation" = 2
    --> "Audio Level Shift Degree" = +6 dB
    Output: "Audio Level Shift" from 00:51:00:00 to 00:51:02:00 :
    --> "Service Channel Allocation" = 3
    --> "Audio Level Shift Degree" = -3 dB

    Remark: Used as a Check.

  • Output: "Audio Level Shift" from 00:39:00:00 to 0:39:04:00 :
    --> "Service Channel Allocation" = 2
    --> "Audio Level Shift Degree" = +6 dB
    Output: "Audio Level Shift" from 00:51:00:00 to 00:51:02:00 :
    --> "Service Channel Allocation" = 3
    --> "Audio Level Shift Degree" = -3 dB

    Remark: Used as a Report.

Input parameters
Name Default value Description Data model name Unit Locator
Output parameters
Name Alias Description Data model name Unit Locator
Test material
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Remarks
Remarks
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