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0129B - Black Levels Shift
published
0129B v1.0
Item image
BLACK LEVELS SHIFT
Shift in Black Levels
Mid Shot / Scene / Asset
No Black Levels Shift
Location
https://qc.ebu.io/items/0129B/versions/1-0-0/
Check
Report
Summary
EBU QC Id
0129B
Name
Black Levels Shift
Status
published
Category
subjective
Lead editor
Annabel Polanco
Aliases
Tags
Versions
Version Status Edition date Saved by Note
Details
Description
A shift in black levels is a change in minimum luminance value mid scene, shot or asset level.

Black level shifts impact the technical and content quality of the asset. The overall look of the scene or shot will not be consistent with the intended look of the programme, thus not fulfilling the creative vision of the producers. Customer experience will also be negatively affected as the look and tone of a shot may flash with a change, jarring them out of a seamless viewing experience.

This is rarely creative intent.

Any video derived from this asset will contain a Shift in Black Levels.
Definition
Used in Checks, the system shall review content for shifts in black levels. Optionally, the system may report timecodes of black error shifts.

Used in Reports, the system shall report timecodes of black error shifts.
References
Examples

  • Output: "Check Result" = false
    Output: "Black Levels Shift Segment" = from 00:30:03;00 to 00:32:03;00

    Remark: Used as a Check.

  • Output: "Black Levels Shift Segment" = from 00:30:03;00 to 00:32:03;00

    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
Title Version Download
Remarks
Remarks
User discussions
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