0091B - Conversion Lag
v1.0
published
0091B
v1.0
CONVERSION LAG
Conversion Lag
Frame Rate Conversion Issue
No Conversion Lag
Location
https://qc.ebu.io/items/0091B/versions/1-0-0/
Check
Report
Summary
- EBU QC Id
- 0091B
- Name
- Conversion Lag
- Status
- published
- Category
- subjective
- Lead editor
- Annabel Polanco
- Aliases
- Tags
- lagging conversion
Versions
| Version | Status | Edition date | Saved by | Note |
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Details
- Description
- "Conversion lag" or "Standards conversion lag" is an artifact generated by converting a segment of video from one frame rate to another. It looks like images 'catching up with themselves', often caused by 3:2 pull-down.
- Definition
- Used in Checks, the system shall review content for conversion motion lagging. Optionally, the system may report timecodes of where lag occurs.
Used in Reports, the system reports timecodes of where lag occurs. - References
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- Examples
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Output: "Check Result" = false
Output: "Conversion Lag Segment" = from 00:30:03;00 to 00:32:03;00
Remark: Used as a Check.
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Output: "Conversion Lag Segment" = from 00:30:03;00 to 00:32:03;00
Remark: Used as a Report.
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Input parameters
| Name | Default value | Description | Data model name | Unit | Locator |
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Output parameters
| Name | Alias | Description | Data model name | Unit | Locator |
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Test material
| Title | Version | Download |
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Remarks
- Remarks
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Note there also is a Test for 'stuttering video', see #1109B (Latest version)
Note there also is a more precise, absolute test, see: #0096B (Latest version) If that one detects no problems, you may still want to check with this current Test.
User discussions
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