0222W - Horizontal Subsampling
Summary
EBU QC Id
0222W
Name
Horizontal Subsampling
Status
published
Category
absolute
Lead editor
Jens SCHNEEWEISS
Aliases
H-Subsampling Horizontal Sub Sampling
Tags
video MXF MXF-only
Versions
Version Status Edition date Saved by Note
Details
Description
The horizontal subsampling specifies the ratio of luminance subsampling to colour difference subsampling in horizontal direction. Examples: 4:4:4, 4:2:2, 4:2:0.

A related metadata element in MXF is "Vertical Subsampling", see EBU QC Test ITem 0223W.
Definition
Used in Checks, the system shall read out the horizontal subsampling value indicated in the wrapper metadata and check if it matches the expected one specified in the input. Optionally, the system may report the horizontal subsampling value.

Used in Reports, the system shall read out the horizontal subsampling value indicated in the wrapper metadata and report it.
References
  • SMPTE ST 377-1

    Remark: MXF G.2.27 Horizontal Subsampling

  • User profiles

    Remark: E.g. the ARD-ZDF profiles

Examples
  • Input: "Horizontal Subsampling Expected" = 1
    Output: "Check Result" = false
    Output: "Horizontal Subsampling" = 4

    Remark: Used as a Check


  • Input: none
    Output: "Horizontal Subsampling" = 1
    Output: "Horizontal Subsampling Text" = 4:4:4

    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
This item is a Read Out only and includes no Measurement.
User discussions
Title Author Last update