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The stride of a surface, sometimes called the pitch, is the width of the surface in bytes. For the YUV formats described in this article, the origin (0,0) is always the top left corner of the surface. These fall into several categories:įirst, you should be aware of the following concepts in order to understand what follows: This section describes the 8-bit YUV formats that are recommended for video rendering. For this reason, the MPEG-2 scheme is preferred in Windows, and should be considered the default interpretation of 4:2:0 formats. One of these is used in MPEG-2 video, and the other is used in MPEG-1 and in ITU-T Recommendations H.261 and H.263.Ĭompared with the MPEG-1 scheme, it is simpler to convert between the MPEG-2 scheme and the sampling grids defined for 4:2:2 and 4:4:4 formats. There are two common variants of 4:2:0 sampling. The dominant form of 4:2:2 sampling is defined in ITU-R Recommendation BT.601. Luma samples are represented by a cross, and chroma samples are represented by a circle. The following diagrams shows how chroma is sampled for each of the downsampling rates. 4:1:1 sampling is less common than other formats, and is not discussed in detail in this article. Every scan line contains four Y samples for each U and V sample.
WHAT FORMAT DOES DESKSCAPES 8 USE HOW TO
Explains how to describe YUV format types in Media Foundation.Ĭhroma channels can have a lower sampling rate than the luma channel, without any dramatic loss of perceptual quality.
WHAT FORMAT DOES DESKSCAPES 8 USE WINDOWS
This topic describes the 8-bit YUV color formats that are recommended for video rendering in the Windows operating system.