Difference between revisions of "YUV"
Jump to navigation
Jump to search
(→Planar) |
(→NV12) |
||
| Line 15: | Line 15: | ||
== NV12 == | == NV12 == | ||
| − | In NV12, you have one luma "luminance" planes '''''Y''''' and one plane with '''''U''''' and '''''V''''' data interleaved. | + | In NV12, you have one luma "luminance" planes '''''Y''''' and one plane with '''''U''''' and '''''V''''' data interleaved. NV12 is considered as ''semiplanar''. |
In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2. | In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2. | ||
Revision as of 20:57, 18 May 2011
Contents
Planar
I420
In I420, you have luma "luminance" planes Y and chroma planes U, V.
In I420, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2.
For a 2x2 group of pixels, you have 4 Y samples and 1 U and 1 V sample.
YV12
YV12 is exactly like I420, but with U and V order reversed.
NV12
In NV12, you have one luma "luminance" planes Y and one plane with U and V data interleaved. NV12 is considered as semiplanar.
In NV12, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2.
For a 2x2 group of pixels, you have 4 Y samples and 1 U and 1 V sample.
NV21
NV21 is like NV12, but with U and V order reversed.
