Difference between revisions of "YUV"
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In I420, chroma planes (blue and red) are subsampled in both the horizontal and vertical dimensions by a factor of 2. | 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 | + | For a 2x2 group of pixels, you have 4 Y samples and 1 U and 1 V sample. |
| − | == YV12 == | + | === YV12 === |
| − | YV12 is exactly like I420, but with '''U''' and '''V''' reversed. | + | 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. | ||
| + | |||
| + | 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. | ||
= Packed = | = Packed = | ||
Revision as of 20:56, 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.
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.
