YUV420和YUV422之间的区别 [英] Difference between YUV420 and YUV422

问题描述

你能帮我理解YUV420和YUV422格式有什么区别吗？
我读过这个， http://www.fourcc.org/yuv.php ，但我可以'找到差异。

Can you please help me understand what are the differences between YUV420 and YUV422 format? I read this, http://www.fourcc.org/yuv.php, but I can't find the difference.

YUV420和YUV420 SP的意思是一样的吗？
并且YUV422和YUV422 I是否相同？

And does "YUV420" and "YUV420 SP" mean the same thing? And does "YUV422" and "YUV422 I" mean the samet thing?

谢谢。

推荐答案

4：2：2 ：以亮度采样率的一半对两个色度分量进行采样：水平色度分辨率减半。

4:2:2: The two chroma components are sampled at half the sample rate of luma: the horizontal chroma resolution is halved.

4：2：0 ：两个色度分量以水平和垂直方向的亮度采样率的一半进行采样（即有一个 U 和一个 V 每2x2组 Y s。

4:2:0: The two chroma components are sampled at half the sample rate of luma both horizontally and vertically (i.e. there's one U and one V per 2x2 group of Ys).

有关其他变体的信息，请参阅此，这个和这个。

For info regarding other variations, see this, this and this.

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