Differences between UYVY and YUY2 ?

[Debbie]

Hi All,

What are the differences between UYVY and YUY2 ?


Debbie

[Fred H]

I asked it often myself, but couldn’t find any good explanation about the DIFFERENCES.
Here are some links, but no one explains just the differences.

http://www.dvdrhelp.com/forum/archive/t200825.html

http://pub30.ezboard.com/flukesvideoboardfrm3.showMessage?topicID=69.topic

http://www.aussievideosearch.com/cframeformat.htm

Fred H

[junkmalle]

The difference is the order of the Y, U, and V components. This page has a good explaination:

http://www.fourcc.org/yuv.php

In short, the diference between the two is just the order of the YUV components.

YUY2: Y U Y V - Y U Y V - Y U Y V

UYVY: U Y V Y - U Y V Y - U Y V Y

The hyphens between the groups is just for clarity. Y is the intensity (ie, black and white TV portion) of the pixels. U and V are the color components. Just like RGB requires three bytes to specify a color, so does YUV. In these two encodings there is only half as much color information as intensity information, just like in NTSC and PAL TV signals.

Notice that each Y is surrounded by a U and a V in both cases. So you could build the full color of each pixel by using the U and V on either side.

[Debbie]

Thank you all for the info.