zen Genius (geniusbb@xxxxxxxxx): > yuv 4:2:0, does it mean for every four sample of luminance we sample > two U components and zero V components. No. It means for every four luma samples we have one U chroma sample and one V chroma sample, and most applications use the Y', Cb, Cr excursions. > while for yuv 4:4:4, and luminance and chrominance are sampled at same > rate. Yes, that means that for every luma sample we have both chroma samples. > I get confusion for yuv x:y:z with sampling rate for Y, Cr, Cb > components. Any idea ? I've read some documents which try to explain what the numbers mean, but most just end up brushing it off. Since there's only 4:2:2, 4:2:0, 4:1:1 and 4:4:4 you need to worry about, just memorize what they mean and be happy. -- Billy Biggs vektor@xxxxxxxxxxxx
