Co-sited sampling

This is a sampling technique applied to color difference component video signals (Y, Cr, Cb) where the color difference signals, Cr and Cb, are sampled at a factor of the luminance, Y, frequency – for example as in 4:2:2. If co-sited sampling is applied, the two color difference signals are sampled at the same instant, and simultaneously with a luminance sample. Co-sited sampling is the ‘norm’ for component video as it ensures the luminance and the chrominance digital information is coincident, minimizing chroma/luma delay.

4:2:2 Co-sited sampling

Co-sited sampling