Talán ez segít.
Sajnos magyarul még kevésbé érteném, így abban nem tudok segíteni, de nem lennék meglepődve, ha az UV coringot használnák. Azt hiszem, érdemes gyorsan végigfutni a szöveget, mert a coring többször előfordul benne.

3.2.6 Formatting
The color difference signals U and V are sampled at 16 MHz, the same frequency as the luminance signal. This data format of 4:4:4 at the output of the A/D converters is adapted to the bandwidth of the U and V signals and converted to the 4:2:2 or 4:1:1 format for further processing.
In the process of downsampling to 4:2:2 a first lowpass filter is used to limit the bandwidth (-3dB at 3.5 MHz). If further downsampling to 4:1:1 is selected a second lowpass filter reduces the bandwidth to 1.75 MHz. In the 4:2:2 format a slight coring can be selected to reduce offsets around zero. The curves are shown in fig. 8. The amount of coring must be seen in relation to the local wordlength of 11 bits signed. So based on the 9 bit signed output data width the selectable coring settings by the parameter 89B&25,1* are: coring off / 0.5 LSB / 1 LSB /
2 LSB.
http://www.nxp.com/documents/application_note/AN99022.pdf