The main parameters of CCIR 601 are listed below:
|Sampling frequency for Y (MHz)||13.5|
|Sampling frequency for U and V (MHz)||6.75|
|No of samples per line||720|
|No of levels for Y component||220|
|No of levels for U,V components||225|
Most digital video recording systems comply with CCIR 601 or a subset of it.
The 625-line (PAL) DVC compression standard (not DVCPRO) specifies this 4:2:0 sampling pattern:
DVC is field-aware, and this diagram is meant to show an interleaved frame. In the 625-line DVC sampling pattern, Cr and Cb samples are not co-sited. Instead, we get a whole line of Cr samples from each field, then we get a whole line of Cb samples from each field. The top two lines of the standard DVC frame contain Cr samples.
A (German) overview of the DV compression formats:
|pm:||4.2.0 comression is used by PAL|
|4.1.1 comression is used by NTSC|