Programme Delivery Control

This specifies the signals sent as hidden codes in the teletext service, indicating when transmission of a programme starts and finishes.

In Germany and some other European countries, the older standard video programming system (VPS) is in use also known as format 2.

Effectively, the two systems do the same thing and most modern VCRs and stand-alone DVD recorders work with both signals.

PDC is transmitted once a second in special packets addressed as magazine 8 and text row 30.

Each label contains the scheduled start time and date for a programme and flags to indicate the state.