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VideoPlus PDC explained
To counteract this, a system called
Programme Delivery Control or PDC,
sometimes known as Video Programme by
Tjletext or VPT, was devised. This was
introduced by the brand name Startext.
When a programme is transmitted, a
unique PDC code is also transmitted as
part of the teletext system. This code
is selected by the viewer via a cursor
on the teletext listing page, and
identifies a particular programme. A
Startext VCR will recognise this code
and start recording at whatever time
the programme is transmitted. 6/9
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