ARCHIVE: The TV Room
Overnight encrypted programming for specialist audiences.
Video content
[00:00:00] TEST CARD: the standard BBC One version of Test Card F, accompanied by tone.
A minute of black and silence from [00:01:00].
And at [00:01:01] we see the addition of a data stream at the top of the viewable area of the screen. The New Scientist explains this:
“The BBC does not expect people to subscribe to all 15 services, but to start with one or two and then pay for others, getting the extra services without needing a new card. So the decoder must unscramble only those services authorised by the card.
“But the [BBC Select] decoder must also be able to modify the card to authorise new services as extra subscriptions are paid. The updating instructions will be broadcast, along with the descrambling codes, as an 800 kilobit per second data stream, contained in the top scanning lines of the picture.”
The full article is available here.
[00:02:00] IDENT: the long version of the BBC Select ident.
[00:07:00] PROGRAMME: the first couple of minutes of an edition of Executive Business Club. This programme is scrambled.
RELATED ARTICLE: you can view the junction that followed this one here.
Acknowledgements
PICTURED: BBC Select ident. COPYRIGHT: BBC.
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