Kitplus - The TV-BAY Magazine

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recording on VHS, which was often hit and miss! If you set up a programme to record at 6pm you taped whatever was showing at that time regardless of time changes and overruns. With the advent of digital TV thankfully things have moved on and it’s the EPG data that provides a vital role in ensuring that the record and series linking functionality works correctly. Now to enable us to record, every programme has an event ID logged within the EPG, so that fi ve minutes before the programme starts and fi ve minutes after it has fi nished, the set-top box will record against that specifi c event. This means that if the programme is delayed or moved, providing the EPG is modifi ed accordingly, the set-top box will still make the recording ensuring that all those shows that you recorded in the week are linked and ready to watch when you are. Taking that a step further, as well as recording and linking programmes, the EPG has an important role to play when it comes to conditional access and encryption. There’s a whole variety of content delivered to our TV screens and second-screen devices; some is free-to-air and some is encrypted. Like the series link functionality, the set-top box, which is decoding the broadcast stream, has to be told when to start and stop the encryption. This has a number of implications. Firstly there’s the fi nancial aspect because the channel doesn’t want to lose revenue if material is aired for free by mistake. But perhaps more important is the regulatory implication: channels have to adhere to very strict broadcasting guidelines. The triggering of these actions on the set-top box is all driven by the EPG data. It’s the responsibility of channels to provide this information to platforms, which are heavily reliant on the data being accurate to satisfy viewers and to provide a competitive advantage. Quite simply without the EPG there is no content discovery and without content discovery there are no programmes. THE LAST BATTERIES YOU WILL EVER NEED. KITPLUS - THE TV-BAY MAGAZINE: ISSUE 95 NOVEMBER 2014 | 59 TV-BAY095NOV14.indd 59 06/11/2014 13:06