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#228817 23-Jan-2018 20:03
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Can tv company’s tell what your watching? If so how? You see all these ratings and stuff. They must know somehow if someone or no one is watching Shortland street haha.

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  #1947544 27-Jan-2018 14:41
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Sky might be able to if you connect your decoder to the internet, as they aren't exactly forthcoming about what they do and don't track and datamine.

 

For the rest it's survey-based. Over-the-air TV broadcast is one-way, and without a return data path they have no way of tracking you.


 
 
 
 


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  #1947599 27-Jan-2018 17:47
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In America they used to drive around in detector vans listening for signals from TVs in the houses they passed. Receivers also transmit weak heterodyne signals that can be used to determine the channel they are tuned to. 

 

 





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  #1947610 27-Jan-2018 19:14
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They take samples from around 550 households that represent the general population

Rikkitc , do you mean the UK? the licence fee is partly to support the BBC which as we all know has no ads

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  #1947614 27-Jan-2018 19:20
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No, I mean the USA. There was no license fee there because of the advertising but they used detector vans for survey purposes.

 

 





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  #1947630 27-Jan-2018 21:51
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The UK claimed to do that, but most people thought the vans were a ruse. Anyway these days there would be far too much RF around, and the IF so small because it never leaves the single chip reciever that I doubt it would work at all.

 

They give a select few people a box that they have to input who is in the room, and what is watching. Last person I know that had one it was back in the CRT Tv days and it had something to tell what channel the TV was on, I know that the later ones would plug into a sky box somehow, but no idea how they worked. People have to keep logging in when they are in the room watching to the box. May have changed now tho. No idea how it would cope with timeshifting or on demand etc viewing. The on demand would be accounted for by the streaming servers anyway.





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  #1947670 28-Jan-2018 07:58
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richms:

The UK claimed to do that, but most people thought the vans were a ruse. Anyway these days there would be far too much RF around, and the IF so small because it never leaves the single chip reciever that I doubt it would work at all.




They give a select few people a box that they have to input who is in the room, and what is watching. Last person I know that had one it was back in the CRT Tv days and it had something to tell what channel the TV was on,



You had to insert a coil inside of the tuner, find the local oscillator and the frequency of the channel watched was subtracted from it determining what you watched.

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