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In the United Kingdom , digital set-top boxes (often referred to as '' Digibox es'', or smobies, after Sky Digital 's trademark for their unit) are usually for Digital Terrestrial Television through services such as Freeview , a service operated by the Freeview Consortium , or through digital satellite with BSkyB and also with digital cable. They are used to access television as well as audio and interactive services through the "Red Button" promoted by broadcasters such as the BBC with BBCi or Sky with Sky Active. Before cable-ready TV sets, a set-top box was used to Receive Analog cable TV Channel s and Convert them to one that could be seen on a regular TV (channel 3 or 4 in North America , or channel 6 or 7 in the United Kingdom ). A Digital set-top box is needed for receiving Digital TV Broadcast s, because the vast majority of TV sets do not yet have such a Tuner . In the case of Direct Broadcast Satellite ( Mini-dish ) systems such as SES Astra , Dish Network , or DirecTV , the set-top box is an Integrated Receiver/decoder (IRD). In IPTV networks, the set-top box is a small computer providing two-way communications on an IP Network , and decoding the video Streaming Media . SEE ALSO
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