Broadcast: to digital and beyond. (Technology).

Digital television broadcasting started out as a means of doing everything that analogue does but more efficiently. But to the vast majority of viewers watching programmes through an aerial, bandwidth multiplexing and transmitter, power savings mean nothing.

Indeed, with most transmissions now delivered by a third party, such notions don't tend to mean much to broadcasters either. Meanwhile, viewers hungry for more channels can almost always get more choice with satellite, and more local channels with cable. Satellite TV in particular has the luxury of spare channels that can be ...

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