 All satellite programming (some of which is available free-to-air via Freesat or free-to-view via Freesat from Sky; the remainder requires a subscription to Sky), is broadcast using either DVB-S or DVB-S2.Subscription-based cable television from Virgin Media uses DVB-C, alongside a limited selection of analogue channels.In North America, DVB-S is often used in encoding and video compression of digital satellite communications alongside Hughes DSS.