资源说明：Basic aim of IPTV is to offer a complete package known as the triple play: voice, data, & video- that is, telephony, the internet & television. The single most amazing thing IPTV does is this: when the channel- surfer at home starts clicking away, the set-top box relays that fact to the data center, kilometers away. The server there stops sending the old channel selection and sends the new one. And it does all that in less than 200 milliseconds, so fast that the user has no idea that the programming wasn’t there in the set-top box all along, waiting for its chance to leap onto the screen! The most remarkable thing about IPTV is the way it replicates & even enhances the cable television experience, over a pair of thin copper wires.

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