The way it works is that the host device, like a TiVo, tunes to a given channel. If that channel is flagged as being an SDV channel, and not a normal linear channel, then the host device would communicate with the Tuning Resolver over USB requesting that channel. The Tuning Resolver would then translate that request into the local cable system’s SDV protocol and request it from the head-end. The head-end responds by sending the frequency that the channel has been dynamically assigned on the system. The Tuning Resolver then passes that information back to the host, which then uses its tuner to tune to that frequency to receive the channel. All of the channel tuning is done on the host itself, the Tuning Resolver is simply a communications node.

Where the “box” does the actual decoding of the digital stream (and selection of channels). We shall wait and see. . .

I dont’ want to hit next channel, wait for the tivo to tell the cable box to go next channel, then see the channel change. Thats crap.