I have a TiVo Roamio with a Tuning Adaptor on a cable system that utilizes SDV. I believe I understand how SDV works.
I have a friend with a Roamio on a different provider (Comcast) who does not use a Tuning Adaptor. I do not believe Comcast implements SDV in his area (anywhere?).
My friend believes that the Comcast system somehow sends him certain linear cable channels using some sort of "on demand" mechanism based upon how many people on his "node" have requested the channel. He believes that certain channels are not present on his coax unless he tunes to them, and that his "node" manages bandwidth by adjusting the resolution based upon the channels that most people are tuned to.
I have never heard of this with a plain CableCard enabled device. Is Comcast doing this? I related to him that such a concept sounds like SDV, and if he is not using a Tuning Adaptor and SDV is not implemented by his provider, his CableCARD enabled Roamio is one-way. Also, there is no way for his provider to even know what channel he tunes to and that all of his available channels are present on his coax all the time.
So who is right? For Comcast is there some sort of virtual software Tuning Adaptor in the TiVo? Am I missing something?
p.s. This has nothing to do with content through the Comcast on demand app on a TiVo, only regular cable channels.
I have a friend with a Roamio on a different provider (Comcast) who does not use a Tuning Adaptor. I do not believe Comcast implements SDV in his area (anywhere?).
My friend believes that the Comcast system somehow sends him certain linear cable channels using some sort of "on demand" mechanism based upon how many people on his "node" have requested the channel. He believes that certain channels are not present on his coax unless he tunes to them, and that his "node" manages bandwidth by adjusting the resolution based upon the channels that most people are tuned to.
I have never heard of this with a plain CableCard enabled device. Is Comcast doing this? I related to him that such a concept sounds like SDV, and if he is not using a Tuning Adaptor and SDV is not implemented by his provider, his CableCARD enabled Roamio is one-way. Also, there is no way for his provider to even know what channel he tunes to and that all of his available channels are present on his coax all the time.
So who is right? For Comcast is there some sort of virtual software Tuning Adaptor in the TiVo? Am I missing something?
p.s. This has nothing to do with content through the Comcast on demand app on a TiVo, only regular cable channels.
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