comcast cablebox coax to XboxOne HDMI

OK so I have a small cablebox from comcast, all it does is take the incoming coax cable from the splitter, and then it outputs to coaxial cable to my TV. I want to know if there is anyway for me to convert this cable to HDMI to run through my Xbox One or PC.

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Clarification Request
What is your TV set to ?

Is it on Channel 2 or 3?

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set to channel 3

the tv is set to channel three

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Ugly. Expensive.
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Clarification Request
We really need to know the actual box make/model

If it's the box I think you have though, that won't work. In order to provide (at least partial) compatibility with the 'HDMI in' behind your Xbox One console, you need to rent a Comcast box with proper HDMI output.

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Sounds like you have one of these oldie but...

goodie TV. Why not newer tv instead of all these conversion/adapter stuff?

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