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1080i programming sometimes showing at 720i

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  • #1

    1080i programming sometimes showing at 720i

    I tried searching this forum and did not see this anywhere - I wonder if anyone else has encountered this and whether there is a good explanation for it?

    I have a TivoHD connected to a Vizio plasma via HDMI cable. I noticed this weekend that some HD programming was coming in at 720i, not 1080i. This morning I did some experiments and some channels would come in at 1080i and when I switched away then back again, would then be 720i!!!

    FYI I first noticed this AFTER I swapped in a (supposedly) high performance HDMI cable (Blue Jeans Cable). Obviously I am going to try going back to the old one, but wondered if this was something others had encountered.

    Roger
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  • #2
    Change the format to 1080i fixed. Right now, it is changing the format based on the actual format being broadcast, rather than upconverting to 1080i.

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    • #3
      I don't understand - the same program is 1080i and 10 seconds later is 720p. Isn't broadcast in either one or the other?

      FYI I now have Tivo set to "Native" since my TV supports all signals. Is it really desirable to upconvert everything to 1080i? I can certainly give it a try, but I don't think that gets at the heart of the matter.

      Roger

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      • #4
        You can have a show in 1080i and then a commercial, for example, can be 720p. I'd try switching to fixed to see if it solves the problem.

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        • #5
          I'll give it a try later - I understand what you are saying - but I was definitely seeing the same programming (the main program, not a commercial) switching from 1080i to 720p and vice-versa.

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          • #6
            Also, I think in situations like this, Native versus Hybrid may matter, although it's been so long since I screwed with these that I forget what each should result in.
            Been here a long time . . .

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