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What Do I Set My Cable Box To 720p Or 1080i

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Old 10-17-2005, 10:39 PM   #1
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Default What Do I Set My Cable Box To 720p Or 1080i

Hi,i Need Some Help When I Am Watching A Tv Show In 720p Or 1080i Do I Need To Change My Cable Box And How Do You Know If The Show Or Movie You Are Watching Is 720p Or 1080i.i Just Leave My Box Set At 1080i If I Leave My Box Set To 1080i And A Show Is 720p Should I See A Difference If I Change The Box To 720p.also How Do You Know What Stations Are 720p Or 1080i.my Tv Only Lets Me Pick 1080i When I Watch Hd Shows.thank You
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Old 10-18-2005, 06:28 AM   #2
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take a breath

theoretically the best bet is to have your cable box pass thru whatever signal is coming thru and let your tv do conversion if it is needed. realistically, i can't tell a difference with my cable box set to 720, 1080, or pass thru.
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Old 10-18-2005, 06:48 AM   #3
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you should feed your TV its native resolution. you did not state your make and model of TV, but if it's CRT than most likely it's 1080i, otherwise set the box to 720p and let the TV do the conversions.........
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Old 10-18-2005, 07:58 AM   #4
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I think you should experiment with the different settings. It has been noted that some cable/dish receivers don't work properly in some modes. My Dish 811 receiver has be set to output at 1080i, even though my DLP is a 720p. If I run my receiver at any other mode, it looks really bad. (could be a result of HDMI/DVI)
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Old 10-18-2005, 05:28 PM   #5
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Thank You For The Answers.
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Old 10-18-2005, 11:31 PM   #6
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Default 720P vs 1080i

I just got back from the dealer who sold me my TV (Samsung HL-R6168) and here is what he told me.

You should always use 720P in place of 1080i. His logic was that if you use 1080i you only get 540 lines of resolution. If you use 720P you are getting 720 lines of resolution.

Can someone enlighten me on how this works.

Thanks in advance!
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Old 10-20-2005, 12:33 AM   #7
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With your 1080p/60 display, you should pass thru both modes for upconversion in the TV, if possible... keep them as they're sent. 1080i/30 will be deinterlaced and frame doubled for display, 720p/30 is simply upscaled. Multi-conversion compromises PQ.
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Old 10-20-2005, 07:16 AM   #8
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Quote:
Originally Posted by Cheech91060
take a breath

theoretically the best bet is to have your cable box pass thru whatever signal is coming thru and let your tv do conversion if it is needed. realistically, i can't tell a difference with my cable box set to 720, 1080, or pass thru.
The picture is 100% better with my Sat box (Dish 811) set to 1080, not 720p (which is the closest to my displays native res.).
So I believe something else is at work here. My experience mimics suomi's. But I don't believe it's the DVI/HDMI adaptor, as I get the same results using components output from the box.

With my HDMI output DVD player, 720 is definitely better, which would be expected. YMMV.
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Last edited by daleb; 10-20-2005 at 07:19 AM.
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Old 10-20-2005, 08:08 AM   #9
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My experimentation with Adelphia Digital Cable into an SA-8300HD and Panasonic RP-LCD has led me to fix the output of my converter to 720P and let the SA box do the conversion. This resulted in no discernable change in HD picture quality (from pass-thru mode) and significantly better overall SD quality.

Your components are no doubt different than mine, so I'd experiment to find what looks best to you. I'd suspect you will find the most difference looking at SD content.
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Old 10-22-2005, 08:50 PM   #10
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Quote:
Originally Posted by GISMO
Hi,i Need Some Help When I Am Watching A Tv Show In 720p Or 1080i Do I Need To Change My Cable Box And How Do You Know If The Show Or Movie You Are Watching Is 720p Or 1080i.i Just Leave My Box Set At 1080i If I Leave My Box Set To 1080i And A Show Is 720p Should I See A Difference If I Change The Box To 720p.also How Do You Know What Stations Are 720p Or 1080i.my Tv Only Lets Me Pick 1080i When I Watch Hd Shows.thank You
Why dont you let your eyes be the judge, try both modes and see which one looks better to you?
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