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>>> Overscan, make it stop! :( <<<

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chriscic is offline Old Post 06-04-2004 08:22 PM
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chriscic
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quote:
Originally posted by Cheezmo
The overscan on the HS10 projector is adjustable in the service menu. You should be able to find a local ISF calibrator that could help you out or if you are comfortable making that kind of adjustment yourself you can probably find the info you need on one of the home theater enthusiast WWW sites.


Thanks for the thought. I'm usually pretty good at googling/otherwise finding solutions on the 'net but am coming up empty on this one. In fact, someone on AVS specifically said you canít do this. Are you sure you can? Could you please point me in the right direction?

Thanks,
-Chris

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Cheezmo is offline Old Post 06-04-2004 08:38 PM
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Cheezmo
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Registered: Apr 2004
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You might try here...

http://www.agoraquest.com/viewforum.php?forum=59

Just be careful if you start messing around in the service mode. You can mess things up if you aren't careful. Read all you can and make sure you understand what you are doing. (Or better yet, hire a professional who does know what they are doing!)

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chriscic is offline Old Post 06-06-2004 09:10 PM
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chriscic
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Thanks for the suggested site, but nothing on adjusting HS10 overscan via DVI there.

If you can do this I would have thought it'd be a heck of a lot easier to find the info.

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Cheezmo is offline Old Post 06-06-2004 09:18 PM
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Cheezmo
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I may have been confused by some XXHS10 documentation I was looking at (the RPTV's).

If the service menu for your projector doesn't have any height/width adjustments, then you are probably correct that there is nothing you can do. Sorry for leading you down the wrong path.

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Lije Baley is offline Old Post 06-06-2004 11:16 PM
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Lije Baley
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Steve--

Thanks for your formula correcting the hd.net overscan screen. I was able to set my Mits RP set to about 5% all around.

Did hd.net acknowledge any of your observations regarding their miscalculations?

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chriscic is offline Old Post 06-07-2004 03:42 AM
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chriscic
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quote:
Originally posted by Cheezmo
I may have been confused by some XXHS10 documentation I was looking at (the RPTV's).

If the service menu for your projector doesn't have any height/width adjustments, then you are probably correct that there is nothing you can do. Sorry for leading you down the wrong path.



Thanks for trying : ) I went into service mode and ran through pretty much all the options and nothing impacted the overscan.

Still baffling to me as to why I have to live with significant overscan give the all-digital path.

-Chris

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litzdog911 is offline Old Post 06-07-2004 10:46 AM
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litzdog911
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quote:
Originally posted by Lije Baley
Steve--

Thanks for your formula correcting the hd.net overscan screen. I was able to set my Mits RP set to about 5% all around.

Did hd.net acknowledge any of your observations regarding their miscalculations?



I was also wondering what HDNET had to say about this. And does the fact that HDNET's test pattern shows 10% horizontal overscan when it's actually closer to 5% mean that HDNET's broadcasts really have more overscan than other HD broadcasts? Or is this just an anomoly with the test pattern?

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Cheezmo is offline Old Post 06-07-2004 11:05 AM
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Cheezmo
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I posted their response on my analysis page.

Basically, they acknowledged that it did not represent overscan percentages and promised to redo it (no time frame, however).

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Larry Hutchinson is offline Old Post 06-08-2004 01:48 AM
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Larry Hutchinson
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FWIW, here is a capture I made of the HDNet test pattern. For some reason it is 1920x1088 rather than the expected 1080. I think the bottom 8 lines are extra.

http://home.comcast.net/~larryh791/...overscan001.jpg

Don't know if the original transport stream came from DirecTV or from Dish but it was captured using the "new technology" described in the recorders forum on AVS.

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Cheezmo is offline Old Post 06-08-2004 08:57 AM
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Cheezmo
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Registered: Apr 2004
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Here is an explanation I found that sounds plausible...

"Actual broadcast images are encoded as 1920◊1088 pixels because MPEG-2 encoding requires the number of vertical lines to be a multiple of 16."

http://www.fourmilab.ch/documents/howmanydots/

Presumably the bottom 8 pixels are to be cropped but I don't know if there is a standard for that.

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aaronwt is offline Old Post 06-08-2004 09:13 PM
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aaronwt
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I know with my HD-TiVo it shows 10% overscan all around. When I had the Samsung 360 it was less than that and the DST3000 was even less. When it was ISF calibrated it was set for 5% for a 1080i input. From my results it's definitely the HD-TiVo that not showing enough of the picture. I can freeze an OTA sinal and compare it with the output of my HiPix card, and the picture from the HiPix card shows more than the HD-TiVo.

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>>> Overscan, make it stop! :( <<<

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