Hdnet Test Pattern Over Scan Readings

3338 Views 31 Replies 15 Participants Last post by cartrivision, Sep 2, 2008

pfueri

Discussion Starter · Aug 12, 2008

When it shows the overscan part of the test it says that a 2 or a 3 on the sides and at the top and bottom are proper overscan numbers.I have ran the test on my sony 60 xbr 2 and my samsung 42 plasma and the both have the same over scan readings.At the top I get a 4 at the bottom I get a 6 and onthe sides I get a 8. Is that normal?From what it says on the test that HDNET don't overscan there picture.And they say a 2 or a 3 is a proper reading.Then why does Directv overscan.I have seen some of the words cut off on the bottome of my screen on the science channel and history channel like it was over scaned.Is ther anyone else with the same thing I'm seeing?

1 - 20 of 32 Posts

davring

· #2 · Aug 12, 2008

My Sony is almost spot on, but my Sammy is a little off center, very close though. There was a thread here a while back and the general consensus was that D* does not broadcast an over scan picture.

pfueri

Discussion Starter · #3 · Aug 12, 2008

Thanks for the reply .Are you saying that my readings are wrong or are the the same as you.

litzdog911

· #4 · Aug 12, 2008

Also check out the "HD Net Test Pattern" thread here ....
http://www.dbstalk.com/showthread.php?t=74738

Somewhere there's a link for more information about how to interpret these patterns.

veryoldschool

· #5 · Aug 12, 2008

DirecTV does not over scan.
With your Sony, there is a setting for Zero over scan [only with a 1080 signal].
What you're seeing on those channels is the broadcaster trying to modify a 4:3 original program to 16:9. TNT does the [poor] stretch-o-vision.

machavez00

· #6 · Aug 12, 2008

My HL-R4667W 46" Sammy, and yes I can read the last few lines.

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pfueri

Discussion Starter · #7 · Aug 12, 2008

machavez00 said:
My HL-R4667W 46" Sammy, and yes I can read all the lines.

Your screen has the same readings as mine.The four circles in each corner are cut off.Is this normal?

veryoldschool

· #8 · Aug 12, 2008

pfueri said:
Your screen has the same readings as mine.The four circles in each corner are cut off.Is this normal?

That is the "normal" 3-5% overscan.
With zero overscan, you'll see the closed captioning data "noise" at the top of the screen.

Lee L

· #9 · Aug 12, 2008

WHen I set my Panansonic Plasma to zero overscan, I can see the very edge of each circle as well as all teh lines on teh side. For many Plasma and lcd sets, you can do this also (and you probably should as mine definitely looks clearer when overscan is set to 0 as it is not scaling). However, many RPTV sets will not go below 5% without tweaking.

pfueri

Discussion Starter · #10 · Aug 12, 2008

Lee L said:
WHen I set my Panansonic Plasma to zero overscan, I can see the very edge of each circle as well as all teh lines on teh side. For many Plasma and lcd sets, you can do this also (and you probably should as mine definitely looks clearer when overscan is set to 0 as it is not scaling). However, many RPTV sets will not go below 5% without tweaking.

I can't find a overscan adjustment on my samsung 42 plasma. but on my sony it is set to 0 and it still cuts the circles off just like the screen shot is.

veryoldschool

· #11 · Aug 12, 2008

pfueri said:
I can't find a overscan adjustment on my samsung 42 plasma. but on my sony it is set to 0 and it still cuts the circles off just like the screen shot is.

Most overscan adjustemnts are in the service menu, and not the user menu.

With my Sony Bravia XBR2 [LCD] zero over scan is in the user's menu and does give me zero.
Sometime back when this first came up, it was new and I had problems with the test pattern. Sony Tech came out and went into the service menu. Though he claimed he didn't do anything [which looked like he didn't as I watched], when he came back out of it, I had zero over scan.

Here is what the test pattern is on my Sony: http://www.dbstalk.com/attachment.php?attachmentid=8381&d=1180552338

MIMOTech

· #12 · Aug 12, 2008

My HLT-6187S DLP is set to just Scan and centered with this pattern. This gives me just a little bit more Overscan then HDnet and much less then the pictures shown above. I can see the edges of the circle.

veryoldschool

· #13 · Aug 12, 2008

MIMOTech said:
My HLT-6187S DLP is set to just Scan and centered with this pattern. This gives me just a little bit more Overscan then HDnet and much less then the pictures shown above. I can see the edges of the circle.

By "above" you're not meaning the link in my post [since it is zero overscan].

machavez00

· #14 · Aug 12, 2008

The LED powered DLP's have less overscan than the bulb powered units.

From the AVS Forum Samsung LED DLP thread: http://www.avsforum.com/avs-vb/showthread.php?t=827799&page=289

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pfueri

Discussion Starter · #15 · Aug 12, 2008

veryoldschool said:
Most overscan adjustemnts are in the service menu, and not the user menu.

With my Sony Bravia XBR2 [LCD] zero over scan is in the user's menu and does give me zero.
Sometime back when this first came up, it was new and I had problems with the test pattern. Sony Tech came out and went into the service menu. Though he claimed he didn't do anything [which looked like he didn't as I watched], when he came back out of it, I had zero over scan.

Here is what the test pattern is on my Sony: http://www.dbstalk.com/attachment.php?attachmentid=8381&d=1180552338

How did he get to the service menu I have a sony sxrd 60xbr2 .we might have close to the same software.

pfueri

Discussion Starter · #16 · Aug 12, 2008

veryoldschool said:
That is the "normal" 3-5% overscan.
With zero overscan, you'll see the closed captioning data "noise" at the top of the screen.

You said that this was normal.The above screen shots.But you posted a screen shot of yours and it showed the entire test screen.So what is normal ?What do I have to do to get zero over scan and why is the over scan the same on my sony and samsung>

cartrivision

· #17 · Aug 12, 2008

pfueri said:
I can't find a overscan adjustment on my samsung 42 plasma. but on my sony it is set to 0 and it still cuts the circles off just like the screen shot is.

On my Samsung LCD, it's selected via the display mode.... "16:9" mode = overscan, and "Just Scan" mode = 16:9 with no overscan.

veryoldschool

· #18 · Aug 12, 2008

pfueri said:
How did he get to the service menu I have a sony sxrd 60xbr2 .we might have close to the same software.

I shouldn't do this, because somebody will screw up their TV by mistake.
BE VERY CAREFUL WHILE IN THE SERVICE MENU!!!!!!!

http://www.bruzziforum.com/vbf/forumdisplay.php?f=5

veryoldschool

· #19 · Aug 12, 2008

pfueri said:
You said that this was normal.The above screen shots.But you posted a screen shot of yours and it showed the entire test screen.So what is normal ?What do I have to do to get zero over scan and why is the over scan the same on my sony and samsung>

Normal is slightly less than the zero overscan that I posted.
I can't find my "normal" test pattern photo, as this came from well over a year ago's work.
If you really need what it looks like or the "hash marks", then I'll run the test pattern and either post the marks or take another photo with "normal" overscan.

The "main point" was to show that DirecTV doesn't overscan, and show it.

bonscott87

· #20 · Aug 12, 2008

pfueri said:
You said that this was normal.The above screen shots.But you posted a screen shot of yours and it showed the entire test screen.So what is normal ?What do I have to do to get zero over scan and why is the over scan the same on my sony and samsung>

Every TV made is different in their overscan and 3-5% is what most typcially aim for. 0 overscan is actually not normal and as mentioned can introduce noise on the sides. A little overscan is good.

The overscan on my Hitachi isn't the greatest. It's 5 left, 5 top, 8 left and 4 bottom or something screwy like that. I can't get into the service menu easily to adjust and I could brick my TV if I tried. 6 years later I still have that TV and it's fine. It's just something I don't worry about.

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