[opendtv] Re: Overscanning on LCD TVs

I make no pretence of being 'expert' in this subject.  I do have the same 
complaint with my Samsung DLP 56" RP display (720p) bought circa 2002-2003.  
The display loses at least 3" of display at each edge.  My sources can be OTA 
or satellite receiver output with the same overscan attributable to the display 
monitor itself.  Of late the overscan is decidedly annoying on some programming 
where text overlays are 'chopped'.

I did notice that when in a showroom (a year or two after buying) watching side 
by side the same program on different TV makes.  Some did display a normal scan 
while others had noticeable overscan.

It leaves me to wonder whether overscan was intentional by the designers of 
early TV digital displays to avoid some potential display problems.
  ----- Original Message ----- 
  From: dan.grimes@xxxxxxxx 
  To: opendtv@xxxxxxxxxxxxx 
  Sent: Thursday, November 05, 2009 12:36 PM
  Subject: [opendtv] Overscanning on LCD TVs


  We have a large amount of consumer grade Sony Bravia televisions in our 
facility.  It appears that all of them overscan the picture, despite setting 
"overscan" to normal in the menu.  Adjusting overscan to 1 or 2 makes it even 
worse.  The only sources I have been able to confirm are on the HDMI inputs and 
often using HD-SDI to HDMI converters but I have also seen it with DVI sources. 
 I plan to test with BD as well. 

  So my question is, is overscanning typical with consumer TVs?  I thought that 
it that current LCD TV's used all 1920x1080 pixels. 

  I should also probably note that most of the signals are 720P. 

  Because of a deal with Sony, I don't have too many other display 
manufacturers to test up against, thus the question to the display experts 
here. 

  Dan Grimes

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