Full HD (1080p) - 1920 x 1080
HD (720p) - _1280_ x 720
X20 - _1024_ x 768

Faktas, kad norint 1280 tasku atvaizduoti/paversti i 1024, bus prarandama 
 >20% informacijos.
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Sakau, kad X20 prasčiau rodo nei S20 :)

Matai Fla, yra dar ir išimtys su tuo HDready/HDTV sertifikavimu:
http://www.digitaleurope.org/index.php?id=32&id_article=50
http://www.digitaleurope.org/web/news/telecharger.php?iddoc=246

Čia pusę nesuprantu (nesigilinau), bet užstrigo, kas pačioje pabaigoje 
parašyta.

"Q: In reviewing Annex B of the licensing agreement, it appears that the 
screen size should be
within +/- 5% of a 16:9 standard screen ratio. How does EICTA consider the 
15:9 format ? This
format is at -6.25% away from 16:9.
A: With reference to resolution, the core of the "HD ready" minimum 
requirements is: minimum
720 physical lines in wide aspect ratio (i.e. lines used to display a wide 
aspect ratio image).
The "HD ready" minimum requirements are applicable to any display device 
type, and within that
broad context the words "aspect ratio" in the agreement refer to the 
"picture aspect ratio" (i.e. the
displayable image based on the video frame), not directly as such to the 
physical screen aspect ratio
of a (fixed resolution) display device.
The +/- 5% allows for some flexibility for the picture aspect ratio (and 
hence indirectly the physical
screen aspect ratio).
AR is Picture Aspect Ratio
AR = Horizontal_Picture_Size / Vertical_Picture_Size
AR = 16:9 [± 5%]
AR = 1.78 [± 5%]
1.6889 < AR < 1.8667
This entails that display devices with a physical screen aspect ratio 
smaller than 1.6889 can comply
only on the condition that the device has enough lines to still be using at 
least 720 lines when
displaying an image in wide picture aspect ratio. Practically this would 
mean that the display device
would be showing a “wide aspect ratio letterbox"-style overall image, with 
720 lines used in
between the (black) top/bottom bars.
Note also that likewise devices with a physical screen aspect ratio larger 
than 1.8667 would be
using a “wide aspect ratio pillar box” -style operating mode.
Display devices with a 15:9 screen that have exactly 720 lines - and not 
more - cannot comply with
the “HD ready” minimum requirements.
In reality many 15:9 display devices are actually (W)XGA -grade (i.e. 768 
lines) screens, and can
comply with the resolution criterion in as far as they feature a compliant 
"wide aspect ratio
letterbox" operating mode."