Attend XDA's Second Annual Developer Conference, XDA:DevCon 2014!
5,769,951 Members 52,846 Now Online
XDA Developers Android and Mobile Development Forum

Fyi - output to Samsung wireless HDMI device doesn't scale to 16x9

Tip us?
 
Buji
Old
#1  
Member - OP
Thanks Meter 6
Posts: 99
Join Date: Jan 2007
Default Fyi - output to Samsung wireless HDMI device doesn't scale to 16x9

I get sidebars on the 1080p output setting. I don't think the wireless dongle supports any higher resolution, and I don't have a 4k display to test, even if it did.

Sent from my SM-P900 using Tapatalk
 
dt33
Old
#2  
Senior Member
Thanks Meter 43
Posts: 281
Join Date: Apr 2010
Change on yours TV to fit and not 16:9 mode.
 
jake21
Old
#3  
Senior Member
Thanks Meter 11
Posts: 338
Join Date: Apr 2011
What is a samsung wireless hdmi device ? Do you mean dlna ?


Quote:
Originally Posted by Buji View Post
I get sidebars on the 1080p output setting. I don't think the wireless dongle supports any higher resolution, and I don't have a 4k display to test, even if it did.

Sent from my SM-P900 using Tapatalk
 
Buji
Old
#4  
Member - OP
Thanks Meter 6
Posts: 99
Join Date: Jan 2007
Quote:
Originally Posted by jake21 View Post
What is a samsung wireless hdmi device ? Do you mean dlna ?
Samsung makes a wireless HDMI device for their newer devices. It is a miracast reciever, they call it an allshare adapter.

http://www.google.com/aclk?sa=L&ai=C...26adtype%3Dpla


Sent from my SM-P900 using Tapatalk
 
Buji
Old
#5  
Member - OP
Thanks Meter 6
Posts: 99
Join Date: Jan 2007
Quote:
Originally Posted by dt33 View Post
Change on yours TV to fit and not 16:9 mode.
Yeah, the problem isn't the TV's scaling, it is adding blank information to the sides at the device level. The allshare adapter handshakes with a full 1080p signal that fills the 1:1 pixel mapping mode of my (Samsung) tv perfectly. My galaxy s4 through the same adapter sends along a properly formatted signal.

Since the native 2560x1600 resolution breaks down to a 16x10 ratio instead of the standard 1080p standard of 16x9, it can either add the bars, rescale the image [introducing a subtle geometric squash) or zoom the image and chop the top and bottom of the signal. Since zooming the image would result is lost information, and rescaling is pretty processor intensive I can see why they chose the route to add the sidebars.

My Samsung tv, which is only a few years old, doesn't have a zoom mode that doesn't also cut off some of the picture image, and since the black bars are part of the 1080p signal, it is technically displaying the picture correctly.

Sent from my SM-P900 using Tapatalk
 
dt33
Old
#6  
Senior Member
Thanks Meter 43
Posts: 281
Join Date: Apr 2010
Quote:
Originally Posted by Buji View Post
Yeah, the problem isn't the TV's scaling, it is adding blank information to the sides at the device level. The allshare adapter handshakes with a full 1080p signal that fills the 1:1 pixel mapping mode of my (Samsung) tv perfectly. My galaxy s4 through the same adapter sends along a properly formatted signal.

Since the native 2560x1600 resolution breaks down to a 16x10 ratio instead of the standard 1080p standard of 16x9, it can either add the bars, rescale the image [introducing a subtle geometric squash) or zoom the image and chop the top and bottom of the signal. Since zooming the image would result is lost information, and rescaling is pretty processor intensive I can see why they chose the route to add the sidebars.

My Samsung tv, which is only a few years old, doesn't have a zoom mode that doesn't also cut off some of the picture image, and since the black bars are part of the 1080p signal, it is technically displaying the picture correctly.
Sent from my SM-P900 using Tapatalk
You are correct, mine WiFi dongle arrived yesterday and I also got black borders when using screen mirroring and it works fine with MHL 2.0 adapter. So no idea why its black borders with WiFi.
 
Buji
Old
#7  
Member - OP
Thanks Meter 6
Posts: 99
Join Date: Jan 2007
The 2012 note 10.1 did the same thing. Good to know the MHL adapter works, mine is broken and I haven't replaced it yet.

Sent from my SM-P900 using Tapatalk
 
BarryH_GEG
Old
#8  
BarryH_GEG's Avatar
Senior Member
Thanks Meter 4145
Posts: 8,646
Join Date: Jan 2009
Location: Spokane, Washington
Quote:
Originally Posted by Buji View Post
I get sidebars on the 1080p output setting. I don't think the wireless dongle supports any higher resolution, and I don't have a 4k display to test, even if it did.
Outputting from my N10.1-14 (same screen resolution as the N12) to a '13 Samsung SmartTV via AllShare Cast...

1080P MKV file...



720P Google Play Movie...



Plain old screen mirroring...

The Following User Says Thank You to BarryH_GEG For This Useful Post: [ Click to Expand ]
 
Buji
Old
#9  
Member - OP
Thanks Meter 6
Posts: 99
Join Date: Jan 2007
It's a little tough to see, but it looks like the 10.1 2014 does NOT have this problem? That is interesting!

Sent from my SM-P900 using Tapatalk

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes


Android App Review: Hide Your Files with Androignito – XDA Developer TV

Stop right now, look at your phone, and see how many pictures, … more

BrightNotes Makes Cloud Notes Simple and Easy

There are literally thousands of note taking apps available on Android, with practically every … more

Google Glass XE20.1 Update Brings Improved Contacts, Head Nudge, New Cards and Commands

Ever since Google unveiled Android Wear earlier this … more

Remote Control Your Android Device with Monitordroid

The Android OS showsgreat potential in many areas. One of most interesting things that … more