FAQFAQ   SearchSearch   MemberlistMemberlist   GalleryPhoto Gallery   RegisterRegister   ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

newbie question, native res is not actually 720p

Post new topic   Reply to topic    123Macmini.com - Forums Forum Index -> Mac Mini HTPC
View previous topic :: View next topic  
Author Message
New Member
New Member

Joined: 25 Jun 2011
Posts: 1

PostPosted: Sat Jun 25, 2011 9:51 am    Post subject: newbie question, native res is not actually 720p Reply with quote

might be overthinking this

- my source material is like 60/40 720p vs standard def
- my budget / typical viewing distance / capacity of the human eye stuff that i've read has led me to believe a 720p native resolution tv is sufficient for me
- will be hooked into a late 2009 mac mini, currently running a 1920 x 1200 computer display without issue

so what is up with native resolutions on tvs? take for example this "720p" samsung tv:

says it's native res is 1,024 x 768, 16:9 aspect ratio. in USA math i learned that would be a 4:3 aspect ratio. so i read around and find that even though 720p is actually 1280 x 720, the tv has rectangular pixels to make it 16:9

btw newegg has the native res listed as 1280 x 720, and amazon as 1366 x 768, which isn't helping the situation

so is this going to cause problems when i hook everything up? will i have to go through all this Switch ResX nonsense? should i look for a native res that is actually 720p with square pixels? i'm basically wanting the same no fuss experience of the computer display just on a bigger screen.

Back to top
View user's profile Send private message
Veteran Member
Veteran Member

Joined: 09 Nov 2008
Posts: 3282
Location: Seattle

PostPosted: Sat Jun 25, 2011 4:38 pm    Post subject: Reply with quote

There is more than one kind of aspect ratio. If I recall correctly there are three, but I can only think of Display Aspect Ratio, and Pixel Aspect Ratio.

That display that you listed most likely is 1024 by 768. This is typical of Plasma displays. So the display stretches the pixels, just like how a DVD player stretches the pixels on an anamorphic DVD.

What the panel displays is considered 1280 by 720 because of scalers built in to the display. Most consumers would be confused if they were told it was a 768p display, so the scaler scales the image to a lower resolution while it spreads the pixels.

I've heard, but not recently, that OS X doesn't like PARs that aren't 1:1 so widescreen 1024 by 768 displays look exactly like a 1024 by 768 display would look.

I'm not sure SRX can deal with odd PARs either.


ps - I would never use Amazon as a source of technical information.
Grumpy old man of computing.

[Desktop] Intel mini - Intel i5 mini - 2.33Ghz 8GB 500GB HDD / 120GB SSD 10.10

4 x Hitachi 2TB HDD in a qBOX-SF - 10.7.5 (Thanks Phil!)

Make sure it has pins!
Back to top
View user's profile Send private message Visit poster's website

Joined: 05 Feb 2010
Posts: 148
Location: Somewhere in Florida

PostPosted: Sun Jun 26, 2011 9:54 am    Post subject: Reply with quote

I had an older Samsung, 720p. The native resolution for PC connection was 1366 X 768 (VGA). Connected this way (I have the same mini), picture was perfect, no overscan etc. Through HDMI (with a converter) some calibration was required (I use Plex for movies, etc.). My advice, go with the native connection; there's virtually no difference between 1080p and 720p on sets smaller than 40", and I saw no difference between VGA and HDMI. Hope this helps.
Mac Pro 4,1 12GB ram
Samsung SSD 120GB boot, Intel SSD 80GB scratch, 10TB internal ZFS
Sans Digital 6TB Raid5, 2TB Raid0
NT Guardian Maximus 1TB Raid1, 500GB Raid0
OWC external Superdrive
An iPod for every occasion
iPhone 3g
Back to top
View user's profile Send private message
Junior Member
Junior Member

Joined: 28 Jun 2009
Posts: 28

PostPosted: Sat Jul 16, 2011 10:33 am    Post subject: Reply with quote

As long as you have more pixels than the 1080 specification requires then you are fine. There are probably engineering or manufacturing reasons for these other formats. One other thing to take into account is that HDTVs are essentially flat screen displays with a built in computer - check the manual and you may just find your TV running Linux, though not in a form intended for you to hack it.
Back to top
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic    123Macmini.com - Forums Forum Index -> Mac Mini HTPC All times are GMT - 5 Hours
Page 1 of 1

Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum

Shop Amazon:  Mac Mini  |  iMac  |   Mac Pro  |  MacBook Air   |  MacBook Pro   |  AirPort Extreme   |  Time Capsule

123Macmini.com is an independent publication and has not been authorized, sponsored, or approved by Apple Computer, Inc.
All logos and trademarks in this site are property of their respective owners.
Copyright © 123Macmini.com. All Rights Reserved.