Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.




34 posts

Geek


Topic # 57178 4-Feb-2010 20:35
Send private message

Hey,

So I got a media center with a 8800GTX (no im not changing the card any time soon) and it does all my freeview tuning etc.

I want to buy a new LCD HDTV in the 37 to 42 inch range.

My budget is basically $1500 max maybe stretched to 1700 if its _REALLY_ REALLY worth it.

Now I know I want 1920x1080 but I was told about pixel mapping where as if the LCD doesnt do 1:1 pixel mapping you will get the edges of the screen chopped off..

Nobody in the shops advertise anything about pixel mapping and I have a real hard time trying to find any info on manufactuers sites as well.

Do I really need 1:1 pixel mapping or is there a workaround? and if I do what TV's actually have it? most of them these days or will I have to really look around?

Will be using HDMI as well and one salesman said if it has HDMI you dont need pixel mapping it will always fully fit :\ is that right?

thanks

Create new topic
291 posts

Ultimate Geek


  Reply # 296190 4-Feb-2010 20:53
Send private message

Do I really need 1:1 pixel mapping or is there a workaround? and if I do what TV's actually have it? most of them these days or will I have to really look around?

Will be using HDMI as well and one salesman said if it has HDMI you dont need pixel mapping it will always fully fit :\ is that right?

thanks


On the Samsung LA40B530 ($1500), using ATI4670 over HDMI, filling the screen (which may be 1:1 pixel mapping, but I'm not totally sure) is accomplished by setting 1920x1080 res, overscan to 0% and setting the TV from 16:9 mode to "Screen fit" mode.

On this TV, over HDMI you certainly can get both black bars around the image (ATI overscan not 0%) or a chopped off desktop (16:9 mode on the tv).




HTPC: Antec Fusion 430, Gigabyte GA-MA78GPM-UD2H F7, AMD X2 4850e, Sapphire 4670 1GB, Corsair 4x1Gb,  Adata 128Gb SSD, WD10EARS Green, LG GGC-H20L Blu-ray, Hauppauge NOVA TD-500, Logitech z-5500, Logitech Harmony 525, Samsung LA40B530 1080p, Vista Premium-32 SP2, Catalyst 10.12(Facelift preview), Mediaportal 1.2.3+OneButtonMusic, AC3Filter, Cyberlink Powercinema 6 codec, BLU-RAY: Samsung BD-F7500

26343 posts

Uber Geek
+1 received by user: 5918

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 296191 4-Feb-2010 21:02
Send private message

1:1 pixel mapping isn't really a big issue these days. A few years ago it was a big problem particularly with TV's that were 1024x768 and 1280/1366x768.

Now most TV's that do 1920x1080 over HDMI will give you 1:1 pixel mapping at 60Hz

 
 
 
 


Try Wrike: fast, easy, and efficient project collaboration software
291 posts

Ultimate Geek


  Reply # 296196 4-Feb-2010 21:13
Send private message

Now most TV's that do 1920x1080 over HDMI will give you 1:1 pixel mapping at 60Hz


Is this a special feature of 60Hz? I run 50Hz for PAL TV.




HTPC: Antec Fusion 430, Gigabyte GA-MA78GPM-UD2H F7, AMD X2 4850e, Sapphire 4670 1GB, Corsair 4x1Gb,  Adata 128Gb SSD, WD10EARS Green, LG GGC-H20L Blu-ray, Hauppauge NOVA TD-500, Logitech z-5500, Logitech Harmony 525, Samsung LA40B530 1080p, Vista Premium-32 SP2, Catalyst 10.12(Facelift preview), Mediaportal 1.2.3+OneButtonMusic, AC3Filter, Cyberlink Powercinema 6 codec, BLU-RAY: Samsung BD-F7500

228 posts

Master Geek
+1 received by user: 15


  Reply # 296216 4-Feb-2010 21:47
Send private message

You usually find that most displays that do 1:1 pixel mapping are not set that way by default, usually you have to maually set the display and likewise a PC to send correct matching scaling.

The concept for overscan in the first place is to hide edge artifacts, typically ranging from 5%~15%.
The effect can result in a scaled image even if you send 1920*1080, ie the image is 15% overscaned from the source.

It is an important setting to have, especially for a 1080 display system.




Masterpiece Calibration Ltd, isf certified

 

www.mastercal.co.nz

 

 

"I'm not a robot!"



34 posts

Geek


  Reply # 296221 4-Feb-2010 21:54
Send private message

do you guys think this one will do the trick?

http://www.dse.co.nz/dse.shop/...

3267 posts

Uber Geek
+1 received by user: 77

Trusted

  Reply # 296283 5-Feb-2010 06:14
Send private message

Give the DSE stock number, links do not work as it is valid for only your session.




You can never have enough Volvos!


26343 posts

Uber Geek
+1 received by user: 5918

Moderator
Trusted
Biddle Corp
Lifetime subscriber

  Reply # 296284 5-Feb-2010 06:48
Send private message

dale77:
Now most TV's that do 1920x1080 over HDMI will give you 1:1 pixel mapping at 60Hz


Is this a special feature of 60Hz? I run 50Hz for PAL TV.


A few older Samsung's I've played with wouldn't do 1:1 pixel mapping at 50Hz over HDMI. This would explain why you had to mess with things.

50Hz should be used for PAL video content to avoid any tearing.




34 posts

Geek


  Reply # 296309 5-Feb-2010 08:45
Send private message

Hey sorry about that the DSE stock code is GE6446

2584 posts

Uber Geek
+1 received by user: 5

Mod Emeritus
Trusted
Lifetime subscriber

  Reply # 296362 5-Feb-2010 11:31
Send private message

I would certainly make sure that it does 1:1 pixel mapping. I brought a Sony 46" 1080p TV last year and by default pixel mapping was not turned on and the picture had overscan breaking 1:1 pixel mapping. This is via HDMI so the sales man's advice that it will always fit ie use 1:1 is NOT correct.
The problem you have is that manufactures call pixel mapping different things so it can be hard to confirm. Best to look at the manuals for the TV's you are looking at. If you can get them in electronic form (you can for most) just search for 1:1.







Media centre PC - Case Silverstone LC16M with 2 X 80mm AcoustiFan DustPROOF, MOBO Gigabyte MA785GT-UD3H, CPU AMD X2 240 under volted, RAM 4 Gig DDR3 1033, HDD 120Gig System/512Gig data, Tuners 2 X Hauppauge HVR-3000, 1 X HVR-2200, Video Palit GT 220, Sound Realtek 886A HD (onboard), Optical LiteOn DH-401S Blue-ray using TotalMedia Theatre Power Corsair VX Series, 450W ATX PSU OS Windows 7 x64

722 posts

Ultimate Geek


  Reply # 297708 10-Feb-2010 16:28
Send private message

Also, some LCDTVs don't do pixel mapping on all HDMI outputs. I got caught out when I bought my Samsung. It will do 1:1 on HDMI 2 only. In the maual's fine print.




Silverstone LC14 HTPC Case/Intel E4600 CPU/GA-EP35-DS3 MOBO/Asus EN9500GT graphics/2GB RAM/total 2TB HDD space/HVR-2200 & 2X 150MCE tuner cards/LG GGC-H20L BD Drive/MCE2005/Mediaportal/TVServer 1.1.0Final/LG 55"3D LED-TV/Denon AVR-1803 receiver/X1 projector

Create new topic



Twitter »

Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Exhibition to showcase digital artwork from across the globe
Posted 23-May-2018 16:44


Auckland tops list of most vulnerable cities in a zombie apocalypse
Posted 23-May-2018 12:52


ASB first bank in New Zealand to step out with Garmin Pay
Posted 23-May-2018 00:10


Umbrellar becomes Microsoft Cloud Solution Provider
Posted 22-May-2018 15:43


Three New Zealand projects shortlisted in IDC Asia Pacific Smart Cities Awards
Posted 22-May-2018 15:14


UpStarters - the New Zealand tech and innovation story
Posted 21-May-2018 09:55


Lightbox updates platform with new streaming options
Posted 17-May-2018 13:09


Norton Core router launches with high-performance, IoT security in New Zealand
Posted 16-May-2018 02:00


D-Link ANZ launches new 4G LTE Dual SIM M2M VPN Router
Posted 15-May-2018 19:30


New Panasonic LUMIX FT7 ideal for outdoor: waterproof, dustproof
Posted 15-May-2018 19:17


Ryanair Goes All-In on AWS
Posted 15-May-2018 19:14


Te Papa and EQC Minecraft Mod shakes up earthquake education
Posted 15-May-2018 19:12


Framing Facebook: It’s not about technology
Posted 14-May-2018 16:02


Vocus works with NZ Police and telcos to stop scam calls
Posted 12-May-2018 11:12


Vista Group signs Aeon Entertainment, largest cinema chain in Japan
Posted 11-May-2018 21:41



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.