Go Back   Computer Forums > General Electricals
Click Here to Login
Join Computer forums Today


Reply
 
Thread Tools Search this Thread Display Modes
 
Old 03-23-2007, 06:00 PM   #1
Golden Master
 
Rubber314Chicken's Avatar
 
Join Date: Mar 2006
Posts: 5,574
Send a message via AIM to Rubber314Chicken
Default trying to under stand HDTV

okay, so I was in sears with my parents looking at friges (boring, but I know which ones are better and whatnot), and i get bored, so I go over to see the HDTVs. I was looking at them, and I noticed that some are sharper than others. One would say 1080i, others 720p, and then there were ones that like listed a resolution or something. how does that system work? and why were two identical models, one was blurry, one was really sharp, look different if the only difference was screen size (by 5" or so) if they are both 1080i?
__________________

__________________
AMD Athlon 64X2 4200+, 2 GB ram, 2 TB HDD, Ubuntu+SAMBA ♫ Lenovo T410, i5@ 2.4 GHz, 4 GB ram, 7
Rubber314Chicken is offline   Reply With Quote
Old 03-23-2007, 06:21 PM   #2
Golden Master
 
freestyler105's Avatar
 
Join Date: Sep 2006
Posts: 7,883
Default Re: trying to under stand HDTV

1080 and 720 are resolutions. So a 1080 TV will be much clearer than a 720 TV because there're more pixels, assuming the source video is 1080. 1080 is 1920x1080 pixels, 720 is 1280x720. In comparison, standard TV is 720x480.

Then the P on the end versus the I on the end. P is generally better.
P stands for progressive scan. Each line of each frame is drawn in order, from top to bottom one line at a time. Progressive scan usually looks more detailed, because people perceive the resolution to be greater, even if the resolutions are really the same.
The I stands for interlacing. Most standard tube TVs use this. The difference with interlacing is that it draws every other line at first, and then draws the rest of them. This image explains it:

Because of that, the picture doesn't appear as good as it would with a progressive scan picture.


The smaller the size of a TV, the sharper it will usually look. Assuming they have the same number of pixels, the smaller it is, the more pixels will be packed in there, so the sharper it will be.
__________________

__________________
C2D E6600 | 4GB DDR2-800 | 9800GTX+ | Asus P5B-E | 150GB Raptor | 320GB 7200.10 | 750W Xigmatek PSU
freestyler105 is offline   Reply With Quote
Old 03-23-2007, 06:26 PM   #3
Daemon Poster
 
Anubis1980's Avatar
 
Join Date: Jul 2006
Posts: 1,308
Send a message via MSN to Anubis1980 Send a message via Yahoo to Anubis1980
Default Re: trying to under stand HDTV

I'm pretty new to this too lol, but found this site, might help!

http://www.buyinghdtv.com/html/hdtv_basics.html

As to y one look sbetter than the other etc, i guess its the quality of components used.

Lol ur always quicker at posting than me Freestyler u must have 3 hands
__________________
Intel C2D E6750 (1333fsb) 2.66 @3.5ghz |EVGA 680i SLI Mobo | 2GB Twin XMS ddr800 @ 875 | Leadtek 7950 GX2 Core@601 Mem@1600
500GB IBM/HITACHI Sata2 7200/16MB | 160GB 7200rpm 8mb UDMA133 Maxtor | XION 600w dual 12v 44A total SLI PSU | X-fi Xtreme Music | 22" Widescreen Acer LCD
Anubis1980 is offline   Reply With Quote
Old 03-23-2007, 06:32 PM   #4
Golden Master
 
freestyler105's Avatar
 
Join Date: Sep 2006
Posts: 7,883
Default Re: trying to under stand HDTV

Haha, you caught me.
__________________
C2D E6600 | 4GB DDR2-800 | 9800GTX+ | Asus P5B-E | 150GB Raptor | 320GB 7200.10 | 750W Xigmatek PSU
freestyler105 is offline   Reply With Quote
Old 03-23-2007, 06:32 PM   #5
Site Team
 
David Lindon's Avatar
 
Join Date: Dec 2002
Posts: 15,233
Default Re: trying to under stand HDTV

Quote:
Originally Posted by freestyler105
1080 and 720 are resolutions. So a 1080 TV will be much clearer than a 720 TV because there're more pixels, assuming the source video is 1080. 1080 is 1920x1080 pixels, 720 is 1280x720. In comparison, standard TV is 720x480.

Then the P on the end versus the I on the end. P is generally better.
P stands for progressive scan. Each line of each frame is drawn in order, from top to bottom one line at a time. Progressive scan usually looks more detailed, because people perceive the resolution to be greater, even if the resolutions are really the same.
The I stands for interlacing. Most standard tube TVs use this. The difference with interlacing is that it draws every other line at first, and then draws the rest of them. This image explains it:

Because of that, the picture doesn't appear as good as it would with a progressive scan picture.


The smaller the size of a TV, the sharper it will usually look. Assuming they have the same number of pixels, the smaller it is, the more pixels will be packed in there, so the sharper it will be.
Yeah that pretty much explains it. 1080 is obviously best with the option of progressive scan
__________________
[url=http://www.LNXPS.NET]LNXPS.NET - The XPS Library]
David Lindon is offline   Reply With Quote
Old 03-23-2007, 06:37 PM   #6
Golden Master
 
freestyler105's Avatar
 
Join Date: Sep 2006
Posts: 7,883
Default Re: trying to under stand HDTV

Yeah, the only drawback is 1080 is much more expensive, especially for plasmas.
__________________
C2D E6600 | 4GB DDR2-800 | 9800GTX+ | Asus P5B-E | 150GB Raptor | 320GB 7200.10 | 750W Xigmatek PSU
freestyler105 is offline   Reply With Quote
Old 03-23-2007, 06:52 PM   #7
Golden Master
 
Rubber314Chicken's Avatar
 
Join Date: Mar 2006
Posts: 5,574
Send a message via AIM to Rubber314Chicken
Default Re: trying to under stand HDTV

okay, thanks, that helps.
__________________

__________________
AMD Athlon 64X2 4200+, 2 GB ram, 2 TB HDD, Ubuntu+SAMBA ♫ Lenovo T410, i5@ 2.4 GHz, 4 GB ram, 7
Rubber314Chicken is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are Off



All times are GMT -5. The time now is 12:05 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Friendly URLs by vBSEO 3.6.0