1440p HD

  rdave13 23:29 19 Sep 2014
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I can't grasp the context of 1440p HD. I understand 1080p HD as it uses more bandwidth to produce a clearer picture by using more pixels per cm sq.

As for 1440p, settings on youtube player, the background is always blurred yet the foreground is only as crystal clear as normal full HD. Bandwidth use is also much higher than ordinary HD. My GPU can handle it but I fail to notice if this new technology gives a better performance rather than 'full' HD. Would it make a difference on a TV?

Thanks for your thoughts.

  Ian in Northampton 08:33 20 Sep 2014

rdave13: I'm wondering if you may be under a slight misapprehension? 1080p describes an image that's 1,920 x 1,080 - full HD. 1,440 is commonly used in 1,440 x 900 resolution screens/panels, and is a bit of an oddball as it's a 16:10 aspect ratio rather than 1,920 x 1,080, which is a 16:9 aspect ratio. (Other 16:10 aspect ratios are 1,280 x 800 and 1,920 x 1,200.) Thus, if your screen is a 16:9 screen but you use settings designed for a 16:10 screen, it's gonna look a bit squirly. (And, back in the day, screens were typically 4:3 aspect ratio, until SXGA came along which was 5:4, I think.)

  Secret-Squirrel 09:48 20 Sep 2014

"but I fail to notice if this new technology gives a better performance rather than 'full' HD"

What's the screen resolution of your monitor set to Dave?

"Would it make a difference on a TV?"

Is your TV "HD Ready", full HD or 4K UHD?

  Ian in Northampton 10:53 20 Sep 2014

Secret-Squirrel is right to ask about screen resolution. You should always try to match the image to your screen's native resolution, else some degree of distortion will likely occur as the driver tries to upscale/downscale the image. Thus, if you have a 16:9 aspect ratio, 1,920 x 1,080 screen, driving it at 16:10 1,440 x 900 will not look good. And, re Secret-squirrel's second point: TVs, regardless of whether they're full HD, HD-ready or 4K, have a 16:9 aspect ratio - so trying to map a lower resolution 16:10 image onto it isn't a great idea.

  rdave13 11:44 20 Sep 2014

Monitor is set to 1920 x 1080 default. So it has to do with the ratio of the monitor. That's where I was going wrong. I thought the actual number of 1080p or 1440p only showed the amount of pixels such as 1080 pixels in height x 1920 width. Then that's why the YouTube video showed the background as blurred using 1440p settings as my monitor has the wrong aspect ratio.

  rdave13 11:59 20 Sep 2014

Looking up 4K UHD and 8K UHD which are 2160p and 4320p respectively I'm puzzled by the statement that the minimum aspect ratio would be 16:9 suggesting that other aspect ratios could be set?

  Secret-Squirrel 12:09 20 Sep 2014

"Monitor is set to 1920 x 1080 default."

1440p has a resolution of 2,560 x 1,440 and a 16:9 aspect ratio. Your monitor's current aspect ratio is 16:9 also. The reason you're not seeing any extra detail is because you'd obviously need a monitor that displays at least 2,560 x 1,440 - yours doesn't so your PC has to downscale the image and that's probably why it doesn't look so good.

If you've got a 4K UHD TV then 1440p would probably look very impressive.

  bumpkin 13:23 20 Sep 2014

As I understand it 1440p requires a minimum of 1440 pixels height on the screen. If you only have 1080 then you will only be able to see part of the image unless the number of total pixels is reduced which will give poorer resolution. The same must also be applied to the width to maintain the aspect ratio.

  bumpkin 13:39 20 Sep 2014

A total reduction in pixels of around 44%

  rdave13 13:54 20 Sep 2014
Answer

Thank you all for your replies, been very useful to me. Secret-Squirrel, unfortunately I haven't got a 4K UHD TV yet.

  Ian in Northampton 14:52 20 Sep 2014

Wow - I'm embarrassed. I thought I knew something about display technology - but 1440p had completely passed me by. Based on the responses here, I researched it. Interesting stuff - it seems at one time it was mooted as the next step from HD - but the industry decided to standardise on 4K instead. You live and learn.

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