Haven’t needed it in years, but when it was still common that VGA was the only input into an LCD, this website had the images for easy calibration to perfect pixel alignment.
I recall when the first LCD TVs came out and I wanted to get a cheap 1080 one. The problem was that almost every TV said 1080 even if it was just 720 upscaled.
I put a uniform image in BMP on a memory stick - every column being R, then G, then B repeated. As the image was exactly 1080, viewing it in full-screen on a 1080 screen gave a sort of uniform grey color. On an upscaled monitor you could see very visible banding.
This would not have worked had the image been JPG.
Overscan is where it cuts off the edges of the image right?
I’m sure an LLM could offer an explanation, but I genuinely have never understood why overscan is even a thing on HDMI ports.
Most times I plug my AppleTV or laptop into a TV using HDMI by default it’s cutting off the edge of the image. When is it ever a good thing to cut off the edges of the incoming digital image and why does this seem to be the default behaviour on most TVs?
Edit: I asked an LLM and it says some content includes junk on the edge of images because it was never meant to be visible, so TVs enable it by default to cut down complaints/support requests. Apparently, even though HDMI supports a way to signal to TVs to disable overscan, many TVs ignore it.
I’m in my 40’s and have yet to personally encounter content where overscan should be used.
Maybe it was important in the early days and TV manufactures just never stopped doing it even though it’s almost never an issue any more. So we have a situation now where probably everyone has either manually changed their TV from its default or more likely are seeing an over scanned and thus non-pixel aligned image.
Maybe having some image processing circuitry that deals with both the analogue-originated signals and the HDMI-originated signals reduced cost and/or time-to-market.
For if it is still hugged to death
https://web.archive.org/web/20260622172525/https://www.displ...
beautiful web design :) We aren't usually supposed to comment on it but im pretty sure thats exactly the reason this has been submitted.
It’s like a slice of the earlier web. Realized I haven’t seen a c|net logo around for a long time.
I'm not familiar with DisplayMate, and the site appears to be hugged. Unsure what this is doing on the front page, but for any similarly lost folks:
> DisplayMate is the Worldwide Leader in Video Diagnostics and the World's most advanced Display Calibration and Optimization Software.
"The Standard of Excellence for Image and Picture Quality"
Yeah you are, you go girl.
I’ve always used lagom.nl/lcd-test/
Haven’t needed it in years, but when it was still common that VGA was the only input into an LCD, this website had the images for easy calibration to perfect pixel alignment.
A popular tool preceding the days of YouTube reviews, used for testing and reviewing displays.
Am I confused, or are these a bunch of JPGs on a CD? There's no hardware, right?
I couldn't see any hardware, which makes it vastly inferior to say Spyders that I've always used.
https://www.datacolor.com/spyder/
TLDR: Not JPGs, BMPs more likely.
I recall when the first LCD TVs came out and I wanted to get a cheap 1080 one. The problem was that almost every TV said 1080 even if it was just 720 upscaled.
I put a uniform image in BMP on a memory stick - every column being R, then G, then B repeated. As the image was exactly 1080, viewing it in full-screen on a 1080 screen gave a sort of uniform grey color. On an upscaled monitor you could see very visible banding.
This would not have worked had the image been JPG.
Why do you think it wouldn't work for a JPEG? I just made one like that, and it worked just fine.
This would also help to detect overscan. I remember when I was shopping for my first 1080p TV, many (most?) had overscan and no way to turn it off.
Overscan is where it cuts off the edges of the image right?
I’m sure an LLM could offer an explanation, but I genuinely have never understood why overscan is even a thing on HDMI ports.
Most times I plug my AppleTV or laptop into a TV using HDMI by default it’s cutting off the edge of the image. When is it ever a good thing to cut off the edges of the incoming digital image and why does this seem to be the default behaviour on most TVs?
Edit: I asked an LLM and it says some content includes junk on the edge of images because it was never meant to be visible, so TVs enable it by default to cut down complaints/support requests. Apparently, even though HDMI supports a way to signal to TVs to disable overscan, many TVs ignore it.
I’m in my 40’s and have yet to personally encounter content where overscan should be used.
Maybe it was important in the early days and TV manufactures just never stopped doing it even though it’s almost never an issue any more. So we have a situation now where probably everyone has either manually changed their TV from its default or more likely are seeing an over scanned and thus non-pixel aligned image.
Maybe having some image processing circuitry that deals with both the analogue-originated signals and the HDMI-originated signals reduced cost and/or time-to-market.
Website appears to be down.
HN hug of death
Better call Web Dude
Definitely DONT call the Sales Guy!
Why is this on the front page? :)
Web design style nostalgia, I suppose.