Friday, March 27, 2020

2K versus 4K and 8K

When 4K TV's first came out, some people pointed out that your eyes can't see in 4K. (I know mine can't.) I bought a 4K TV anyway on a Walmart Black Friday sale at a great price.

The 4K designation is a bit deceptive because the 4K refers to the number of horizontal pixels. In the past, video resolutions were designated by the number of vertical lines. Therefore, just so we are clear, 4K is 2160P, and 1080P is 2K.

Old tube TV's broadcast in 480i, which means the video was only 480 lines, and the TV takes two 1/60th of a second cycles to draw the entire screen.

The most you can get out of broadcast TV right now is 1080i. The old TV shows that dominate broadcast TV were recorded on videotape, which is 480i, so that how they are broadcast today. Blu-ray disks are typically 1080P, and DVD's can be as low as 480p. There is a special Blu-ray format that is 4K, but you need a Blu-ray player that supports it.

When movie theaters started using digital projection, the format they used was 2K, and some later movies were shown in 4K. I am one who sits on the front row of a theater when everybody else sits 2/3 of the way back. (That's kind of nice for me actually.) Even with a giant screen in front of me, I can't notice any lack of resolution with a 2K or 4K projection.

My favorite computer resolution is 1440P, which is technically 2.5K, and this is what I use now. This is an ideal resolution for playing games. The Apple iMac that I own is capable of 5K, which is overkill on Apple's part because it doesn't make sense to have that much detail on a 27-inch monitor.

On my computer, I routinely watch videos that are 720P and I never notice any lack of clarity.

So now the industry is developing 8K TV's, which is insane. Your eyes will not see the difference, and there's not going to be any content available in 8K. The new videogame systems that are coming out this year are also going to support 8K, but likely just for content and not for games which will be in 4K instead. Right now you can buy a 98 inch Samsung 8K TV for $79,000. This is insane.

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Best wishes,

John Coffey

http://www.entertainmentjourney.com

Thursday, March 5, 2020

Tuesday, March 3, 2020

Walmart's $250 laptop is AWESOME!

Because of new chips, people can get much more power on budget devices.  The processor benchmarks at 90% of my 2009 Core-i7 iMac, which is not bad.  The graphics are far superior.  There are few drawbacks, but just enough that a person might want to wait for next year's model or a cyber Monday sale.

https://www.youtube.com/watch?v=0hMdQAjy43A

On Walmart's website, this currently lists for $299.