Gadgetory

a what's up guys I'm Kay PhD here and today I'm going to be talking about 4k explained so you've probably heard 4k tossed around quite a bit in the past couple of weeks or months especially during CES at the beginning of January this year 4k has been sort of a buzzword but what is 4k mean exactly well there's not a whole lot to technically explain but there is a lot to it so 4k is a resolution really and it's measured in pixels just like every other resolution starting at the smallest you can see smartphones nowadays the average smartphone is about 1280 by 720 so it's a 1280 by 720 we call it a 720p display your average laptops a which has a slightly bigger display is typically somewhere around 1440 by 900 somewhere around there then you get up to the larger desktop displays and these are usually around 1920 by 1080 these are called 1080p displays 4k displays are somewhere around 4000 pixels across by 2000 pixels down now I say somewhere around that because 4k actually varies there isn't an exact standard yet but the closest thing we have to a standard for 4k is called UHD and UHD stands for ultra-high definition and that is 3840 by 2160 that is a lot of pixels there are more pixels on a 4k display than there are seconds in three months so if you're going to try to count all these pixels you're going to take a while now in terms of pixel density I already did a video about pixel density but we already know that basically the higher the pixel density of a display the better it looks the more clear the more sharp it looks because there are more pixels for you to look at to make the image look good so this also depends on the distance you are viewing that item from so we'll start off with smartphones if you're looking at a 1280 by 720 display a couple inches from your face you don't really use your smartphone that far away from your face so you really need it to be a high pixel density because I'm pretty close I can see a lot of pixels of his bed so given that we hold these guys a foot or less away from our face I'll give the average smartphone an average pixel density of 300 PPI or 300 pixels per inch a laptop since you hold it further from your face doesn't have to be quite as high a pixel density so if you're looking at maybe a 15-inch laptop with that 1440 by 900 resolution you are looking at a pixel density of about 120 PPI which is good because it's already you know 2 feet away from your face now so you can't really see how pixels at 120 PPI so 120 is pretty good for a laptop when you get to a huge display that you're sitting kind of far away from like a 1080p 55 inch TV you get to a pixel density of 40 40 PPI now that seems low because you know we were just talking about 300 PPI phones but sitting 10 10 15 20 feet away from it you're never going to be able to see those pixels at 40 PPI so it's a really high crisp resolution display but that's just 1080p now I'm sure you've all as a kid or at least some time in your life walked up to a TV and looked at all the red green and blue pixels that is called the sub pixel matrix basically when you're looking at these pixels those are the colors that make up the images that you see on your TV in order to see those you had to get up like all the way up to the TV and look at it from a couple of inches away and then you can see all the pixels with a 4k TV you will actually never be able to see those red green and blue pixels a 4k 55 inch TV comes in over a hundred PPI which means you can be inches from it like a laptop and still not be able to see the pixels standing five eight twelve feet away from a 4k TV will look flat-out incredible really really sharp now I don't have a 4k TV personally but I saw a ton of them at CES 2013 you might have seen my video recap of that event if you haven't it's down below the like button on this video but there were a ton of 4k TVs playing 4k content like videos and video games on these TVs and everyone who walked by pretty much paused for a second and stared at it because it was that off striking it was really good looking it's almost like a little bit below that level of looking through a window it's just sort of a surreal sort of realism you get especially if you have a high frame rate a really good 4k video looks incredible on any 4k TV now the first problem with 4k TVs is that they're a little bit expensive okay not a little bit expensive they are really expensive not six seven thousand dollars I'm talking new car twenty five thousand thirty thousand US dollars expensive so these are crazy out-of-this-world expensive right now but again we saw them on a show floor at CES for the past two years that's kind of where the sort of innovation starts and maybe in another two or three years it'll be in our living rooms but the other problem with 4k at least right now if you want to call it a problem is that there is barely any 4k content remember when we saw 3d TVs at CES and they all have those awesome 3d videos and the 3d glasses but nobody makes 3d content well Sony's sort of pushing the way for more 4k content to be produced and there are some awesome cameras out there I have a link description below that will shoot 4k so Sony's pushing the way a lot of big companies are sort of following behind and making you know it easier for you to get 4k content into your home even if you don't have a 4k display it still looks really good on a 1080p display and a 2560 by 1600 display so basically what that means is you know TV shows aren't 4k today but if this keeps up you know the past two years have been good if they keep going it's going to be really good and hopefully we'll see some awesome 4k stuff in the future so the largest hub out there right now for 4k content is of course the internet specifically web video like YouTube but the thing is people who are going out and shooting videos on the red scarlet and the red epic and 4k cameras putting it on YouTube it gets compressed way down to you know 50 megabits per second tops the bitrate gets lowered it gets compressed and you don't get the full quality of it watching it on YouTube that being said I have a video linked in the description below where you can watch a 4k video on Vimeo and Vimeo seems to have the sort of clearest compression or littlest compression at all so you can watch that video on your display I guarantee you it's going to look great you can leave a comment below if you enjoyed it it's a pretty great video and the it's just really really crisp and clear you can see every little detail and everything so if you want to watch 4k content the web is the place to be YouTube not so much but Vimeo is a great place to find it also fun fact when you view a 4k video on YouTube there is a button just for 4k so you know how you see 240p 360p 480p 720p and 1080p there's a button that says original for anything over 1080p so if you upload a 4k 5k 8k video you get a special button so yeah there you go that's 4k explained it's pretty basic but again it's pretty awesome I'm hoping someday in the future we'll have you know 4k displays in the palm of our hands playing 4k games we saw Nvidia's project shield which was outputting 4k video from a handheld console to a 4k TV so I know that's a step in the right direction and hopefully we'll see more stuff like that very soon let me know if you guys are excited for 4k or if that's so yesterday and that 8k tv s CES is the future either way thanks for watching guys and I will talk to you guys in the next video which will get started with the long-awaited hackintosh pro project that's finally getting started so thumbs up if you're ready for them thanks for watching peace you