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I have a question for fellow geeks?

I have a question for fellow geeks? Topic: Forming a research question
November 20, 2019 / By Shirlee
Question: I'm a geek, but my enthusiasm far exceeds my skill. When I do research on google, I can read for an hour and, although I do find a few answers to some of my questions, I end up having more questions. I find Yahoo Answers more useful because, if I'm able to word my question just right, it can save me a tremendous amount of time. Even if I do have to go back and use google, I can be more focused with the answers you guys give. Anyway, we have a 32-inch 720i LCD TV (the lowest resolution). We'd like to move that into a bedroom and upgrade in our living room. Believe it or not, I've been getting different answers, including the internet, but especially from the floor people at Frys and Best Buy. Usually there's just one sales assistant who knows and the rest are just guessing. Of course, the one that knows is always busy! What is your interpretation of these terms: 1. 1080i 2. 1080p (Is 1080 at type of HD ... compared to 720 anyway?) 3. HD (I'm guessing this is just a general term meaning higher resolution.) 4. Blu Ray (Is Blu Ray a type of HD? Are there different kinds or levels of Blu Ray?) Thanks. With your answers, hopefully I can be a more intelligent shopper. Also, this seems like a really cool idea. Decent laptop projectors are just a few hundred dollars or less if you can find them on sale. I could be talked into sacrificing resolution in favor of saving money and getting and even bigger picture. Do you think it's a good idea to buy a laptop projector and show movies on a blank wall? I'm asking becasue I don't see many people doing this. More often than not, people pay more for big screen TVs. I know our kids would sure love the movie theater atmosphere!
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Best Answers: I have a question for fellow geeks?

Petra Petra | 7 days ago
1080i is a picture with 1080 lines of resolution (from top to bottom) that uses interlaced scanning. 1080p is progressive scanning. A TV picture works by breaking up the picture into a bunch of horizontal lines, and then by scanning across the screen one line at a time until the entire picture is shown. Interlace scanning is where the odd numbered lines (1, 3, 5, etc.) are displayed and, when they're all complete, the even numbered lines (2, 4, 6, etc.) are displayed. This prevents a flickering kind of appearance on the TV, since earlier TV technology could only display the entire picture 30 times a second. With interlace scanning, the odd lines are still visible to the human eye because of what's called persistence of vision when the even lines are being scanned, and vice versa. So, there is no perceptible loss of information on the screen between the odd and even frames. Progressive scanning is where all lines of the picture - odd and even - are scanned sequentially, so that the entire picture is put up on the screen 60 times a second. This is possible with the faster electronics we have on today's HD screens. 720p HD has only 720 lines of resolution on the screen, compared to 1080. So, you can see how you would be able to display much greater detail with 1080p HD than 720p. However, if you have a TV with a screen that is 32 inches or less, or you are viewing a TV from a fair distance away (more than about 12 feet for a 40-inch TV, for example), your eyes can't really resolve the difference between 720 and 1080 HD. Original DVD players used a red laser light to shine against the surface of the disk and pick up the information. The red color is due to the light being at a certain wavelength (the inverse of frequency). Blue light is at a higher "frequency" and, therefore, has a shorter wavelength. This means that we can pick up data faster using a blue light instead of the red. The result is then, for a given disk size, we can store more information on the disk. And, we can pick that information up faster. In fact, the red light system is so slow that it can't pass as much data to form the 1080p HD signal. But, the shorter wavelength blue light can. So, the Blu Ray standard was adopted for playing true 1080p HD off of a disk.
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Petra Originally Answered: A question for fellow Christians?
Satan told God that he could get Job to follow in his steps and God said watch me. i will take his land, his animals, and his family and he will still follow me. and Job did.

Marlene Marlene
Ok, first you have a 720p tv. 720i doesn't exist. 1. 1080i An old resolution for hdtvs, although some tv stations still broadcast in it. i means interlaced, which means you see every other line of the picture at a time(to save bandwidth). It wasn't a problem with 24fps film content, but with video material, the resolution is reduced during scenes of high motion. 2. 1080p (Is 1080 at type of HD ... compared to 720 anyway?) The most common resolution of tvs today. p stands for progressive, which means the whole frame is displayed at once. The 1080 in both i and p is the vertical resolution of the picture. The complete resolution is 1920 pixels by 1080 pixels. 720p is the lower end of HD and is 1280x720. 720p is going away as 1080p is taking over. 3. HD (I'm guessing this is just a general term meaning higher resolution.) yes. Standard Definition(SD) was approxmilty 640*480 resolution and anything higher than that is considered HD. 4. Blu Ray (Is Blu Ray a type of HD? Are there different kinds or levels of Blu Ray?) Blu-ray is simply a high capacity optical disc. It can be used to store HD movies(which are typically high in file size) or any other form of data. They hold more data than dvd which is why they are now used for HD movies. Projectors are nice, but the bulb inside them only lasts a couple years of heavy use and can cost over $300 to replace. Most people can't afford to use projectors as their regular tv and only use them for special movie nights once a week or so if they can afford it.
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Kym Kym
I can give you an authoritative answer. In general all these numbers, whether 480, 540, 720, or 1080 refer to some aspect of the picture resolution - more specifically they refer to the number of vertical lines. Also one thing you need to understand is the rate at which the image is displayed on the screen, which are influenced by a few things: 1) Actual film (i.e movies) are shot at 24 frames per second. In a movie projector, each frame is illuminated to the screen (frame by frame) progressively. You get ALL of each frame every 1/24 of a second. This is where the word PROGRESSIVE comes in. 2) The power coming into your house is delivered by the electric company as an AC signal at either 50 or 60 cycles per second (Hertz or Hz) depending on which country you live in. 3) In the analog days, when video was sent over the air, half the picture (called a field - every other line of a picture) was sent every cycle. So if you are in the USA where the power comes in at 60Hz, you get 1 frame every 2 cycles. The first cycle you get the odd lines, and the second cycle you get the even lines. This is what they call interlacing, and where the term INTERLACED comes in. Currently 1920x1080 (1920 pixels wide and 1080 pixels tall) is the highest resolution for an HDTV image. 720i/p refers to a picture of 1280x720 resolution, and 480i/p refers to a picture of 720x480 resolution. Now, to answer your questions: 1. 1080i refers to a picture resolution of 1920x1080, but the picture is constructed from interlaced frames. 2. 1080p refers to a picture resolution of 1920x1080, but the picture is delivered frame by frame. 3. You are correct. HD = high definition, as opposed to SD or standard definition, which has a maximum picture size of 720x576 or 720x480 depending on what part of the world you live in. 4. Blu-Ray is a disc format. The content being put on these discs are often (but no limited to) high definition content. Honestly, if you are watching on an LCD or Plasma TV and if you are watching broadcasts from cable or satellite, all interlaced content is deinterlaced before it can be displayed. So you actually get a progressive frame no matter what. Furthermore, there aren't any 1080p @ 60 frames per second over live broadcasts yet. Most Blu-Ray discs are movies, which are derived by film, which studios encode onto the disk at 1080p @ 24fps. So, in my opinion you cannot tell the difference between 1080p or 1080i. You will only be able to tell if you have content that can utilize 1080 resolution at 60 frames per second, since 1080i @ 60 fields per second maximally gives you 30 frames per second.
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Jemima Jemima
1. I like to call it the "fake" 1080p (and I wouldn't even call it HD either). 1080i displays 1080 vertical lines of pixels, like a 1080p display. However, the 'i' in 1080i stands for interlaced, meaning that it really only shows half of the vertical lines per frame. With interlaced video, the tv displays each vertical line alternating every frame to give you the appearance of a 1080p display. But if you freeze frame the tv, you will see that at any given moment, you are only seeing half of the picture. In numbers, it would be 1920x1080/2, making it the equivalent of 720p. But there's another drawback to 1080i being interlaced. Interlacing the picture makes it blurry, and movements less fluid. In some cases, It also causes artifacting, the same thing you see when watching an SD source on an HDTV. Overall, 1080i is a big no-no if you want to get the most out of your HDTV or movies. 2. 1080p is what is considered Full HD. It offers a 1920x1080 progressive picture (progressive means that all of the lines of display are shown at once, unlike 1080i which only shows half). It allows for a smooth, and very detailed picture. If you are getting a new tv, make sure it supports 1080p! 3. High definition is considered to be anything above 480p (aka Standard Definition). Also, while we're at it, here's some additional info about SD. Your normal big box tube tv only operates in 480i. From what we learned in the first point about 1080i, that means that tube tv's technically ran in sub-SD, exactly half of 480p. This is also why standard definition sources look horrible on HDTVs. If you watch a normal tv broadcast of 480i, a 1080p hdtv would have to scale that 480i picture to almost 10 times it's original size to make it fit the screen. When you stretch the picture that much, it really starts to look horrible. 4. Blu-ray is the current high definition media standard. It supports all of the bells and whistle of modern home entertainment such as 1080p video, 7.1 uncompressed audio, Deep Color color representation (displays colors that the human eye can't even see), incredible contrast ratio, and fluid motion with 60Hz video. If you want to watch HD movies on your HDTV, you will need a Blu-ray player. You can get them for around $150 these days, or you could pick yourself up a ps3 which will also give you HD gaming, an online video store, a blu-ray player, a DVD upscaler, media streaming, a photo viewer, a music player, and more. Blu-ray is a data disc format like dvd, and there aren't really any different levels to it. Projectors are a great choice, but you have to make sure you get a good one, and you have all of the necessary requirements for one. First of all, you need to get a fairly high quality one (probably around $1000) if you want it to display a decent picture, and have a decent brightness level and contrast ratio. You would also need to make sure your wall isn't reflective , and you can make your room nearly completely dark. You also need to worry about your bulb dying, because they cost hundred of dollars to replace. (but it usually takes a few years for that to happen.)
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Felicia Felicia
1. 1080i, once was a high resolution, in tube televisions, but is not inferior to 1080p 2. 1080p is the best, and baddest out there. The p stands for pixels. Theoretically, it shows the best quality of an image. Definitely shoot for a 1080p television, even though they're more pricey.. 3. HD, High Definition. For example, TV shows are sometime broadcasted in High Definition. Its not the same as high resolution, but its similar in meaning. High Definition is more like the broadcasting, and high resolution is how it appears on the receiving end. 4. Blu Ray is a a type of disc, made by Sony, I believe. Its like a DVD, and A VHS. Except, its the newest, highest resolution capable disc. Also, it has a higher capacity for longer movies. Like a DVD had the highest quality, and before that a VHS, it is now, arguably, the best "disc" out there. And do you know what looks amazing?? A blu ray disc on a 1080p tv.
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Corynn Corynn
1080p is full HD (high definition) 1080i is less good than 1080p, but you really wont notice a difference. HD, yeah, ur kinda right. blurasy is a player, like a dvd player, but is way better, and has 1080p
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Corynn Originally Answered: Fellow Christians, this is a question for you?
Ephesians 2:8-9: "For it is by grace you have been saved, through faith—and this not from yourselves, it is the gift of God— not by works, so that no one can boast." That pretty much sums it up, Del. :^) Actually, Ephesians 2:8-9 is the all-purpose verse I get from evangelicals to many of my questions. It arrives without context (Paul was talking about works of Jewish piety, not about works of charity) and it is often misinterpreted to supply a non-existent word, ALONE, as in "through faith alone." Bible verses can certainly provide legitimate evidence, but they are not self-interpreting. I want to know what conclusions are being drawn from the quoted verse. Cheers, Bruce

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