In the United States, there are two standard resolutions for cable TV broadcasts: 720p and 1080i. Much like 1080p, the number refers to the vertical resolution of the screen, 720 and 1080 pixels. The letter refers to either progressive scan or interlaced scan. Every TV sold today uses progressive scan, but they're also compatible with a 1080i signal.
In the end, 1080i and 720p end up using about the same amount of bandwidth, even if 1080i covers over twice as many pixels. This means that still images look sharper on 1080i, but it isn't perfect. As you can see in the pictures above with the Samsung Q9F, 720p looks much clearer with motion. This is why sports channels use 720p since fast-moving content may not look smooth with 1080i signals.
Xbox Netflix Only 720p Or 1080i
3. Why is 1080p theoretically better than 1080i?1080i, the former king of the HDTV hill, actually boasts an identical 1920x1080 resolution, but conveys the images in an interlaced format (the "i" in 1080i). In a CRT, 1080i sources get rendered on-screen sequentially: the odd-numbered lines of the image appear first followed by even lines, all within 1/25 of a second. Progressive-scan formats such as 480p, 720p and 1080p convey all the lines sequentially in a single pass, which makes for smoother, cleaner visuals, especially with sports and other motion-intensive content.
4. What content is available in 1080p?Today's high-def broadcasts are done in either 1080i or 720p, and there's little or no chance they'll jump to 1080p anytime soon because of bandwidth issues. As for HD gaming, Xbox 360 and PlayStation 3 games are available in both 720p and 1080p resolutions. (Also, the 720p titles can be upscaled to 1080i or 1080p in the user settings of those consoles).
5. What kinds of TV technologies offer 1080p resolution?Aside from CRT, which has basically been discontinued, every technology on the market comes in 1080p versions. That means you can find 1080p-capable versions utilising all fixed-pixel technologies, including DLP, LCoS and LCD projectors, and flat panels (plasma and LCD). Of course, as specified above, more affordable entry-level models are still limited to 720p resolution. But whatever the resolution, all fixed-pixel TVs are essentially progressive-scan technologies. So when the incoming source is interlaced (1080i or even good old-fashioned 480i standard definition), they convert it to progressive-scan for display.
Whether you're dealing with 1080p24 or video-based 1080p50 doesn't alter our overall views about 1080p TVs. We still believe that when you're dealing with TVs 50 inches and smaller, the added resolution has only a very minor impact on picture quality. In our tests, we put 720p next to 1080p sets, then feed them both the same source material from high-end Blu-ray players. We typically watch both sets for a while, with eyes darting back and forth between the two to look for differences in the most-detailed sections such as hair, textures of fabric, and grassy plains.
Katzmaier stands by his previous analysis: the extra sharpness afforded by the 1080p televisions he's seen is noticeable only when watching 1080i/1080p sources on larger screens, say 55 inches and bigger and projectors that display wall-size pictures. Katzmaier also adds that the main real-world advantage of 1080p is not the extra sharpness you'll be seeing, but instead the smaller, more densely packed pixels. In other words, you can sit closer to a 1080p television and not notice any pixel structure such as stair-stepping along diagonal lines or the screen-door effect (where you can actually see the space between the pixels). This advantage applies regardless of the quality of the source.
The story is based on an internal memo apparently being distributed around US GameStop stores, stating that the new, "K chassis" PlayStation 3s ship with a basic AV cable, but the AV port itself will not support HD output (720p, 1080i, 1080p) when a component cable is connected. All current PlayStation 3 models include this functionality - and very useful it is too for those with older HDTVs.
Your only options with the 360 are 1080p60 or 1080i30. There are some devices like the WD TV that will output Netflix at 24/25 fps if you force it to, but most like the 360 and PS3 are locked to one frame rate for games & apps. To capture 24 fps you can capture at 1080i30 and IVTC.
Better resolution has been the name of the game for televisions over the last decade. First it was color, then it was HD, then 720p, then 1080p and now, finally, 4K. Is more always better? At what point does resolution stop mattering? After all, the human eye is only capable of seeing so much detail, right? Have we already hit that threshold? In short, it depends.
A quick recap. High Definition, or HD, arrived over a decade ago, starting with a resolution of 720p. Full HD quickly took over, pushing the pixel count up to 1080p. (There was also 1080i, but you don't need to worry about that now.) The number refers to the number of horizontal pixels that make up the image your television produces.
There are four certification standards for HDMI cables that pertain to home use. Cables that are certified as Standard are "tested to reliably transmit 1080i or 720p video". There are two varieties of Standard cables, those with an ethernet channel and those without. High-Speed HDMI cables are tested to transmit video resolutions from 1080p to 4K along with a richer color palette. High-Speed HDMI cables also come in ethernet and non-ethernet versions. If you want 4K resolution with or without HDR, you need High-Speed HDMI cables.
Most boxes will also ask for an output resolution setting. Choices will include 480i, 480p, 720p and 1080i. With 1080p TVs (most current models), this control should be set to 1080i (some cable/satellite boxes also allow 1080p output, but it only applies to pay per view movies). 2ff7e9595c
댓글