Ultra- high- definition television - Wikipedia. Comparison of 8. K UHDTV, 4. K UHDTV, HDTV and SDTV resolution. Ultra- high- definition television (also known as Ultra HD television, Ultra HD, UHDTV, UHD and Super Hi- Vision) today includes 4. K UHD and 8. K UHD, which are two digital video formats that were first proposed by NHK Science & Technology Research Laboratories and later defined and approved by the International Telecommunication Union (ITU).[1][2][3][4]The Consumer Electronics Association announced on October 1. Ultra High Definition", or "Ultra HD", would be used for displays that have an aspect ratio of 1. In 2. 01. 5, the Ultra HD Forum was created to bring together the end- to- end video production ecosystem to ensure interoperability and produce industry guidelines so that adoption of Ultra- high- definition television could accelerate. From just 3. 0 in Q3 2. K resolution.[7]The "UHD Alliance", an industry consortium of content creators, distributors, and hardware manufacturers, announced during CES 2. Ultra HD Premium" specification, which defines resolution, bit depth, color gamut, high- dynamic- range imaging (HDRI) and rendering (HDRR) required for Ultra HD (UHDTV) content and displays to carry their Ultra HD Premium logo.[8][9][1. Alternative terms[edit]Ultra- high- definition television is also known as Ultra HD, UHD, and UHDTV.[1. In Japan, 8. K UHDTV will be known as Super Hi- Vision since Hi- Vision was the term used in Japan for HDTV.[1. The MKV video converter can easily convert MKV to other movie formats like AVI, DivX, Xvid, WMV, MP4, H.264, MOV, HD video, etc.In the consumer electronics market companies had previously only used the term 4. K at the 2. 01. 2 CES but that had changed to "Ultra HD" during the 2. CES.[1. 6][1. 7] The "Ultra HD" term is an umbrella term that was selected by the Consumer Electronics Association after extensive consumer research, as the term has also been established with the introduction of "Ultra HD Blu- ray".[2. Technical details[edit]Super Hi- Vision specifications: [1. Number of pixels: 7. Aspect ratio: 1. 6: 9. Viewing distance: 0. HViewing angle: 1. Professional Converting Function. 4Videosoft Video Converter supports all the video and audio formats, including SD, HD and 4K UHD videos. Then it can convert the. Ultra-high-definition television (also known as Ultra HD television, Ultra HD, UHDTV, UHD and Super Hi-Vision) today includes 4K UHD and 8K UHD, which are two digital. Colorimetry: Rec. Frame rate: 1. 20 Hz progressive. Bit depth: 1. 2- bits per color RGBAudio system: 2. Sampling rate: 4. Hz. Bit length: 1. Number of channels: 2. Upper layer: 9 ch. Middle layer: 1. 0 ch. ![]() ![]() Lower layer: 3 ch. LFE: 2 ch. Uncompressedvideo bit rate: 1. Gbit/s. Resolution[edit]Two resolutions are defined as UHDTV: [1. UHDTV is 3. 84. 0 pixels wide by 2. UHD should not be confused with 4. K as they are not the same thing. K] [3]]UHDTV is 7. HDTV, which brings it closer to the detail level of 1. IMAX.[1. 4][2. 3][2. NHK advocates the 8. K UHDTV format with 2. Super Hi- Vision. Color space, dynamic range, frame rate and resolution/aliasing[edit]The human visual system has a limited ability to discern improvements in resolution when picture elements are already small enough or distant enough from the viewer. At home- viewing distances and current TV sizes, HD resolution is near the limits of resolution for the eye and increasing resolution to 4. K has little perceptual impact, as consumers are beyond the critical distance (Lechner distance) to appreciate the differences in pixel count between 4. K and HD. One exception to note is that even if resolution surpasses the resolving ability of the human eye, there is still an improvement in the way the image appears due to higher resolutions reducing aliasing. In this context, it is important to be aware of two different types of what is often referred to be aliasing, but occur because of different reasons: The first one results in false detail/moiré/striped patterns in the displayed image due to improper filtering of high spatial frequencies contained in the original image. Thus, all the details exceeding the Nyquist frequency, which is determined by the resolution of the display like a TV or projector, will fold back into the given bandwidth, leading to distortion in the form described before. This issue is not caused by the limited resolution of the display and can principally be avoided by filtering the original image when downscaling it to the proper native display resolution. The often witnessed pixelized stairsteps of a low resolution image is not a direct consequence of what would correctly be called aliasing as no "false frequencies" are present but because the pixel pattern is simply not detailed enough. When reproduced correctly with a non- pixel- based screen in theory, any image would not become pixelized with lower and lower resolution, but only less and less sharp. Which leads to the second type. The second type is more precisely called "imaging", at least in the audio domain, however misleadingly often enough called aliasing as well (even in technical literature), and refers to the high frequencies introduced by the nowadays pixel- based display of images. The individual pixels which in theory are only supposed to serve as individual samples for an entirely analog reconstruction, just like with audio, by their nature, when used "as is", have sharp discreet edges which equal high spatial frequencies (which couldn't have been present in the analog original in the first place as they would have been filtered before the A/D- process takes place), leading to a "pixelized" look if inside the visible bandwidth. This second type of aliasing (imaging) can be defeated in two ways: one can use a pixel- based resolution which depending on the distance and eyesight of the user, is high enough so that the eyes and their optical system serve as a low- pass filter (which already happens with 2. K in many environments) or secondly, one could correctly filter the high spatial frequencies (anti- imaging, analog to the audio domain again) by either using other techniques than a pixel- based screen (CRT for example) or applying an optical filter in addition between the screen and the user. In this context, raising the display resolution as mentioned before introduces two advantages in practise, where pixel- based displays and non- perfect downscaling probably will continue to persist: when downscaling without proper filtering, the higher end- resolution of the display allows more "headroom", where less aliasing will occur because the false frequencies will be "mirrored back" into the regular bandwidth at a later point, becoming eligible or less apparent at least. Secondly, the higher the display resolution, the higher the high spatial frequencies will be as well, which are introduced by the pixel- based rasterizarion. Compared to the audio domain, it is essentially noise shaping. In the case of images and video, the "noise" will be shifted into frequencies beyond what the eyes are able to resolve, cleaning up the usably bandwidth which is the actual image the user is supposed to see. UHDTV, however, allows other image enhancements than pixel density. Specifically, dynamic range and color are greatly enhanced, and these impact saturation and contrast differences that are readily resolved and greatly improve the experience of 4. KTV compared to HDTV. UHDTV allows the future use of the new Rec. UHDTV) color space which can reproduce colors that cannot be shown with the current Rec. HDTV) color space.[1. In terms of CIE 1. Rec. 2. 02. 0 color space covers 7. DCI- P3digital cinema reference projector color space of just 5. Adobe RGB color space, while the Rec. 7. UHDTV's increases in dynamic range allow not only brighter highlights but also increased detail in the greyscale. UHDTV also allows for frame rates up to 1. UHDTV potentially allows Rec. HD services without increasing resolution to 4. K, providing improved quality without as high of an increase in bandwidth demand. History[edit]2. 00. Prototype camera head (2. Prototype camera head (2. NHK researchers built a UHDTV prototype which they demonstrated in 2. They used an array of 1. HDTV recorders with a total capacity of almost 3. TB that could capture up to 1. The camera itself was built with four 2. CCDs, each with a resolution of only 3. Using two CCDs for green and one each for red and blue, they then used a spatial pixel offset method to bring it to 7. Subsequently, an improved and more compact system was built using CMOS image sensor technology[2. CMOS image sensor system was demonstrated at Expo 2. Aichi, Japan, the NAB 2. NAB 2. 00. 7 conferences, Las Vegas, at IBC 2. IBC 2. 00. 8,[2. 8]Amsterdam, Netherlands, and CES 2. A review of the NAB 2. Broadcast Engineering e- newsletter.[2. Individuals at NHK and elsewhere project that the timeframe for UHDTV to be available in domestic homes varies between 2. Japan may get it in the 2. Total Video Player - Free download and software reviews. Total Video Player is a free media player that can play most of the video and audio files most people need to be able to play, as well as CDs and DVDs. It's compact and doesn't require extra codecs, though if there's a type of file you need to play and TVP doesn't play it, you're better off with one of the open source players that can play any file type. What TVP has to offer over those others is simplicity: It's easy to set up and use, though it's not stripped- down or lacking in amenities. While it's generally a good performer, we found it a bit clunky in some operations. During the setup and installation process, we had the opportunity to associate our media files with TVP all at once or individually, which lets you use TVP for certain file types only, if you should choose to. TVP's user interface and layout are as basic as any media player's, with a menu bar and set of controls above and below the main display, respectively. We clicked the File menu to open a clip, but our mouse button had no effect. We clicked again, and the File menu appeared, though a bit slowly. But our video opened and played normally. Picture and sound quality were comparable to what we've experienced with other media players, which is to say both are limited by the quality of the source file and your PC's graphics and sound capabilities. TVP played everything we threw at it; it seems unlikely that many users will need anything more for day- to- day duties. Settings include hotkeys and subtitles, and we could change the interface language. Like most media players, TVP has a playlist that can be opened and closed. Extras include Visualizations such as Oscilloscope and EQ. As we noted, we experienced some clunkiness with Total Video Player's controls. Most of the time, we had to click a menu item more than once to activate it. It got to be a bit annoying. There's no Help file to speak of, either. Still, Total Video Player is worth a try. Editors' note: This is a review of the trial version of Total Video Player 1.
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