1080i is the shorthand name for a format of high-definition video High-definition video or HD video refers to any video system of higher resolution than standard-definition video, and most commonly involves display resolutions of 1280×720 pixels (720p) or 1920×1080 pixels (1080i/1080p). This article discusses the general concepts of high-definition video, as opposed to its specific applications in television modes. 1080 denotes the number of horizontal scan lines—also known as vertical resolution—and the letter i stands for interlaced Interlace is a technique of improving the picture quality of a video signal without consuming extra bandwidth. Interlaced video was designed for display on CRT televisions. In the alternate format of high-definition video mode, known as 1080p 1080p is the shorthand identification for a set of HDTV video modes which are characterised by 1,080 lines of vertical resolution and progressive scan (meaning the image is not interlaced), the p would stand for progressive scan Progressive or noninterlaced scanning is a method for displaying, storing or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to the interlacing used in traditional television systems where only the odd lines, then the even lines of each frame are drawn alternately.[1][2] With interlaced video, two fields flash back and forth quickly to simulate a full frame. Thus, a 1080i image has two 1920 X 540 fields that are combined to simulate a 1920 X 1080 image. This has been a source of confusion as it is sometimes claimed[citation needed] that 1080i is actually equivalent to 540p. On the contrary, A 540p image has 960 X 540 pixels.
1080i is a high-definition television High-definition television refers to video having resolution substantially higher than traditional television systems (standard-definition TV, or SDTV, or SD). HD has one or two million pixels per frame, roughly five times that of SD. Early HDTV broadcasting used analog techniques, but today HDTV is digitally broadcast using video compression (HDTV) video mode. The term usually assumes a widescreen A widescreen image is a film, computer, or television image with a width to height aspect ratio greater than the standard 1.37:1, Academy Frame aspect ratio aspect ratio The aspect ratio of an image is the ratio of the width of the image to its height, expressed as two numbers separated by a colon. That is, for an x:y aspect ratio, no matter how big or small the image is, if the width is divided into x units of equal length and the height is measured using this same length unit, the height will be measured to be y of 16:9, implying a horizontal resolution of 1920 pixels In digital imaging, a pixel is a single point in a raster image. The pixel is the smallest addressable screen element; it is the smallest unit of picture that can be controlled. Each pixel has its own address. The address of a pixel corresponds to its coordinates. Pixels are normally arranged in a 2-dimensional grid, and are often represented and a frame resolution of 1920×1080 or about 2.07 million pixels.
The field rate The field rate of an interlaced video image is twice the effective frame rate, since interlacing draws only half of the image at a time. For example, a field rate of 60 Hertz will correspond to a 30 frames-per-second moving picture. A field rate can apply to either a video signal, or to a monitor designed to display that signal without conversion of 1080i is typically 60Hz The hertz is the SI unit of frequency defined as the number of cycles per second of a periodic phenomenon. One of its most common uses is the description of sine wave, particularly those used in radio and audio applications for NTSC NTSC, named for the National Television System Committee, is the analog television system used in most of North America, most countries in South America, Burma, South Korea, Taiwan, Japan, Philippines, and some Pacific island nations and territories . NTSC is also the name of the U.S. standardization body that developed the broadcast standard. The countries (such as United States, Canada and Japan) or 50Hz for PAL PAL, short for Phase Alternate Line, is an analogue television encoding system used in broadcast television systems in large parts of the world. Other common analogue television systems are SECAM and NTSC. This page primarily discusses the colour encoding system. See the articles on broadcast television systems and analogue television for/SECAM SECAM, also written SÉCAM , is an analog color television system first used in France. A team led by Henri de France working at Compagnie Française de Télévision (later bought by Thomson) invented SECAM. It is, historically, the first European color television standard regions (such as in Europe, Australia, much of Asia, Africa). Because of this, the two most common frame rates Frame rate, or frame frequency, is the frequency at which an imaging device produces unique consecutive images called frames. The term applies equally well to computer graphics, video cameras, film cameras, and motion capture systems. Frame rate is most often expressed in frames per second (FPS) and in progressive scan monitors as hertz (Hz) are 30 frames per second or 25 frames per second. Both variants can be transmitted by both major digital television Digital television is the transmission of audio and video by discrete (digital) signals, in contrast to the analog signals used by analog TV. It is gradually replacing analog TV, and has done so in several industrialized nations, including the United States and Germany formats, ATSC ATSC is a set of standards developed by the Advanced Television Systems Committee for digital television transmission that replaced much of the analog NTSC television system on June 12, 2009 in the United States and will replace NTSC by August 31, 2011 in Canada and December 31, 2021 in Mexico and DVB Digital Video Broadcasting is a suite of internationally accepted open standards for digital television. DVB standards are maintained by the DVB Project, an international industry consortium with more than 270 members, and they are published by a Joint Technical Committee (JTC) of European Telecommunications Standards Institute (ETSI), European. The frame rate can be implied by the context, while the field rate is generally specified after the letter i, such as "1080i60". In this case 1080i60 refers to 60 fields per second or 30 frames per second. The European Broadcasting Union The European Broadcasting Union (EBU; French: Union européenne de radio-télévision ) is a confederation of 75 broadcasting organisations from 56 countries, and 43 associate broadcasters from a further 25. It is unrelated to the European Union. Members are radio and television companies, most of which are government-owned public service (EBU), prefers to use the resolution and frame rate (not field rate) separated by a slash The slash is a sign, "/", used as punctuation mark and for various other purposes. It is often called a forward slash and many other alternative names, as in 1080i/30 and 1080i/25, likewise 480i/30 and 576i/25.[3] Resolutions of 1080i60 or 1080i50 often refers to 1080i/30 or 1080i/25 in EBU notation.
1080i is directly compatible with CRT The Cathode Ray Tube is a vacuum tube containing an electron gun (a source of electrons) and a fluorescent screen, with internal or external means to accelerate and deflect the electron beam, used to create images in the form of light emitted from the fluorescent screen. The image may represent electrical waveforms (oscilloscope), pictures (-based HDTV sets and is displayed as 1080i, but in LCD and plasma TVs with full 1920x1080 lines, 1080i is displayed without downscaling after being deinterlaced. 1080i is also compatible with newer 720p 720p is the shorthand name for a category of HDTV video modes having a resolution of 1280×720 and a progressive scan. The number 720 stands for the 720 horizontal scan lines of display resolution , while the letter p stands for progressive scan or non-interlaced. When broadcast at 60 frames per second, 720p features the highest temporal (motion)-based televisions, but must be deinterlaced and downscaled to 1366x768 or 1280x720 in order to be displayed on those sets. This can sometimes result in degraded picture quality, depending on the quality of the television's video processor. All signals to LCD/plasma screens are deinterlaced, as these TVs can only display progressive Progressive or noninterlaced scanning is a method for displaying, storing or transmitting moving images in which all the lines of each frame are drawn in sequence. This is in contrast to the interlacing used in traditional television systems where only the odd lines, then the even lines of each frame are drawn alternately formats.
In the United States ^ b. English is the de facto language of American government and the sole language spoken at home by 80% of Americans age five and older. Spanish is the second most commonly spoken language, 1080i is the preferred format for CBS CBS Broadcasting Inc. is a major American television network, which started as a radio network. The name is derived from the initials of the network's former name, Columbia Broadcasting System. The network is sometimes referred to as the "Eye Network" in reference to the shape of the company's logo. It has also been called the ", NBC The National Broadcasting Company is an American television network and former radio network headquartered in the GE Building in New York City's Rockefeller Center with additional major offices in Burbank, California. It is sometimes referred to as the "Peacock Network" due to its stylized peacock logo, created originally for color and The CW The CW Television Network is a television network in the United States launched at the beginning of the 2006–2007 television season. It is a joint venture between CBS Corporation, the former owners of United Paramount Network (UPN), and Time Warner's Warner Bros., former majority owner of The WB Television Network. The "CW" name is, though some affiliates (especially those that broadcast two digital subchannels In broadcasting, digital subchannels are a means to transmit more than one independent program at the same time from the same digital radio or digital television station on the same radio frequency channel. This is done by using data compression techniques to reduce the size of each individual program stream, and multiplexing to combine them into in HD) do broadcast in 720p. Fox Fox Broadcasting Company, commonly referred to as simply Fox, is an American television network owned by Fox Entertainment Group, part of Rupert Murdoch's News Corporation. Launched on October 9, 1986, from 2004 to 2009 Fox was the highest-rated broadcast network in the 18–49 demographic. In the 2007–08 season, Fox became the most popular and ABC The American Broadcasting Company is an American television network. Created in 1943 from the former NBC Blue radio network, ABC is owned by The Walt Disney Company and is part of Disney-ABC Television Group. It first broadcast on television in 1948. Corporate headquarters are in the Upper West Side of Manhattan in New York City, while programming/ESPN Entertainment Sports Programming Network, almost always referred to by its initialism ESPN, is an American cable television network dedicated to broadcasting and producing sports-related programming 24 hours a day broadcast in 720p.
See also
References
- ^ afterdawn.com - 1080i
- ^ CNET CNET Networks Inc. was a media company co-founded in 1993 by Halsey Minor and Shelby Bonnie. CNET was also originally an acronym that originally stood for Computer Networks, but the name was later changed to CNET Networks, and CNET was no longer an acronym. It was acquired by CBS in 2008 and its properties were merged into CBS Interactive - Glossary - 1080i
- ^ "High Definition (HD) Image Formats for Television Production", EBU-TECH 3299, EBU.UER, Geneva, January 2010, page 7
External links
- High Definition (HD) Image Formats for Television Production (EBU The European Broadcasting Union (EBU; French: Union européenne de radio-télévision ) is a confederation of 75 broadcasting organisations from 56 countries, and 43 associate broadcasters from a further 25. It is unrelated to the European Union. Members are radio and television companies, most of which are government-owned public service technical publication)
- 720p vs. 1080p HDTV: The final word - CNET Review - December 5, 2007
|
||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
Categories: Video formats
|
Pocket-lint.com
It supports up to 1080i / 720p HD, and will cost 34.99. Secondly there's the AVerTV Volar H830D Video Capture USB, which adds the ability to capture, ...
Avoid TV Tension and Watch World Cup 2010 on PCs and Laptops with New USB ... TechWhack (press release)
all 2 news articles »
852px x 1136px | 526.00kB
[source page]
Monster Component 1080i
topshoppers
Fri, 04 Jun 2010 01:25:57 GM
Sony HVR-Z1U Professional 3CCD . 1080i. HDV Camcorder:..2500usd. canon eos-1D Mark II-N 8 Megapixel Digital.$900usd. Canon EOS-5D Digital , 12.8 Megapixels...$900usd. Original 2x pioneer cdj-1000MK3 & 1x DJM-800 mixer dj package...$1000 ...
Q. I have a ps3 that I got for christmas. and I was trying to find out what the best looking games for a 1080i tv would be. Any suggestions? I already have Call of duty 4 motocross (the one that came with the ps3) Lair time crisis 4 any others that anyone can think of would be really appreciated. Thanks! and merry christmas.
Asked by Nik - Wed Dec 26 22:04:27 2007 - - 1 Answers - 1 Comments
A. Oblivion looks really sharp.. they redid the graphics when they ported it to the PS3 to take advantage of it's capabilities.. Most games are actually native 720p.. you might want to try switching back and forth from 1080i and 720p to see which one looks better for you on your television.. Good luck..
Answered by TeknoKid - Sat Dec 29 00:36:16 2007
