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151-398: IMAX is a proprietary system of high-resolution cameras , film formats , film projectors , and theaters known for having very large screens with a tall aspect ratio (approximately either 1.43:1 or 1.90:1 ) and steep stadium seating , with the 1.43:1 ratio format being available only in few selected locations. Graeme Ferguson , Roman Kroitor , Robert Kerr , and William C. Shaw were

302-412: A compressed air "puffer" to accelerate the film, and put a cylindrical lens in the projector's "aperture block". The rolling loop mechanism is used to move the film in projectors and cameras; the sprockets in the film are only used for registration as the film is too large to be moved with sprockets at the necessary speeds for projection and filming without damage. The projector uses a vacuum to pull

453-409: A felt or brush-like material that wipes dust off the lens as it moves up or down. The projector uses a vacuum to keep the film flat and oriented correctly for projection. The shutter of an IMAX projector is also kept open for longer than a 35 mm projector shutter to increase image brightness. IMAX projectors are pin -stabilized; this means that four registration pins engage the perforations at

604-416: A letterbox view of the image, again with correct proportions. The EU defines HD resolution as 1920 x 1080 pixels or 2 073 600 pixels and UHD resolution as 3840 x 2160 pixels or 8 294 400 pixels. Note: Image is either a frame or, in case of interlaced scanning, two fields (EVEN and ODD). Also, there are less common but still popular UltraWide resolutions, such as 2560×1080p (1080p UltraWide). There

755-428: A numeronym . For example, "i18n" abbreviates " internationalization ", a computer-science term for adapting software for worldwide use; the "18" represents the 18 letters that come between the first and the last in "internationalization". Similarly, "localization" can be abbreviated "l10n"; " multilingualization " "m17n"; and " accessibility " "a11y". In addition to the use of a specific number replacing that many letters,

906-645: A single word ("television" or "transvestite", for instance), and is in general spelled without punctuation (except in the plural). Although "PS" stands for the single English word " postscript " or the Latin postscriptum , it is often spelled with periods ("P.S.") as if parsed as Latin post scriptum instead. The slash ('/', or solidus ) is sometimes used to separate the letters in an acronym, as in "N/A" ("not applicable, not available") and "c/o" ("care of"). Inconveniently long words used frequently in related contexts can be represented according to their letter count as

1057-463: A 6 MHz broadcast channel were mostly unsuccessful. All attempts at using this format for terrestrial TV transmission were abandoned by the mid-1990s. Europe developed HD-MAC (1,250 lines, 50 Hz), a member of the MAC family of hybrid analogue/digital video standards; however, it never took off as a terrestrial video transmission format. HD-MAC was never designated for video interchange except by

1208-844: A Barco DP4K-32B 4K projection system in 2013), the Omni-Theatre at Science Centre Singapore , the National Museum of Natural Science in Taichung , Taiwan (which both had their original IMAX Dome 1570 projection systems installed respectively in 1987 and 1985 replaced with Evans & Sutherland Digistar 5 8K digital systems in 2015), and the Jennifer Chalsty Planetarium at Liberty Science Center in Jersey City , New Jersey , which replaced its IMAX Dome 1570 projection system from 1993 (when built

1359-490: A Swiss conference in 1983. The NHK system was standardized in the United States as Society of Motion Picture and Television Engineers (SMPTE) standard #240M in the early 1990s, but abandoned later on when it was replaced by a DVB analog standard. HighVision video is still usable for HDTV video interchange, but there is almost no modern equipment available to perform this function. Attempts at implementing HighVision as

1510-474: A contract to develop and manufacture a fisheye lens projection system optimized to project an image onto a dome instead of a flat screen. The dome system, which the San Diego Hall of Science called "Omnimax", uses films shot with a camera equipped with a fisheye lens that squeezes a highly distorted anamorphic 180° field of view onto the 65 mm IMAX film. The lens is aligned below the center of

1661-471: A decoding method such as DTS . The new generation of IMAX with Laser Projectors use IMAX 12-channel sound while 15/70 and Xenon Projectors use IMAX 6-channel. Like conventional theatres, IMAX theatres place speakers both directly behind the acoustically transparent screen, and around the theatre to create a "surround sound" effect. IMAX also provides a "top center" speaker in addition to the centre speaker found in conventional theatres. This extra channel allows

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1812-680: A different meaning. Medical literature has been struggling to control the proliferation of acronyms, including efforts by the American Academy of Dermatology. Acronyms are often taught as mnemonic devices: for example the colors of the rainbow are ROY G. BIV (red, orange, yellow, green, blue, indigo, violet). They are also used as mental checklists: in aviation GUMPS stands for gas-undercarriage-mixture-propeller-seat belts. Other mnemonic acronyms include CAN SLIM in finance, PAVPANIC in English grammar, and PEMDAS in mathematics. It

1963-619: A digital projection system, which it has not given a distinct name or brand, designed for multiplex theatres with screens no wider than 21.3 m (70 ft). All IMAX projectors, except the standard GT system, can project 3D images . GT 3D projectors require two separate lamps and polarized projection optics. The digital cinema IMAX projection system, debuted in 2008, is designed for use with shorter 1.89:1 aspect ratio screens. The system uses two 2K projectors that can present either 2D or 3D content in DCI or IMAX Digital Format (IDF; which in itself

2114-414: A goal to deploy the first four units in the next two years. Christopher Nolan and Jordan Peele are among a group of advisors, made up of filmmakers and cinematographers, assisting in identifying new specs and features for the prototype development phase. In a May 2024 interview with Collider , IMAX CEO Richard Gelfond revealed that there will be four new identical cameras that will be 30% quieter than

2265-518: A half-pixel offset, using super-resolution imaging , which makes the perceived resolution greater than 4K. In-theater cameras and microphones are used to automatically calibrate the projectors and sound system between showings. For 3D presentations, one projector is used to display the image for each eye, while 2D presentations use the superimposed images to allow for a brighter image. For 3D presentations, IMAX with Laser systems use dichroic filter glasses, similar to those used by Dolby 3D , as opposed to

2416-460: A higher resolution format, but removing the interlace to match the common 720p format may distort the picture or require filtering which actually reduces the resolution of the final output. Non-cinematic HDTV video recordings are recorded in either the 720p or the 1080i format. The format used is set by the broadcaster (if for television broadcast). In general, 720p is more accurate with fast action, because it progressively scans frames, instead of

2567-458: A key patent filed on January 16, 1970, was assigned under the original name Multiscreen Corporation, Limited. IMAX Chief Administration Officer Mary Ruby was quoted as saying, "Although many people may think 'IMAX' is an acronym , it is, in fact, a made-up word." Tiger Child , the first IMAX film, was demonstrated at Expo '70 in Osaka, Japan . The first permanent IMAX installation was built at

2718-781: A medial decimal point . Particularly in British and Commonwealth English , all such punctuation marking acronyms and other capitalized abbreviations is now uncommon and considered either unnecessary or incorrect. The presence of all-capital letters is now thought sufficient to indicate the nature of the UK , the EU , and the UN . Forms such as the U.S.A. for "the United States of America " are now considered to indicate American or North American English . Even within those dialects, such punctuation

2869-493: A medium has inherent limitations, such as difficulty of viewing footage while recording, and suffers other problems, caused by poor film development/processing, or poor monitoring systems. Given that there is increasing use of computer-generated or computer-altered imagery in movies, and that editing picture sequences is often done digitally, some directors have shot their movies using the HD format via high-end digital video cameras. While

3020-466: A momentarily-paused still image. This requires a mechanical apparatus to buffer the jerky travel of the film strip. The older technology of running 70 mm film vertically through the projector used only five sprocket perforations on the sides of each frame; however, the IMAX method used fifteen perforations per frame. The previous mechanism was inadequate to handle this intermittent mechanical movement that

3171-407: A period when the letters are pronounced individually, as in " K.G.B. ", but not when pronounced as a word, as in " NATO ". The logic of this style is that the pronunciation is reflected graphically by the punctuation scheme. When a multiple-letter abbreviation is formed from a single word, periods are in general not used, although they may be common in informal usage. "TV", for example, may stand for

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3322-608: A pressure of about 25 atmospheres (367 psi (2,530 kPa)). Because of this, projectionists are required to wear protective body armor when changing or handling the lamp in case it breaks (e.g., due to a drop to the floor) because of the danger from flying quartz shards propelled by the high pressure of the xenon gas within; this applies to all projection xenon lamps. An IMAX xenon lamp runs on DC power, lasts for 1,000 hours and requires its own pump and water cooler. The projector's optics also require compressed air cooling. An IMAX projector weighs up to 1.8 tonnes (2 short tons ) and

3473-458: A process known as IMAX HD . Depending upon available bandwidth and the amount of detail and movement in the image, the optimum format for video transfer is either 720p24 or 1080p24. When shown on television in PAL system countries, film must be projected at the rate of 25 frames per second by accelerating it by 4.1 percent. In NTSC standard countries, the projection rate is 30 frames per second, using

3624-543: A quarter of those having the capability to show 70mm film at the resolution of the large format as originally conceived. The IMAX cinema process increases the image resolution by using a larger film frame; in relative terms, a frame of IMAX format film has three times the theoretical horizontal resolution of a frame of 35 mm film . To achieve such increased image resolution, which IMAX estimates at approximately 12,000 lines (6,000 line pair modulations) of horizontal resolution (18K), 65 mm film stock passes horizontally through

3775-499: A resolution. For example, 24p means 24 progressive scan frames per second and 50i means 25 progressive frames per second, consisting of 50 interlaced fields per second. Most HDTV systems support some standard resolutions and frame or field rates. The most common are noted below. High-definition signals require a high-definition television or computer monitor in order to be viewed. High-definition video has an aspect ratio of 16:9 (1.78:1). The aspect ratio of regular widescreen film shot today

3926-610: A screen measuring 693 square meters 31.2 by 22.2 m (102 by 73 ft) within The Ribbon building, after years of extensive redevelopment, making it the world's third-largest screen. In the late-1960s, the San Diego Hall of Science (later known as the San Diego Space and Science Foundation) began searching North America for a large-format film system to project on the dome of their planned 23.16 m (76.0 ft) tilted dome planetarium . The standard IMAX projector

4077-436: A single word, such as NATO (as distinct from B-B-C )" but adds later "In everyday use, acronym is often applied to abbreviations that are technically initialisms, since they are pronounced as separate letters." The Chicago Manual of Style acknowledges the complexity ("Furthermore, an acronym and initialism are occasionally combined (JPEG), and the line between initialism and acronym is not always clear") but still defines

4228-440: A technique called 3:2 pull-down. One film frame is held for three video fields (1/20 of a second), and the next is held for two video fields (1/30 of a second) and then the process is repeated, thus achieving the correct film projection rate with two film frames shown in one twelfth of a second. Older (pre-HDTV) recordings on video tape such as Betacam SP are often either in the form 480i60 or 576i50. These may be upconverted to

4379-515: A twentieth-century phenomenon. Linguist David Wilton in Word Myths: Debunking Linguistic Urban Legends claims that "forming words from acronyms is a distinctly twentieth- (and now twenty-first-) century phenomenon. There is only one known pre-twentieth-century [English] word with an acronymic origin and it was in vogue for only a short time in 1886. The word is colinderies or colinda , an acronym for

4530-471: A word, an abbreviation is not an acronym." In contrast, some style guides do support it, whether explicitly or implicitly. The 1994 edition of Merriam-Webster's Dictionary of English Usage defends the usage on the basis of a claim that dictionaries do not make a distinction. The BuzzFeed style guide describes CBS and PBS as "acronyms ending in S". Acronymy, like retronymy , is a linguistic process that has existed throughout history but for which there

4681-488: Is a question about how to pluralize acronyms. Often a writer will add an 's' following an apostrophe, as in "PC's". However, Kate L. Turabian 's A Manual for Writers of Research Papers, Theses, and Dissertations , writing about style in academic writings, allows for an apostrophe to form plural acronyms "only when an abbreviation contains internal periods or both capital and lowercase letters". Turabian would therefore prefer "DVDs" and "URLs" but "Ph.D.'s". The style guides of

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4832-462: Is a superset of DCI). IDF initially used 2K-resolution Christie xenon projectors, with a Texas Instruments Digital Light Processing (DLP) engine, but in 2012 IMAX announced that they would be switching to Barco as their primary supplier. The two 2K images are projected superimposed on each other with a half-pixel offset, using super-resolution imaging to increase the perceived resolution to approximately 2.9K. For 3D presentations, one projector

4983-594: Is acute for surveillance purposes to ensure that the quality of the video output is of an acceptable standard that can be used both for preventative surveillance as well as for evidence purposes. Although, HD cameras can be highly effective indoor, special industries with outdoor environments called for a need to produce much higher resolutions for effective coverage. The ever-evolving image sensor technologies allowed manufacturers to develop cameras with 10-20 MP resolutions, which therefore have become efficient instruments to monitor larger areas. In order to further increase

5134-637: Is also a WQHD+ option for some of these. High-definition image sources include terrestrial broadcast, direct broadcast satellite, digital cable, high definition disc ( BD ), digital cameras, Internet downloads, and video game consoles. Blu-ray Discs were jointly developed by 9 initial partners including Sony and Phillips (which jointly developed CDs for audio), and Pioneer (which developed its own Laser-disc previously with some success) among others. HD DVD discs were primarily developed by Toshiba and NEC with some backing from Microsoft, Warner Bros., Hewlett Packard, and others. On February 19, 2008, Toshiba announced it

5285-598: Is an unusual case, due to its hybrid nature as both a home console and a handheld: the built-in screen displays games at 720p maximum, but the console can natively display imagery at 1080p when docked. The Xbox One X and PlayStation 4 Pro can display some games in 4K. The PlayStation 5 and Xbox Series X can display games in 4K and 8K. Generally, PC games are only limited by the display's resolution and GPU driver support. Some PC hardware supports DisplayPort 2.1 for native 8k resolution at high refresh rates. Ultrawide monitors are supported, which can display more of

5436-721: Is becoming increasingly uncommon. Some style guides , such as that of the BBC , no longer require punctuation to show ellipsis ; some even proscribe it. Larry Trask , American author of The Penguin Guide to Punctuation , states categorically that, in British English , "this tiresome and unnecessary practice is now obsolete." Nevertheless, some influential style guides , many of them American , still require periods in certain instances. For example, The New York Times Manual of Style and Usage recommends following each segment with

5587-411: Is common for grammatical contractions (e.g. don't , y'all , and ain't ) and for contractions marking unusual pronunciations (e.g. a'ight , cap'n , and fo'c'sle for "all right", "captain", and "forecastle"). By the early twentieth century, it was standard to use a full stop/period/point , especially in the cases of initialisms and acronyms. Previously, especially for Latin abbreviations , this

5738-631: Is especially important for paper media, where no search utility is available to find the first use.) It also gives students a convenient review list to memorize the important acronyms introduced in a textbook chapter. Expansion at first use and abbreviation keys originated in the print era, but they are equally useful for electronic text . While acronyms provide convenience and succinctness for specialists, they often degenerate into confusing jargon . This may be intentional, to exclude readers without domain-specific knowledge. New acronyms may also confuse when they coincide with an already existing acronym having

5889-422: Is fed through the projector horizontally, and the film is drawn from the inner circumference of the platter, not from the outer circumference like in conventional film reels. A system is in place to keep the film in the outer circumference from flying outwards due to centrifugal force while the platter is spinning. IMAX film is shipped to theaters in several small reels that are spliced into one continuous length that

6040-596: Is formed from the Greek roots akro- , meaning 'height, summit, or tip', and -nym , 'name'. This neoclassical compound appears to have originated in German , with attestations for the German form Akronym appearing as early as 1921. Citations in English date to a 1940 translation of a novel by the German writer Lion Feuchtwanger . It is an unsettled question in English lexicography and style guides whether it

6191-464: Is generally said as two letters, but IPsec for Internet Protocol Security is usually pronounced as / ˌ aɪ ˈ p iː s ɛ k / or / ˈ ɪ p s ɛ k / , along with variant capitalization like "IPSEC" and "Ipsec". Pronunciation may even vary within a single speaker's vocabulary, depending on narrow contexts. As an example, the database programming language SQL is usually said as three letters, but in reference to Microsoft's implementation

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6342-446: Is its original meaning and in common use. Dictionary and style-guide editors dispute whether the term acronym can be legitimately applied to abbreviations which are not pronounced as words, and they do not agree on acronym spacing , casing , and punctuation . The phrase that the acronym stands for is called its expansion . The meaning of an acronym includes both its expansion and the meaning of its expansion. The word acronym

6493-550: Is legitimate to use the word acronym to describe forms that use initials but are not pronounced as a word. While there is plenty of evidence that acronym is used widely in this way, some sources do not acknowledge this usage, reserving the term acronym only for forms pronounced as a word, and using initialism or abbreviation for those that are not. Some sources acknowledge the usage, but vary in whether they criticize or forbid it, allow it without comment, or explicitly advocate it. Some mainstream English dictionaries from across

6644-702: Is less than half. Due to protests, the City of Spokane officials decided to work with the IMAX Corporation to demolish the theatre, under the condition they renovate the former US Pavilion itself into IMAX's first permanent outdoor giant-screen theatre. The plan was to use material on the inside of the structure similar to that used when first constructed. However, it was expected to last only five years, due to weather conditions destroying previous materials. Concept art has been released in videos featured on Spokane's renovation site, and its budget revealed that seating

6795-459: Is not uncommon for acronyms to be cited in a kind of false etymology , called a folk etymology , for a word. Such etymologies persist in popular culture but have no factual basis in historical linguistics , and are examples of language-related urban legends . For example, " cop " is commonly cited as being derived, it is presumed, from "constable on patrol", and " posh " from " port outward, starboard home ". With some of these specious expansions,

6946-411: Is over 178 cm (5.8 ft) tall and 195 cm (6.4 ft) long. The projector is raised and locked into position before each screening. IMAX Corporation has released four projector types that use its 15-perforation, 70 mm film format: GT (Grand Theatre), GT 3D (dual rotor), SR (Small Rotor), and MPX , which was designed for retrofitted theatres. In July 2008, the company introduced

7097-650: Is planned for more than 2,000. The first permanent IMAX Dome installation, the Eugene Heikoff and Marilyn Jacobs Heikoff Dome Theatre at the Reuben H. Fleet Science Center , opened in San Diego 's Balboa Park in 1973. It doubles as a planetarium theater. The first permanent IMAX 3D theatre was built in Vancouver , British Columbia, for Transitions at Expo '86 , and was in use until September 30, 2009. It

7248-621: Is then wound into a platter, a process that may take hours to complete. Films may be several kilometers in length: Avatar , which was 2:45 hours in duration, was close to 16 km (9.9 mi) long. Platters are handled using special forklifts. IMAX platters range from 1.2 to 1.83 m (3.9 to 6.0 ft) diameter to accommodate 1 to 2.75 hours of film. Platters with a 2.5 hour feature film weigh 250 kg (550 lb). IMAX uses ESTAR-based print film in their 15/70 rolling-loop film projection systems. ESTAR-based print film provides greater precision. The chemical development process does not change

7399-415: Is traditionally pronounced like the word sequel . In writing for a broad audience, the words of an acronym are typically written out in full at its first occurrence within a given text. Expansion At First Use (EAFU) benefits readers unfamiliar with the acronym. Another text aid is an abbreviation key which lists and expands all acronyms used, a reference for readers who skipped past the first use. (This

7550-425: Is typically 1.85:1 or 2.39:1 (sometimes traditionally quoted at 2.35:1). Standard-definition television (SDTV) has a 4:3 (1.33:1) aspect ratio, although in recent years many broadcasters have transmitted programs squeezed horizontally in 16:9 anamorphic format , in hopes that the viewer has a 16:9 set which stretches the image out to normal-looking proportions, or a set which squishes the image vertically to present

7701-400: Is used to display the image for each eye, while 2D presentations use the superimposed images to allow for a brighter 75 cd/m image. The Digital IMAX projection system includes a proprietary IMAX Image Enhancer that modifies the output of the digital media server based on feedback from cameras and microphones in the auditorium, and maintains alignment with sub-pixel accuracy. Mainly because

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7852-626: The Advanced Television Systems Committee (ATSC) adopted a range of standards from interlaced 1,080-line video (a technical descendant of the original analog NHK 1125/30 Hz system) with a maximum frame rate of 30 Hz, (60 fields per second) and 720-line video, progressively scanned, with a maximum frame rate of 60 Hz. In the end, however, the DVB standard of resolutions (1080, 720, 480) and respective frame rates (24, 25, 30) were adopted in conjunction with

8003-519: The Cinerama process in the mid-1950s. By the early 1990s, a separate DTS -based 6-track digital sound system was used, similarly locked to the projector by a SMPTE time code synchronization apparatus, the audio played off a series of proprietarily encoded CD-ROM discs. In the late 1990s, IMAX upgraded this system to use a hard drive that carries a single uncompressed audio file. These are converted directly to analogue rather than processed through

8154-691: The Cinesphere theatre at Ontario Place in Toronto. It debuted in May 1971, showing the film North of Superior . The installation remained in place during Ontario Place's hiatus for redevelopment. The Cinesphere was renovated while Ontario Place was closed and re-opened on November 3, 2017, with IMAX 70 mm and IMAX with laser illumination. During Expo '74 in Spokane, Washington , an IMAX screen that measured 27 by 20 metres (89 ft × 66 ft)

8305-516: The Colonial and Indian Exposition held in London in that year." However, although acronymic words seem not to have been employed in general vocabulary before the twentieth century (as Wilton points out), the concept of their formation is treated as effortlessly understood (and evidently not novel) in an Edgar Allan Poe story of the 1830s, " How to Write a Blackwood Article ", which includes

8456-523: The Digital Cinema Initiatives spec, a contrast ratio "double" that of IMAX 15/70 mm film projection and "higher" than the 2,500:1 contrast ratio of IMAX's xenon lamp-based projection systems, and displaying the full Rec. 2020 color gamut. The system also features a new 12-channel surround sound system, which adds an additional speaker on either side of the theater as well as four new overhead speakers. While still not matching

8607-525: The European Broadcasting Union . High-definition digital video was not possible with uncompressed video due to impractically high memory and bandwidth requirements, with a bit rate exceeding 1  Gbit/s for 1080p video. Digital HDTV was enabled by the development of discrete cosine transform (DCT) video compression . The DCT is a lossy compression technique that was first proposed by Nasir Ahmed in 1972, and

8758-623: The Modern Language Association and American Psychological Association prohibit apostrophes from being used to pluralize acronyms regardless of periods (so "compact discs" would be "CDs" or "C.D.s"), whereas The New York Times Manual of Style and Usage requires an apostrophe when pluralizing all abbreviations regardless of periods (preferring "PC's, TV's and VCR's"). Possessive plurals that also include apostrophes for mere pluralization and periods appear especially complex: for example, "the C.D.'s' labels" (the labels of

8909-644: The PlayStation 3 the Xbox 360 game consoles can output native 1080p through HDMI or component cables, but the systems have few games which appear in 1080p; most games only run natively at 720p or less but can be upscaled to 1080p. Visually, native 1080p produces a sharper and clearer picture compared to upscaled 1080p. The Wii does not support HD. In the 8th generation , Nintendo's Wii U and Nintendo Switch , Microsoft's Xbox One , and Sony's PlayStation 4 display games 1080p natively. The Nintendo Switch

9060-539: The Restoration witticism arranging the names of some members of Charles II 's Committee for Foreign Affairs to produce the "CABAL" ministry . OK , a term of disputed origin, dates back at least to the early nineteenth century and is now used around the world. Acronyms are used most often to abbreviate names of organizations and long or frequently referenced terms. The armed forces and government agencies frequently employ acronyms; some well-known examples from

9211-568: The TF1 network. Modern HD specifications date to the early 1980s, when Japanese engineers developed the HighVision 1,125-line interlaced TV standard (also called MUSE ) that ran at 60 frames per second. The Sony HDVS system was presented at an international meeting of television engineers in Algiers , April 1981 and Japan's NHK presented its analog high-definition television (HDTV) system at

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9362-678: The linear polarization glasses used in Digital IMAX theaters. On April 24, 2018, IMAX announced that they would begin rolling out a new single-unit version of their laser projector system later that year, with this iteration designed to replace the IMAX Xenon digital projection system for 1.89:1 screens. IMAX theatres are described as either "Classic Design" (purpose-built structures), or "Multiplex Design" (retrofitted auditoriums). Classic IMAX theatre construction differs significantly from conventional theatres. The increased resolution lets

9513-480: The "belief" that the etymology is acronymic has clearly been tongue-in-cheek among many citers, as with "gentlemen only, ladies forbidden" for " golf ", although many other (more credulous ) people have uncritically taken it for fact. Taboo words in particular commonly have such false etymologies: " shit " from "ship/store high in transit" or "special high-intensity training" and " fuck " from "for unlawful carnal knowledge", or "fornication under consent/command of

9664-420: The 1080i, which uses interlaced fields and thus might degrade the resolution of fast images. 720p is used more for Internet distribution of high-definition video, because computer monitors progressively scan; 720p video has lower storage-decoding requirements than either the 1080i or the 1080p. This is also the medium for high-definition broadcasts around the world and 1080p is used for Blu-ray movies. Film as

9815-463: The 160-character SMS limit, and to save time, acronyms such as "GF" ("girlfriend"), "LOL" ("laughing out loud"), and "DL" ("download" or "down low") have become popular. Some prescriptivists disdain texting acronyms and abbreviations as decreasing clarity, or as failure to use "pure" or "proper" English. Others point out that languages have always continually changed , and argue that acronyms should be embraced as inevitable, or as innovation that adapts

9966-461: The 18 letters between the initial "i" and the final "n"). Authors of expository writing will sometimes capitalize or otherwise distinctively format the initials of the expansion for pedagogical emphasis (for example, writing: "the onset of Congestive Heart Failure (CHF)" or "the onset of c ongestive h eart f ailure (CHF)"). Capitalization like this, however, conflicts with the convention of English orthography, which generally reserves capitals in

10117-445: The 2000s) continue to call it "Omnimax". IMAX Dome theatres are used in theme parks and many North American museums, particularly those with a scientific focus, where the technical aspects of the system may be highlighted as part of the attraction. The projection room is often windowed to allow public viewing of the equipment in operation, and it is often accompanied by informational placards like other exhibits. For some theaters, before

10268-475: The Arri Alexa IMAX on Avengers: Infinity War (2018) and Avengers: Endgame (2019). For Transformers: The Last Knight , two ARRI Alexa IMAX cameras were combined in a rig to provide native 3D, with the film containing 98% of IMAX footage. In September 2020, IMAX launched the "Filmed for IMAX" program, which certifies high-quality digital cameras that can be used to create IMAX-format films. As

10419-795: The Arri Alexa LF and Mini LF), Black Panther: Wakanda Forever (shot with the Sony CineAlta Venice), Guardians of the Galaxy Vol. 3 (shot with the Red V-Raptor), The Marvels (shot with the Arri Alexa LF and Mini LF) and Dune: Part Two (shot with the Arri Alexa LF and Mini LF). The IMAX format is generically called "15/70" film, the name referring to the 15 sprocket holes or perforations per frame. The film's bulk and weight require horizontal platters, rather than conventional vertically mounted film reels. IMAX film

10570-466: The British press may render it "Nato"), but uses lower case in " Unicef " (from "United Nations International Children's Emergency Fund") because it is more than four letters, and to style it in caps might look ungainly (flirting with the appearance of "shouting capitals"). While abbreviations typically exclude the initials of short function words (such as "and", "or", "of", or "to"), this is not always

10721-906: The Charlotte Observer IMAX Dome Theatre at Discovery Place , Charlotte, North Carolina; Birmingham, Alabama's McWane Science Center ; US Space and Rocket Center in Huntsville, Alabama; the Cincinnati Museum Center at Union Terminal ; the Great Lakes Science Center in Cleveland, Ohio; the Ontario Science Centre in Toronto, Ontario; and Science World in Vancouver, British Columbia. Alternatively,

10872-988: The Chocolate Factory at the Oregon Museum of Science and Industry . The largest screen in North America is at the Science World in Vancouver, British Columbia, which has a dome screen 27 metres (89 ft) in size. Due to the age of the IMAX Dome format as well as its entirely analogue nature, some theatres may opt to replace their existing IMAX Dome systems with newer, more versatile digital systems. Examples of former IMAX Dome theatres that have had their IMAX equipment replaced with newer equipment include Tietomaa Science Centre in Oulu , Finland (which replaced its IMAX 8/70 equipment from 1988 with

11023-844: The English-speaking world affirm a sense of acronym which does not require being pronounced as a word. American English dictionaries such as Merriam-Webster , Dictionary.com's Random House Webster's Unabridged Dictionary and the American Heritage Dictionary as well as the British Oxford English Dictionary and the Australian Macquarie Dictionary all include a sense in their entries for acronym equating it with initialism , although The American Heritage Dictionary criticizes it with

11174-525: The Europeans that were also involved in the same standardization process. The FCC officially adopted the ATSC transmission standard in 1996 (which included both HD and SD video standards). In the early 2000s, it looked as if DVB would be the video standard far into the future. However, both Brazil and China have adopted alternative standards for high-definition video that preclude the interoperability that

11325-436: The IMAX movie camera, 15 perforations at a time. At 24 frames per second, this means that the film moves through the camera at 102.7 meters (337 ft) per minute (just over 6 km/h). In a conventional 65 mm camera, the film passes vertically through the camera, five perforations at a time, or 34 meters (112 ft) per minute. In comparison, in a conventional 35 mm camera, 35 mm film passes vertically through

11476-846: The Leonberg IMAX opened in 2021, the largest operating IMAX screen was in IMAX Melbourne , located within the Melbourne Museum in Melbourne , Australia, measuring 32 m × 23 m (105 ft × 75 ft). Until its demolition in 2016, the world's largest IMAX screen had been in IMAX Sydney in Darling Harbour , Sydney , Australia, measuring 35.72 m × 29.57 m (117.2 ft × 97.0 ft). It reopened on 12 October 2023, with

11627-768: The Red Ranger Monstro and Komodo), Shang-Chi and the Legend of the Ten Rings (shot with the Arri Alexa LF and Mini LF), The Battle at Lake Changjin and The Battle at Lake Changjin II (shot with the Red Ranger Monstro), Eternals (shot with the Arri Alexa LF and Mini LF), Doctor Strange in the Multiverse of Madness (shot with Panavision Millennium DXL2), Thor: Love and Thunder (shot with

11778-522: The Techniscope 2 perforation format. Movies are also produced using other film gauges , including 70 mm films (22 mm × 48 mm) or the rarely used 55 mm and CINERAMA . The four major film formats provide pixel resolutions (calculated from pixels per millimeter) roughly as follows: In the process of making prints for exhibition, this negative is copied onto other film (negative → interpositive → internegative → print) causing

11929-564: The U.S. Navy, is "COMCRUDESPAC", which stands for "commander, cruisers destroyers Pacific"; it is also seen as "ComCruDesPac". Inventors are encouraged to anticipate the formation of acronyms by making new terms "YABA-compatible" ("yet another bloody acronym"), meaning the term's acronym can be pronounced and is not an offensive word: "When choosing a new name, be sure it is 'YABA-compatible'." Acronym use has been further popularized by text messaging on mobile phones with short message service (SMS), and instant messenger (IM). To fit messages into

12080-497: The United States are among the " alphabet agencies " (jokingly referred to as " alphabet soup ") created under the New Deal by Franklin D. Roosevelt (himself known as "FDR"). Business and industry also coin acronyms prolifically. The rapid advance of science and technology also drives the usage, as new inventions and concepts with multiword names create a demand for shorter, more pronounceable names. One representative example, from

12231-411: The acronym may use normal case rules, e.g. it would appear generally in lower case, but with an initial capital when starting a sentence or when in a title. Once knowledge of the words underlying such an acronym has faded from common recall, the acronym may be termed an anacronym . Examples of anacronyms are the words " scuba ", " radar ", and " laser ". The word "an acro nym" should not be confused with

12382-590: The adoption of acronyms was modern warfare, with its many highly technical terms. While there is no recorded use of military acronyms dating from the American Civil War (acronyms such as "ANV" for " Army of Northern Virginia " post-date the war itself), they became somewhat common in World War I , and by World War II they were widespread even in the slang of soldiers, who referred to themselves as G.I.s . The widespread, frequent use of acronyms across

12533-506: The apostrophe should be reserved for the possessive ("the TV's antenna"). In some languages, the convention of doubling the letters in the acronym is used to indicate plural words: for example, the Spanish EE.UU. , for Estados Unidos ('United States'). This old convention is still sometimes followed for a limited number of English abbreviations, such as SS. for Saints , pp. for

12684-490: The audience be much closer to the screen. Typically all rows are within one screen height – conventional theatre seating runs 8 to 12-screen heights. Also, the rows of seats are set at a steep angle (up to 30° in some domed theatres) so that the audience is facing the screen directly. The world's largest IMAX screen currently stands in Leonberg near Stuttgart , Germany and measures 38 by 22 m (125 by 72 ft). Until

12835-546: The camera, at four (smaller) perforations at a time, which translates to 27.4 meters (90 ft) per minute. In the Todd-AO 70 mm-format of widescreen cinema, the image area of a 65 mm film-frame is 48.5 mm × 22.1 mm (1.91 in × 0.87 in); in the IMAX-format of widescreen cinema, the film-frame dimensions are 69.6 mm × 48.5 mm (2.74 in × 1.91 in). To match

12986-1163: The case. Sometimes function words are included to make a pronounceable acronym, such as CORE ( Congress of Racial Equality ). Sometimes the letters representing these words are written in lower case, such as in the cases of "TfL" (" Transport for London ") and LotR ( The Lord of the Rings ); this usually occurs when the acronym represents a multi-word proper noun. Numbers (both cardinal and ordinal ) in names are often represented by digits rather than initial letters, as in "4GL" (" fourth generation language ") or "G77" (" Group of 77 "). Large numbers may use metric prefixes , as with " Y2K " for "Year 2000". Exceptions using initials for numbers include " TLA " ("three-letter acronym/abbreviation") and "GoF" (" Gang of Four "). Abbreviations using numbers for other purposes include repetitions, such as " A2DP " ("Advanced Audio Distribution Profile"), " W3C " ("World Wide Web Consortium"), and T3 ( Trends, Tips & Tools for Everyday Living ); pronunciation, such as " B2B " ("business to business"); and numeronyms , such as "i18n" ("internationalization"; "18" represents

13137-685: The co-founders of what would be named the IMAX Corporation (founded in September 1967 as Multiscreen Corporation, Ltd.), and they developed the first IMAX cinema projection standards in the late 1960s and early 1970s in Canada . IMAX GT is the premium large format. The digital format uses dual laser projectors, which can show 1.43 digital content when combined with a 1.43 screen. The film format uses very large screens of 18 by 24 metres (59 by 79 feet) and, unlike most conventional film projectors,

13288-413: The compact discs). In some instances, however, an apostrophe may increase clarity: for example, if the final letter of an abbreviation is "S", as in "SOS's" (although abbreviations ending with S can also take "-es", e.g. "SOSes"), or when pluralizing an abbreviation that has periods. A particularly rich source of options arises when the plural of an acronym would normally be indicated in a word other than

13439-417: The company was] September 1967. ... [The name change] came a year or two later. We first called the company Multiscreen Corporation because that, in fact, was what people knew us as. ... After about a year, our attorney informed us that we could never copyright or trademark Multivision. It was too generic. It was a descriptive word. The words that you can copyright are words like Kleenex or Xerox or Coca-Cola. If

13590-564: The contrived acronym "P.R.E.T.T.Y.B.L.U.E.B.A.T.C.H." The use of Latin and Neo-Latin terms in vernaculars has been pan-European and pre-dates modern English. Some examples of acronyms in this class are: The earliest example of a word derived from an acronym listed by the OED is "abjud" (now " abjad "), formed from the original first four letters of the Arabic alphabet in the late eighteenth century. Some acrostics pre-date this, however, such as

13741-430: The corners of the projected frame to ensure perfect alignment. Shaw added cam -controlled arms to decelerate each frame to eliminate the microscopic shaking as the frame "settled" onto the registration pins. The projector's shutter is open around 20% longer than in conventional equipment, and the light source is brighter. The xenon short-arc lamps are made with a thin envelope of fused quartz and contain xenon gas at

13892-659: The derogatory name "LieMAX", particularly because the company still marketed the new screens similarly to the old ones, without making the major differences clear to the public, going so far as to market the smallest "IMAX" screen, having 10 times less area, similarly to the largest while persisting with the same brand name. Since 2002, some feature films have been converted into IMAX format for displaying in IMAX theatres, and some have also been (partially) shot in IMAX. By late 2017, 1,302 IMAX theatre systems were installed in 1,203 commercial multiplexes, 13 commercial destinations, and 86 institutional settings in 75 countries, with less than

14043-438: The dictionary entries and style guide recommendations regarding the term acronym through the twentieth century did not explicitly acknowledge or support the expansive sense. The Merriam–Webster's Dictionary of English Usage from 1994 is one of the earliest publications to advocate for the expansive sense, and all the major dictionary editions that include a sense of acronym equating it with initialism were first published in

14194-680: The dome may be lowered and raised as needed, such as at the Science Museum of Minnesota , and the former installation at the Canadian Museum of History (where it shared an auditorium with a standard IMAX screen, all replaced with a Barco CINE+ digital theatre system in 2016). The entire dome could be raised to show flat-screen features, and repositioned for immersive features. While the majority of museum installations focus on educational and documentary films, on special occasions entertainment films are also shown, such as Charlie and

14345-580: The early 1990s, DCT video compression had been widely adopted as the video coding standard for HDTV. The current high-definition video standards in North America were developed during the course of the advanced television process initiated by the Federal Communications Commission in 1987 at the request of American broadcasters. In essence, the end of the 1980s was a death knell for most analog high definition technologies that had developed up to that time. The FCC process, led by

14496-587: The ease of transfer to editing systems for special effects. Depending on the year and format in which a movie was filmed, the exposed image can vary greatly in size. Sizes range from as big as 24 mm × 36 mm for VistaVision / Technirama 8 perforation cameras (same as 35 mm still photo film) going down through 18 mm × 24 mm for Silent Films or Full Frame 4 perforations cameras to as small as 9 mm × 21 mm in Academy Sound Aperture cameras modified for

14647-639: The end of 2007 to over 1,000 screens by the end of 2015. As of September 2017, there were 1,302 IMAX theatres located in 75 countries, of which 1,203 were in commercial multiplexes. The switch to digital projection came at a steep cost in image quality, with 2K projectors having roughly an order of magnitude less resolution than traditional IMAX film projectors. Maintaining the same 7-story screen size would only make this loss more noticeable, so many new theaters were instead built with significantly smaller screens. These newer theaters with much lower resolution and much smaller screens soon began to be referred to by

14798-664: The exclusive sense for acronym and its earliest citation was from 1943. In early December 2010, Duke University researcher Stephen Goranson published a citation for acronym to the American Dialect Society e-mail discussion list which refers to PGN being pronounced "pee-gee-enn", antedating English language usage of the word to 1940. Linguist Ben Zimmer then mentioned this citation in his December 16, 2010 " On Language " column about acronyms in The New York Times Magazine . By 2011,

14949-456: The existing cameras. The Wall Street Journal revealed that the new cameras will be made out of carbon fiber and titanium, and they will feature a five inch color display along with wireless capability. In 2011, IMAX announced a 4K 3D digital camera. The camera was developed alongside Vision Research and AbelCine, integrating two Phantom 65 engines. A prototype camera was used for the documentary Born to be Wild , in which approximately 10% of

15100-430: The film into contact with this lens. Thus the " field flattener " flattens the image field. The lens is twice the height of the film and connects to a pneumatic piston so it can be moved up or down while the projector is running. This way, if a piece of dust comes off the film and sticks to the lens, the projectionist can switch to a clean portion of the lens at the push of a button. The lens also has "wiper bars" made of

15251-425: The film runs horizontally so that the image width can be greater than the width of the film stock . It is called the 15/70 format . They can be purpose-built theaters and dome theaters , and many installations of this type limit themselves to a projection of high quality, short documentaries. The dedicated buildings and projectors required high construction and maintenance costs, necessitating several compromises in

15402-537: The film. A feature film platter can cost US$ 36,000 to print. The camera negative is actually 65 mm film stock, but it runs horizontally and with 15 perforations per frame. The camera, like the projector, has a vacuum system; this makes the camera noisy, forbidding the sync-sound recording of quiet scenes. The camera has enough film for three minutes of shooting. The large frame of the film also imposes optical limitations such as an extremely shallow depth of field when shooting with an open aperture. To use more of

15553-763: The final word if spelled out in full. A classic example is "Member of Parliament", which in plural is "Members of Parliament". It is possible then to abbreviate this as "M's P", which was fairly common in mid-twentieth-century Australian news writing (or similar ), and used by former Australian Prime Minister Ben Chifley . This usage is less common than forms with "s" at the end, such as "MPs", and may appear dated or pedantic. In common usage, therefore, "weapons of mass destruction" becomes "WMDs", "prisoners of war" becomes "POWs", and "runs batted in" becomes "RBIs". Abbreviations that come from single, rather than multiple, words – such as "TV" ("television") – are usually pluralized without apostrophes ("two TVs"); most writers feel that

15704-408: The finished film was shot with the system. The company has said they have no intention of replacing the higher resolution film cameras with the new digital camera, but the latter can be used in scenes that require a lightweight or relatively small 3D camera. While IMAX has completed the production camera and has placed it in service on several films, they have no plans to produce an IMAX film solely with

15855-586: The first installation occurring at the Cineplex Scotiabank Theatre in Toronto . The system allows digital projection of the 1.43:1 aspect ratio surface of a traditional IMAX screen, but can also be used on other screens such as the 1.90:1-aspect-ratio TCL Chinese Theater . The system replaces the xenon arc lamp of a traditional digital projector with a laser light source, and is capable of 60 fps with "50 percent greater" brightness than

16006-464: The first letter of acronyms, reserving all-caps styling for initialisms, writing the pronounced acronyms "Nato" and "Aids" in mixed case, but the initialisms "USA" and "FBI" in all caps. For example, this is the style used in The Guardian , and BBC News typically edits to this style (though its official style guide, dating from 2003, still recommends all-caps ). The logic of this style is that

16157-460: The following years. To reduce costs, the IMAX SR and MPX systems were introduced in 1998 and 2004, respectively, to make IMAX available to multiplex and existing theaters. The SR system featured slightly smaller screens than GT theatres, though still in purpose-built auditoriums with a 1.43:1 aspect ratio. The MPX projectors were solely used to retrofit existing multiplex auditoriums, losing much of

16308-405: The frame, and most of the bottom half of the circular field falls beyond the edge of the film. The part of the field that would fall below the edge of the dome is masked. When filming, the camera is aimed upward at an angle that matches the tilt of the dome. When projected through a matching fisheye lens onto a dome, the original panoramic view is recreated. Omnimax wraps 180° horizontally, 100° above

16459-423: The game world than a traditional display with a 16:9 aspect ratio , and multi-monitor setups are possible, such as having a single game span across three monitors for a more immersive experience. Acronym An acronym is a type of abbreviation consisting of a phrase whose only pronounced elements are the initial letters or initial sounds of words inside that phrase. Acronyms are often spelled with

16610-571: The horizon and 22° below the horizon for a viewer at the center of the dome. Omnimax premiered in 1973, showing Voyage to the Outer Planets (produced by Graphic Films) and Garden Isle (by Roger Tilton Films) on a double bill. Later in the 70s a successful Omnimax center was built at Caesars Palace , Las Vegas , and ran strongly through the 80s and 90s, eventually being closed and rebuilt. IMAX has since renamed its Omnimax system "IMAX Dome", but some theaters (primarily those opened before

16761-467: The image area, IMAX film does not include an embedded soundtrack. Instead, the IMAX system specifies a separate six-channel 35 mm (1.4 in) magnetic film, recorded and played back on a film follower locked to picture, just as Vitaphone had been (utilizing 16-inch 33 1/3 RPM electrical transcription discs ) in the early 20th century, and was the same technology used to provide the 7-channel soundtrack accompanying films photographed and exhibited in

16912-436: The image detail produced by these formats can be far below that of broadcast HD, and often even inferior to DVD-Video (3-9 Mbit/s MP2) upscaled to the same image size. The following is a chart of numerous online services and their HD offering: Since the late 2000s a considerably large number of security camera manufacturers have started to produce HD cameras. The need for high resolution, color fidelity, and frame rate

17063-456: The initial letter of each word in all caps with no punctuation . For some, an initialism or alphabetism , connotes this general meaning, and an acronym is a subset with a narrower definition: an initialism pronounced as a word rather than as a sequence of letters. In this sense, NASA / ˈ n æ s ə / is an acronym but USA / j uː ɛ s ˈ eɪ / is not. The broader sense of acronym , ignoring pronunciation,

17214-435: The king". In English, abbreviations have previously been marked by a wide variety of punctuation . Obsolete forms include using an overbar or colon to show the ellipsis of letters following the initial part. The forward slash is still common in many dialects for some fixed expressions—such as in w/ for "with" or A/C for " air conditioning "—while only infrequently being used to abbreviate new terms. The apostrophe

17365-500: The label "usage problem". However, many English language dictionaries, such as the Collins COBUILD Advanced Dictionary , Cambridge Advanced Learner's Dictionary , Macmillan Dictionary , Longman Dictionary of Contemporary English , New Oxford American Dictionary , Webster's New World Dictionary , and Lexico from Oxford University Press do not acknowledge such a sense. Most of

17516-836: The language to changing circumstances. In this view, the modern practice is just the "proper" English of the current generation of speakers, much like the earlier abbreviation of corporation names on ticker tape or newspapers. Exact pronunciation of "word acronyms" (those pronounced as words rather than sounded out as individual letters) often vary by speaker population. These may be regional, occupational, or generational differences, or simply personal preference. For instance, there have been decades of online debate about how to pronounce GIF ( / ɡ ɪ f / or / dʒ ɪ f / ) and BIOS ( / ˈ b aɪ oʊ s / , / ˈ b aɪ oʊ z / , or / ˈ b aɪ ɒ s / ). Similarly, some letter-by-letter initialisms may become word acronyms over time, especially in combining forms: IP for Internet Protocol

17667-437: The large area of a dome screen. The single-projector/single-camera system they eventually settled upon was designed and built by Shaw based upon a novel "Rolling Loop" film-transport technology purchased from Peter Ronald Wright Jones, a machine shop worker from Brisbane, Australia. Film projectors do not continuously flow the film in front of the bulb, but instead "stutter" the film travel so that each frame can be illuminated in

17818-466: The more general "x" can be used to replace an unspecified number of letters. Examples include "Crxn" for "crystallization" and the series familiar to physicians for history , diagnosis , and treatment ("hx", "dx", "tx"). Terms relating to a command structure may also sometimes use this formatting, for example gold, silver, and bronze levels of command in UK policing being referred to as Gx, Sx, and Bx. There

17969-468: The name is descriptive, you can't trademark it so you have to make up a word. So we were sitting at lunch one day in a Hungarian restaurant in Montreal and we worked out a name on a placemat on which we wrote all the possible names we could think of. We kept working with the idea of maximum image. We turned it around and came up with IMAX. The name change actually happened more than two years later, because

18120-550: The new digital system. Transformers: Age of Extinction is the first feature film partially filmed with the Phantom 65 IMAX 3D camera. In 2015, IMAX announced a 2D digital camera that was developed alongside Arri , the camera being based on the latter company's Arri Alexa 65 technology. The first production to use the camera was Captain America: Civil War . The Russo brothers have stated that they solely used

18271-729: The plural of 'pages', or mss. for manuscripts . The most common capitalization scheme seen with acronyms is all-uppercase ( all caps ). Small caps are sometimes used to make the run of capital letters seem less jarring to the reader. For example, the style of some American publications, including the Atlantic Monthly and USA Today , is to use small caps for acronyms longer than three letters; thus "U.S." and " FDR " in normal caps, but " nato " in small caps. The acronyms " AD " and " BC " are often smallcapped as well, as in: "From 4004 bc to ad 525 ". Where an acronym has linguistically taken on an identity as regular word,

18422-483: The pronunciation is reflected graphically by the capitalization scheme. However, it conflicts with conventional English usage of first-letter upper-casing as a marker of proper names in many cases; e.g. AIDS stands for acquired immuno-deficiency syndrome which is not a proper name, while Aids is in the style of one. Some style manuals also base the letters' case on their number. The New York Times , for example, keeps "NATO" in all capitals (while several guides in

18573-685: The publication of the 3rd edition of the Oxford English Dictionary added the expansive sense to its entry for acronym and included the 1940 citation. As the Oxford English Dictionary structures the senses in order of chronological development, it now gives the "initialism" sense first. English language usage and style guides which have entries for acronym generally criticize the usage that refers to forms that are not pronounceable words. Fowler's Dictionary of Modern English Usage says that acronym "denotes abbreviations formed from initial letters of other words and pronounced as

18724-457: The quality of HD video is very high compared to SD video, and offers improved signal/noise ratios against comparable sensitivity film, film remains able to resolve more image detail than current HD video formats. In addition some films have a wider dynamic range (ability to resolve extremes of dark and light areas in a scene) than even the best HD cameras. Thus the most persuasive arguments for the use of HD are currently cost savings on film stock and

18875-593: The quality of the GT experience. Later came the introduction of the IMAX Digital 2K and IMAX with Laser 4K in 2008 and 2014 respectively, still limited in respect to the 70 megapixels of equivalent resolution of the original 15/70 film. Both technologies are purely digital and suitable to retrofit existing theaters. Since 2018, the Laser system has been employed to retrofit full dome installations, with limited results due to

19026-589: The release of The Dark Knight Rises in July 2012. In April 2012, IMAX began testing a new 4K laser projection system, based on patents licensed from Eastman Kodak . Like the 3D film and digital systems, it used two projectors, but it improved over the smaller digital screens by retaining the traditional IMAX aspect ratio and let films be shown on screens 36 m (118 ft) wide or more. In December 2014, IMAX began rolling out its new dual 4K laser projector system, dubbed "IMAX with Laser" and known as IMAX GT, with

19177-437: The resolution of security cameras, some manufacturers developed multi-sensor cameras. Within these devices several sensor-lens combinations produce the images, which are later merged during image processing . These security cameras are able to deliver even hundreds of megapixels with motion picture frame rate. Such high resolutions, however, requires special recording, storage and also video stream display technologies. Both

19328-437: The resolution to be reduced with each emulsion copying step and when the image passes through a lens (for example, on a projector). In many cases, the resolution can be reduced down to 1/6 of the original negative's resolution (or worse). Note that resolution values for 70 mm film are higher than those listed above. Many online video streaming, on-demand and digital download services offer HD video. Due to heavy compression,

19479-431: The scope of certified cameras expands, it will be easier for filmmakers to create films to meet the projection needs of the IMAX giant screen theater. Top Gun: Maverick (shot with the Sony CineAlta Venice) and Dune (shot with the Arri Alexa LF and Mini LF) were among the first films that used IMAX-certified cameras. Other films between 2021 and 2023 that captured with this program are The Suicide Squad (shot with

19630-785: The show begins, the screen can be backlit to show the speakers and girders behind it. The screen may be a permanent fixture, such as at the Museum of Science and Industry ( Henry Crown Space Center ) in Chicago, Illinois; the Fort Worth Museum of Science and History ; the Franklin Institute in Philadelphia, Pennsylvania; the St. Louis Science Center ; Boston's Museum of Science ; Richmond's Science Museum of Virginia ;

19781-470: The sides of railroad cars (e.g., "Richmond, Fredericksburg and Potomac Railroad" → "RF&P"); on the sides of barrels and crates; and on ticker tape and newspaper stock listings (e.g. American Telephone and Telegraph Company → AT&T). Some well-known commercial examples dating from the 1890s through 1920s include " Nabisco " ("National Biscuit Company"), " Esso " (from "S.O.", from " Standard Oil "), and " Sunoco " ("Sun Oil Company"). Another field for

19932-498: The size or shape of ESTAR print film, and IMAX's pin registration system ( especially that of the camera mechanism ) does not tolerate either sprocket -hole or film-thickness variations, but the film can still swell or shrink under varying temperature and humidity. This requires projection booths to be kept at a temperature of between 20 and 23.8 °C and a humidity of 50%. The film is too large to be moved using its sprockets, so they are instead used for registration, to aid in aligning

20083-415: The sound mix engineers to take advantage of the screen's greater height. Transporting the large film stock through the optical system presented challenges for both the camera and the projector. Conventional 70 mm systems were not steady enough for the 586× magnification. On the projector side, William Shaw adapted an Australian patent (no. 291,375) for film transport called the "rolling loop" by adding

20234-427: The standard image resolution of the moving image produced with the film-speed of 24 frames per second , an IMAX film requires three times the length of (negative) film stock required for a 65 mm film of comparable scope and cinematic technique . In March 2022, IMAX announced a new initiative in cooperation with Kodak , Panavision , and FotoKem to develop "a new fleet of next generation IMAX film cameras", with

20385-490: The system facilitates inexpensive distribution of IMAX features, the company announced in February 2012 that they were renovating specially selected locations around the world to present both 70 mm analog as well as digital presentations. To do so, IMAX developed a rail system that moves the projectors in and out to accommodate either a full-frame film print or a digital-only release. These theaters were prepared in time for

20536-502: The terms as mutually exclusive. Other guides outright deny any legitimacy to the usage: Bryson's Dictionary of Troublesome Words says "Abbreviations that are not pronounced as words (IBM, ABC, NFL) are not acronyms; they are just abbreviations." Garner's Modern American Usage says "An acronym is made from the first letters or parts of a compound term. It's read or spoken as a single word, not letter by letter." The New York Times Manual of Style and Usage says "Unless pronounced as

20687-457: The theoretical resolution of traditional IMAX film, which is estimated at up to 12,000 lines of horizontal resolution on the 65 mm camera negative (12K) and approximately 6,000 on a 35 mm release print (6K), the new laser system features dual- 4K resolution projectors, each capable of displaying four times the detail of one Digital IMAX projector. Like Digital IMAX, images from the two projectors are projected superimposed on each other with

20838-570: The twenty-first century. The trend among dictionary editors appears to be towards including a sense defining acronym as initialism : the Merriam-Webster's Collegiate Dictionary added such a sense in its 11th edition in 2003, and both the Oxford English Dictionary and The American Heritage Dictionary added such senses in their 2011 editions. The 1989 edition of the Oxford English Dictionary only included

20989-536: The whole range of linguistic registers is relatively new in most languages, becoming increasingly evident since the mid-twentieth century. As literacy spread and technology produced a constant stream of new and complex terms, abbreviations became increasingly convenient. The Oxford English Dictionary ( OED ) records the first printed use of the word initialism as occurring in 1899, but it did not come into general use until 1965, well after acronym had become common. In English, acronyms pronounced as words may be

21140-425: The word " an achro nym ", which is a type of misnomer. Words derived from an acronym by affixing are typically expressed in mixed case, so the root acronym is clear. For example, "pre-WWII politics", "post-NATO world", " DNase ". In some cases a derived acronym may also be expressed in mixed case. For example, " messenger RNA " and " transfer RNA " become "mRNA" and "tRNA". Some publications choose to capitalize only

21291-497: Was abandoning the format and would discontinue development, marketing and manufacturing of HD DVD players and drives. The high resolution photographic film used for cinema projection is exposed at the rate of 24 frames per second but usually projected at 48, each frame getting projected twice helping to minimise flicker. One exception to this was the 1986 National Film Board of Canada short film Momentum , which briefly experimented with both filming and projecting at 48 frame/s, in

21442-511: Was done with a full space between every full word (e.g. A. D. , i. e. , and e. g. for " Anno Domini ", " id est ", and " exempli gratia "). This even included punctuation after both Roman and Arabic numerals to indicate their use in place of the full names of each number (e.g. LII. or 52. in place of "fifty-two" and "1/4." or "1./4." to indicate "one-fourth"). Both conventions have fallen out of common use in all dialects of English, except in places where an Arabic decimal includes

21593-561: Was featured in the US Pavilion (the largest structure in the expo). It became the first IMAX Theatre to not be partnered with any other brand of movie theatres. About five million visitors viewed the screen, which covered the viewer's total visual field when looking directly forward. This created a sensation of motion in most viewers, and motion sickness in some. Another IMAX 3D theatre was also built in Spokane; however, its screen size

21744-427: Was hoped for after decades of largely non-interoperable analog TV broadcasting. High definition video (prerecorded and broadcast) is defined threefold, by: Often, the rate is inferred from the context, usually assumed to be either 50 Hz (Europe) or 60 Hz (USA), except for 1080p , which denotes 1080p24, 1080p25, and 1080p30, but also 1080p50 and 1080p60. A frame or field rate can also be specified without

21895-561: Was later adapted into a motion-compensated DCT algorithm for video coding formats such as the H.26x formats from the Video Coding Experts Group from 1988 onwards and the MPEG formats from 1993 onwards. Motion-compensated DCT compression significantly reduced the amount of memory and bandwidth required for digital video, capable of achieving a data compression ratio of around 100:1 compared to uncompressed video. By

22046-449: Was little to no naming , conscious attention, or systematic analysis until relatively recent times. Like retronymy, it became much more common in the twentieth century than it had formerly been. Ancient examples of acronymy (before the term "acronym" was invented) include the following: During the mid- to late nineteenth century, acronyms became a trend among American and European businessmen: abbreviating corporation names, such as on

22197-415: Was located at the tip of Canada Place , a Vancouver landmark. In 2008, IMAX extended its brand into traditional theaters with the introduction of Digital IMAX, a lower-cost system that uses two 2K digital projectors to project on a 1.90:1 aspect ratio screen. This lower-cost option, which allowed for the conversion of existing multiplex theater auditoriums, helped IMAX to grow from 299 screens worldwide at

22348-523: Was the first high definition television system, since the mechanical systems it replaced had far fewer. From 1939, Europe and the US tried 605 and 441 lines until, in 1941, the FCC mandated 525 for the US. In wartime France, René Barthélemy tested higher resolutions, up to 1,042. In late 1949, official French transmissions finally began with 819 . In 1984, however, this standard was abandoned for 625-line color on

22499-573: Was the largest IMAX Dome/OMNIMAX theatre in the world) with an Evans & Sutherland Digistar 6 "True8K" digital system in 2017. In November 2018, the Hackworth IMAX dome in The Tech Museum (now The Tech Interactive ) replaced its 70 mm IMAX projector with a 4K IMAX Laser projector. It became the first digital IMAX Laser dome theater in the world. High-definition video The first electronic scanning format, 405 lines ,

22650-404: Was three times longer, and so Jones's invention was necessary for the novel IMAX projector method with its horizontal film feed. As it became clear that a single, large-screen image had more impact than multiple smaller ones and was a more viable product direction, Multiscreen changed its name to IMAX. Co-founder Graeme Ferguson explained how the name IMAX originated: ... the incorporation date [of

22801-484: Was unsuitable for use inside a dome because it had a 3.65 m (12.0 ft) tall lamp house on top. IMAX Corporation redesigned its system, adding an elevator to lift the projector to the center of the dome from the projection booth below. Spectra Physics designed a suitable lamphouse that took smaller, 46 cm (18 in) lamps and placed the bulb behind the lens instead of above the projector. In 1970, Ernst Leitz Canada, Ltd. (now ELCAN Optical Technologies ) won

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