What is the diameter in centimetres (a whole number) of a CD (not a mini-CD)?
"Queen"" (original French sleeve). Queen CD Single Box The CD Single Box was a CD compilation box set by the English rock band Queen released exclusively in Japan on 26 April 1991 by EMI Records. The CDs are housed inside a gold embossed flip top box with a 48-page booklet which includes the bio, anthology and song lyrics in English and Japanese. The box set has 12 x 3"" CD single ('Mini Album' written on the reverse of all sleeves) snap-packs (Japanese: tanzaku) which includes twelve hit-singles released between 1973 and 1986. The singles start with the A-side tracks ""Seven"
"a diameter of and can hold up to about 80 minutes of uncompressed audio or about 700 MiB of data. The Mini CD has various diameters ranging from ; they are sometimes used for CD singles, storing up to 24 minutes of audio, or delivering device drivers. At the time of the technology's introduction in 1982, a CD could store much more data than a personal computer hard drive, which would typically hold 10 MB. By 2010, hard drives commonly offered as much storage space as a thousand CDs, while their prices had plummeted to commodity level. In 2004, worldwide"
"and aluminium found in CDs. The digital data on a CD begins at the center of the disc and proceeds toward the edge, which allows adaptation to the different size formats available. Standard CDs are available in two sizes. By far, the most common is in diameter, with a 74- or 80-minute audio capacity and a 650 or 700 MiB (737,280,000-byte) data capacity. The official Philips history says this capacity was specified by Sony executive Norio Ohga so as to be able to contain the entirety of Beethoven's Ninth Symphony on one disc. This is a myth according to Kees"
"Mini CD Mini CDs, or pocket CDs, are CDs with a smaller diameter and one third the storage capacity of a standard 120 mm disc. Amongst the various formats are the In 1997 Dean Procter of Imaginet was offering business card sized square CDs with full screen hi-fi stereo video which played in quad speed CD ROMs or DVD drives with the centre well. A variety of laser cut shapes were developed. When Mini CDs were first introduced in the United States, they were initially marketed as CD3, in reference to their approximate size in inches; larger CDs were called"
"CD-ROMs are identical in appearance to audio CDs, and data are stored and retrieved in a very similar manner (only differing from audio CDs in the standards used to store the data). Discs are made from a 1.2 mm thick disc of polycarbonate plastic, with a thin layer of aluminium to make a reflective surface. The most common size of CD-ROM is 120 mm in diameter, though the smaller Mini CD standard with an 80 mm diameter, as well as shaped compact discs in numerous non-standard sizes and molds (e.g., business card-sized media), are also available. Data is stored on"
"or very careful placement of the CD in the exact middle of the tray. Not until after the major record labels discontinued them, did the CD Players start to have the 80 mm circular indentation as standard. Since the mid-1990s, all tray loading players have a circular indentation for the Mini CD. Mini CD-R, Mini CD-RW: As of 2007, many manufacturers offer 80 mm CD-R and CD-RW discs for sale in retail electronics and office supply stores. These are sometimes marketed as ""Pocket CD-R/CD-RW"" (Memorex) or ""Mini CD-R"" (TDK). Most of the blank discs available in retail hold either 185"
"has various diameters ranging from 60 to 80 mm; they are sometimes used for CD singles or device drivers, storing up to 24 minutes of audio. The technology was later adapted and expanded to include data storage CD-ROM, write-once audio and data storage CD-R, rewritable media CD-RW, Super Audio CD (SACD), Video Compact Discs (VCD), Super Video Compact Discs (SVCD), PhotoCD, PictureCD, CD-i, and Enhanced CD. CD-ROMs and CD-Rs remain widely used technologies in the computer industry. The CD and its extensions have been extremely successful: in 2004, worldwide sales of CD audio, CD-ROM, and CD-R reached about 30 billion"
"CD5, despite the fact that both CD specifications are defined solely in terms of metric units. Now, they are known as either Mini CDs or 80 mm CDs. Most tray-loading CD devices have 2 'circular indentation'; one sized for a regular 120 mm CD, and a smaller, deeper circular indentation for Mini CDs to fit into, except for some Blu-ray players. Devices that feature a spindle also support MiniCDs, as the disc can simply be placed onto the spindle as with a normal CD. Some vertically aligned tray-loading devices, such as the older pre-slimline PlayStation 2 consoles when placed vertically,"
"CD single A CD single (sometimes abbreviated to CDS) is a music single in the form of a compact disc. The standard in the Red Book for the term ""CD single"" is an 8cm (3 inch) CD (or Mini CD). It now refers to any single recorded onto a CD of any size, particularly the CD5, or 5-inch CD single. The format was introduced in the mid-1980s but did not gain its place in the market until the early 1990s. With the rise in digital downloads in the early 2010s, sales of CD singles have decreased. Commercially released CD singles"
"MiniDVD MiniDVD (also Mini DVD or miniDVD) is a DVD disc which is in diameter. It refers two separated formats as well. One is a pseudo-format that uses 80mm CD-R(W) to store contents with the same structure as the standard DVD-Video so that standalone DVD players can play it like standard DVD. The other format is a real DVD format, but in a smaller 80mm size, which holds 1.4 GB of data. But there are variants that hold up to 5.2 GB. The 8 cm optical disc format was originally used for music CD singles, hence the commonly used names"
"changed later on as explained above, so the capacity decreased. Other formats, those with 8 cm diameter and hybrid variants, acquired similar numeric names with even larger deviation. The 12 cm type is a standard DVD, and the 8 cm variety is known as a MiniDVD. These are the same sizes as a standard CD and a mini-CD, respectively. The capacity by surface area (MiB/cm) varies from 6.92 MiB/cm in the DVD-1 to 18.0 MB/cm in the DVD-18. Each DVD sector contains 2,418 bytes of data, 2,048 bytes of which are user data. There is a small difference in storage"
"hearing, in the sense that print readers would understand it. Different people are likely to have their own preferences about the way they access audio, depending on their experiences, how comfortable are they with technology, and the equipment they to access the audio content. Compact Discs (CDs) were first produced in the 1980s to store and playback sound recordings exclusively, and became superior to cassette tapes (AC) offering better sound and size. Standard CDs have a diameter of 120 millimetres (4.7 in) and can hold up to 80 minutes of uncompressed audio (or 700 Megabytes of data). CDs offer some"
"as singles. The original ""CD single"" (sometimes mini CD single or 3-inch CD or CD3 in the US) is a music single released on a mini Compact Disc that measures in diameter, rather than the standard . They are manufactured using the same methods as standard full-size CDs, and can be played in most standard audio CD players and CD-ROM disc drives. The format was first released in the United States, United Kingdom, Japan, France, West Germany, and Hong Kong in 1987 as the replacement for the 7-inch single. While mini CDs have fallen out of popularity among most major"
"to avoid problems when it begins to spin. Second, at least three points of the outer edge must touch either the outer 12 cm diameter rim of the players tray where standard size discs fit or the inner rim where 8 cm diameter mini discs fit. Data can only be recorded on sections of a Shaped CD that form uninterrupted circular tracks. Other parts of the shape are purely decorative - but are still often finished to the same appearance as a CD. They appear silver and reflective on the data side of the CD, even though they contain no"
"on CDs and other physical formats. Despite the rapidly declining sales year-over-year, the pervasiveness of the technology remained for a time, with companies placing CDs in pharmacies, supermarkets, and filling station convenience stores targeting buyers least able to use Internet-based distribution. However, in 2018, Best Buy and Target Corporation both announced plans to decrease their focus on CD sales. Sony and Philips received praise for the development of the compact disc from professional organizations. These awards include A CD is made from thick, polycarbonate plastic and weighs 15–20 grams. From the center outward, components are: the center spindle hole (15"
"with 12 cm (4.75 in) being the most common size. A typical disc is about 1.2 mm (0.05 in) thick, while the track pitch (distance from the center of one track to the center of the next) ranges from 1.6 µm (for CDs) to 320 nm (for Blu-ray discs). An optical disc is designed to support one of three recording types: read-only (e.g.: CD and CD-ROM), recordable (write-once, e.g. CD-R), or re-recordable (rewritable, e.g. CD-RW). Write-once optical discs commonly have an organic dye recording layer between the substrate and the reflective layer. Rewritable discs typically contain an alloy recording layer"
"Immink, as the code format had not yet been decided in December 1979. The adoption of EFM in June 1980 would have allowed a playing time of 97 minutes for 120 mm diameter or 74 minutes for a disc as small as 100 mm, but instead the information density was lowered by 30% to keep the playing time at 74 minutes. The 120 mm diameter has been adopted by subsequent formats, including Super Audio CD, DVD, HD DVD, and Blu-ray Disc. The 80 mm diameter discs (""Mini CDs"") can hold up to 24 minutes of music or 210 MiB. The"
"Disc Application Flag that identifies their type: standalone audio recorders will only accept ""music"" CD-Rs to enforce the RIAA arrangement, while computer CD-R drives can use either type of media to burn either type of content. A standard CD-R is a thick disc made of polycarbonate about 120 mm (4.7 in) or 80 mm (3.150 in) diameter. The 120 mm disc has a storage capacity of 74 minutes of audio or 650 Megabytes of data. CD-R/RWs are available with capacities of 80 minutes of audio or 737,280,000 bytes (700 MiB), which they achieve by molding the disc at the tightest"
"MB (21 minutes) or 210 MB (24 minutes) of data. The mini discs, despite having less weight and plastic, are generally more expensive than full size CD-R/CD-RW discs. Mini CD Replication Manufacturing: Custom-manufactured Mini CDs with integral data are available to the retail market. There are two variations on how the finished product is created: The short lived ""Lid Rock"" promotion that gave away CD singles on the underside of soda lids from Regal Movie Theaters used Mini CDs. While almost any spindle-based or tray-based CD device can utilize mini CD media, some devices have been designed expressly to use"
"iPod Photo adapters and various other hard disk based photo storage units. Mini CD Mini CDs, or pocket CDs, are CDs with a smaller diameter and one third the storage capacity of a standard 120 mm disc. Amongst the various formats are the In 1997 Dean Procter of Imaginet was offering business card sized square CDs with full screen hi-fi stereo video which played in quad speed CD ROMs or DVD drives with the centre well. A variety of laser cut shapes were developed. When Mini CDs were first introduced in the United States, they were initially marketed as CD3,"
"8 cm CD singles, and the second contains four CD singles along with an adapter for playing the 8 cm CDs in CD players which can only handle the standard 12 cm CDs (such as slot-drives for which the 8 cm CD single format is too small). The inside of each folder features ""film strip""-style summaries of the opening and ending credits used throughout the anime series. The outside cover of each folder features full color group scenes of the characters from the series. The insert shows the covers of all the CD singles represented in this collection, as well"
"size. The record diameters are typically nominally 300 mm, 250 mm and 175 mm. There is an area about 3 mm (0.12 in) wide at the outer edge of the disk, called the ""lead-in"" or ""run-in"", where the groove is widely spaced and silent. The stylus is lowered onto the lead-in, without damaging the recorded section of the groove. Between tracks on the recorded section of an LP record there is usually a short gap of around 1 mm (0.04 in) where the groove is widely spaced. This space is clearly visible, making it easy to find a particular track."
"7"" vinyl combined total of 64 copies, where it reached No. 16 in the Mid-Week Chart. In March 2011, Mercury Records announced that they were to stop manufacturing CD singles for lack of demand and loss of money on the format in 2010. As of 2012, selected HMV stores sold a small selection of CD singles, mostly charity releases and acts from ""The X Factor"". CD single A CD single (sometimes abbreviated to CDS) is a music single in the form of a compact disc. The standard in the Red Book for the term ""CD single"" is an 8cm (3"
"Pre-emphasis time constants are 50µs and 15µs (9.49 dB boost at 20 kHz), and a binary flag in the disc subcode instructs the player to apply de-emphasis filtering if appropriate. Playback of such discs in a computer or 'ripping' to wave files typically does not take into account the pre-emphasis, so such files play back with a distorted frequency response. The creators of the CD originally aimed at a playing time of 60 minutes with a disc diameter of 100 mm (Sony) or 115 mm (Philips). Sony vice-president Norio Ohga suggested extending the capacity to 74 minutes to accommodate the"
"Double-density compact disc Double-density compact disc (DDCD) is an optical disc technology developed by Sony using the same laser wavelength as compact disc, namely 780 nm. The format is defined by the ""Purple Book"" standard document. Unlike the compact-disc technology it is based on, DDCD was designed exclusively for data with no audio capabilities. For a 12 cm disc, it doubles the original 650 MB to 1.3 GB capacity of a CD on recordable (DDCD-R) and rewritable (DDCD-RW) discs by narrowing the track pitch from 1.6 to 1.1 micrometers, and shortening the minimum pit length from 0.833 to 0.623 micrometer."
"area is 86.05 cm and the length of the recordable spiral is (86.05 cm / 1.6 µm) = 5.38 km. With a scanning speed of 1.2 m/s, the playing time is 74 minutes, or 650 MiB of data on a CD-ROM. A disc with data packed slightly more densely is tolerated by most players (though some old ones fail). Using a linear velocity of 1.2 m/s and a narrower track pitch of 1.5 µm increases the playing time to 80 minutes, and data capacity to 700 MiB. A CD is read by focusing a 780 nm wavelength (near infrared) semiconductor"
"CD single and miniCD. Similarly, the manufactured 8 cm DVDs were originally used for music videos and as such became known as DVD single. MiniDVD is known also as ""3 inch DVD"", referring to its approximate diameter in inches. A MiniDVD can be played back in most Blu-ray and DVD players that are tray loaded. The trays on players and DVD drives have an inner ring where the 8 cm disc is centered for loading in the player. Most slot loading players cannot use this format; there are exceptions, however, such as the Xbox 360, PlayStation 3, and the Wii."
"and MCA did not last long, and discontinued after a few years. The Compact Disc (CD), which is based on MCA/Philips Laserdisc technology, was developed by a taskforce of Sony and Philips in 1979-1980. Toshi Doi and Kees Schouhamer Immink created the digital technologies that turned the analog Laserdisc into a high-density low-cost digital audio disc. The CD, available on the market since October 1982, remains the standard physical medium for sale of commercial audio recordings Standard CDs have a diameter of 120 mm and can hold up to 80 minutes of audio (700 MB of data). The Mini CD"
"small square case/cover form only, some including a 5"" CD adapter to use in normal compact disc players. Although the format was not widely available in the United Kingdom, several artists have released singles in the format. From a technical standpoint, a 3-inch CD follows the Red Book standard for CD digital audio. The major difference is that the smaller physical size of the disc allows for fewer data sectors, meaning the disc can store less audio. The majority of audio CD players and CD-ROM drives have a smaller circular indentation in the CD tray for holding these discs. Most"
"Shaped Compact Disc A shaped Compact Disc is a non-circular compact disc. Examples include business card CDs, CDs in the shape of a star, a map of a country, interview material and more. These disks are usually made for marketing purposes and are properly read by most CD-ROM drives (and audio CD players, although custom-shaped CDs tend to contain less data). There are many companies that sell CDs with custom shapes. Unlike Mini CDs, which are smaller, but still circular versions of normal CDs, custom CDs can be any number of shapes, even more complicated shapes like gears with dozens"
"CD Video CD Video (also known as CDV, CD-V, or CD+V) is a format of optical media disc that was introduced in 1987 that combines the technologies of standard compact disc and LaserDisc. CD-V discs are the same size as a standard 12-cm audio CD, and contain up to 20 minutes' worth of CD Audio that can be played on any audio CD player. It also contains up to 5 minutes of LaserDisc video information with digital CD-quality sound, which can be played back on a newer LaserDisc player capable of playing CD-V discs. One of the first LaserDisc players"
"Compact Disc subcode Subcode or subchannel data (called ""control bytes"" in the CD-ROM specification) refers to data contained in a compact disc (CD) in addition to digital audio or user data, which is used for control and playback of the CD. The original specification was defined in the Red Book standard for CD Digital Audio, though further specifications have extended their use (including the CD-ROM, CD Text and CD+G specifications). Subchannel data is multiplexed with the digital audio or user digital data. The data in a CD are arranged in frames. A frame comprises 33 bytes, of which 24 bytes"
"on both sides. The teeth are made in such a way that when the case is closed, they go between the gaps in between the teeth on the other side. A standard DVD case is a single-piece plastic case with two creases, which folds around and snaps closed. It measures 135 mm × 190 mm × 14 mm (5.3 in × 7.48 in × 0.55 in). It is wrapped on the outside by a thin piece of transparent plastic which can hold a paper label. The label measures 284 mm × 184 mm (10.8 in × 7.25 in). Some DVD"