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73-458: Started in March 2000, the site has expanded to contain a wide range of information on the subject of digital video encoding and DVD backup (or ripping ). The most popular sections of the site were the guides to DVD ripping and the annual codec comparisons, where popular digital video codecs were compared on the basis of quality, speed, and compression. The forum is frequented by many developers of

146-505: A cognate of the word substantive as the basic term for noun (for example, Spanish sustantivo , "noun"). Nouns in the dictionaries of such languages are demarked by the abbreviation s. or sb. instead of n. , which may be used for proper nouns or neuter nouns instead. In English, some modern authors use the word substantive to refer to a class that includes both nouns (single words) and noun phrases (multiword units that are sometimes called noun equivalents ). It can also be used as

219-624: A noun is a word that represents a concrete or abstract thing, such as living creatures, places, actions, qualities, states of existence, and ideas. A noun may serve as an object or subject within a phrase, clause, or sentence. In linguistics , nouns constitute a lexical category ( part of speech ) defined according to how its members combine with members of other lexical categories. The syntactic occurrence of nouns differs among languages. In English, prototypical nouns are common nouns or proper nouns that can occur with determiners , articles and attributive adjectives , and can function as

292-544: A or an (in languages that have such articles). Examples of count nouns are chair , nose , and occasion . Mass nouns or uncountable ( non-count ) nouns differ from count nouns in precisely that respect: they cannot take plurals or combine with number words or the above type of quantifiers. For example, the forms a furniture and three furnitures are not used – even though pieces of furniture can be counted. The distinction between mass and count nouns does not primarily concern their corresponding referents but more how

365-445: A person , place , thing , event , substance , quality , quantity , etc., but this manner of definition has been criticized as uninformative. Several English nouns lack an intrinsic referent of their own: behalf (as in on behalf of ), dint ( by dint of ), and sake ( for the sake of ). Moreover, other parts of speech may have reference-like properties: the verbs to rain or to mother , or adjectives like red ; and there

438-485: A DVD player, a figure that had surpassed VCRs; it was also higher than personal computers or cable television. The DVD specifications created and updated by the DVD Forum are published as so-called DVD Books (e.g. DVD-ROM Book, DVD-Audio Book, DVD-Video Book, DVD-R Book, DVD-RW Book, DVD-RAM Book, DVD-AR (Audio Recording) Book, DVD-VR (Video Recording) Book, etc.). DVD discs are made up of two discs; normally one

511-763: A NIST/ LoC research project conducted in 2005–2007 using accelerated life testing , "There were fifteen DVD products tested, including five DVD-R, five DVD+R, two DVD-RW and three DVD+RW types. There were ninety samples tested for each product. ... Overall, seven of the products tested had estimated life expectancies in ambient conditions of more than 45 years. Four products had estimated life expectancies of 30–45 years in ambient storage conditions. Two products had an estimated life expectancy of 15–30 years and two products had estimated life expectancies of less than 15 years when stored in ambient conditions." The life expectancies for 95% survival estimated in this project by type of product are tabulated below: Noun In grammar ,

584-449: A November 1997 online interview, and clarified it would release discs in early 1998. However, this date would be pushed back several times before finally releasing their first titles at the 1999 Consumer Electronics Show . In 2001, blank DVD recordable discs cost the equivalent of $ 27.34 US dollars in 2022. Movie and home entertainment distributors adopted the DVD format to replace

657-634: A computer. DVD players are a particular type of devices that do not require a computer to work, and can read DVD-Video and DVD-Audio discs. Read and write speeds for the first DVD drives and players were 1,385  kB /s (1,353  KiB /s); this speed is usually called "1×". More recent models, at 18× or 20×, have 18 or 20 times that speed. For CD drives, 1× means 153.6 kB/s (150 KiB/s), about one-ninth as swift. DVDs can spin at much higher speeds than CDs – DVDs can spin at up to 32000 RPM vs 23000 for CDs. In practice, they are not spun by optical drives anywhere close to these speeds to provide

730-491: A cost: DVD±DLs have slower write speeds as compared to DVD±R. DVD-R DL was developed for the DVD Forum by Pioneer Corporation ; DVD+R DL was developed for the DVD+RW Alliance by Mitsubishi Kagaku Media (MKM) and Philips . Recordable DVD discs supporting dual-layer technology are backward-compatible with some hardware developed before the recordable medium. DVD drives are devices that can read DVD discs on

803-411: A counterpart to attributive when distinguishing between a noun being used as the head (main word) of a noun phrase and a noun being used as a noun adjunct . For example, the noun knee can be said to be used substantively in my knee hurts , but attributively in the patient needed knee replacement . A noun can co-occur with an article or an attributive adjective . Verbs and adjectives cannot. In

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876-495: A double-sided disc. Philips and Sony decided that it was in their best interests to end the format war, and on September 15, 1995 agreed to unify with companies backing the Super Density Disc to release a single format, with technologies from both. After other compromises between MMCD and SD, the group of computer companies won the day, and a single format was agreed upon. The computer companies also collaborated with

949-773: A dual-layer DVD up to 8.5 GB. Variants can store up to a maximum of 17.08 GB. Prerecorded DVDs are mass-produced using molding machines that physically stamp data onto the DVD. Such discs are a form of DVD-ROM because data can only be read and not written or erased. Blank recordable DVD discs ( DVD-R and DVD+R ) can be recorded once using a DVD recorder and then function as a DVD-ROM. Rewritable DVDs ( DVD-RW , DVD+RW , and DVD-RAM ) can be recorded and erased many times. DVDs are used in DVD-Video consumer digital video format and less commonly in DVD-Audio consumer digital audio format, as well as for authoring DVD discs written in

1022-463: A language. Nouns may be classified according to morphological properties such as which prefixes or suffixes they take, and also their relations in syntax  – how they combine with other words and expressions of various types. Many such classifications are language-specific, given the obvious differences in syntax and morphology. In English for example, it might be noted that nouns are words that can co-occur with definite articles (as stated at

1095-485: A noticeable pause in A/V playback on earlier DVD players , the length of which varies between hardware. A printed message explaining that the layer-transition pause was not a malfunction became standard on DVD keep cases . During mastering, a studio could make the transition less obvious by timing it to occur just before a camera angle change or other abrupt shift, an early example being the DVD release of Toy Story . Later in

1168-417: A noun that represents a unique entity ( India , Pegasus , Jupiter , Confucius , Pequod ) – as distinguished from common nouns (or appellative nouns ), which describe a class of entities ( country , animal , planet , person , ship ). In Modern English, most proper nouns – unlike most common nouns – are capitalized regardless of context ( Albania , Newton , Pasteur , America ), as are many of

1241-479: A press release stating that they would only accept a single format. The group voted to boycott both formats unless the two camps agreed on a single, converged standard. They recruited Lou Gerstner , president of IBM, to pressure the executives of the warring factions. In one significant compromise, the MMCD and SD groups agreed to adopt proposal SD 9, which specified that both layers of the dual-layered disc be read from

1314-449: A safety margin. DVD drives limit reading speed to 16× (constant angular velocity), which means 9280 rotations per minute. Early-generation drives released before the mid-2000s have lower limits. DVD recordable and rewritable discs can be read and written using either constant angular velocity (CAV), constant linear velocity (CLV), Partial constant angular velocity (P-CAV) or Zoned Constant Linear Velocity (Z-CLV or ZCLV). Due to

1387-586: A singular or a plural verb and referred to by a singular or plural pronoun, the singular being generally preferred when referring to the body as a unit and the plural often being preferred, especially in British English, when emphasizing the individual members. Examples of acceptable and unacceptable use given by Gowers in Plain Words include: Concrete nouns refer to physical entities that can, in principle at least, be observed by at least one of

1460-420: A special AVCHD format to hold high definition material (often in conjunction with AVCHD format camcorders ). DVDs containing other types of information may be referred to as DVD data discs. The Oxford English Dictionary comments that, "In 1995, rival manufacturers of the product initially named digital video disc agreed that, in order to emphasize the flexibility of the format for multimedia applications,

1533-401: A specific sex. The gender of a pronoun must be appropriate for the item referred to: "The girl said the ring was from her new boyfriend , but he denied it was from him " (three nouns; and three gendered pronouns: or four, if this her is counted as a possessive pronoun ). A proper noun (sometimes called a proper name , though the two terms normally have different meanings) is

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1606-555: A standard definition CRT TV or an HD flat panel TV with a DVD mechanism under the CRT or on the back of the flat panel, and VCR/DVD combos were also available for purchase. For consumers, DVD soon replaced VHS as the favored choice for home movie releases. In 2001, DVD players outsold VCRs for the first time in the United States. At that time, one in four American households owned a DVD player. By 2007, about 80% of Americans owned

1679-432: A storage capacity of 4.7 GB (4.38 GiB ) for a single-layered, single-sided disc and 8.5 GB (7.92 GiB) for a dual-layered, single-sided disc. The DVD specification ended up similar to Toshiba and Matsushita's Super Density Disc, except for the dual-layer option. MMCD was single-sided and optionally dual-layer, whereas SD was two half-thickness, single-layer discs which were pressed separately and then glued together to form

1752-470: A subclass of nouns parallel to prototypical nouns ). For example, in the sentence "Gareth thought she was weird", the word she is a pronoun that refers to a person just as the noun Gareth does. The word one can replace parts of noun phrases, and it sometimes stands in for a noun. An example is given below: But one can also stand in for larger parts of a noun phrase. For example, in the following example, one can stand in for new car . Nominalization

1825-527: Is a digital optical disc data storage format. It was invented and developed in 1995 and first released on November 1, 1996, in Japan . The medium can store any kind of digital data and has been widely used to store video programs (watched using DVD players ), software and other computer files. DVDs offer significantly higher storage capacity than compact discs (CD) while having the same dimensions. A standard single-layer DVD can store up to 4.7 GB of data,

1898-748: Is a phrase usually headed by a common noun, a proper noun, or a pronoun. The head may be the only constituent, or it may be modified by determiners and adjectives . For example, "The dog sat near Ms Curtis and wagged its tail" contains three NPs: the dog (subject of the verbs sat and wagged ); Ms Curtis (complement of the preposition near ); and its tail (object of wagged ). "You became their teacher" contains two NPs: you (subject of became ); and their teacher . Nouns and noun phrases can typically be replaced by pronouns , such as he, it, she, they, which, these , and those , to avoid repetition or explicit identification, or for other reasons (but as noted earlier, current theory often classifies pronouns as

1971-494: Is a process whereby a word that belongs to another part of speech comes to be used as a noun. This can be a way to create new nouns, or to use other words in ways that resemble nouns. In French and Spanish, for example, adjectives frequently act as nouns referring to people who have the characteristics denoted by the adjective. This sometimes happens in English as well, as in the following examples: For definitions of nouns based on

2044-419: Is available in two formats, General (650 nm) and Authoring (635 nm), where Authoring discs may be recorded with CSS encrypted video content but General discs may not. Dual-layer recording (occasionally called double-layer recording) allows DVD-R and DVD+R discs to store nearly double the data of a single-layer disc—8.5 and 4.7 gigabyte capacities, respectively. The additional capacity comes at

2117-462: Is blank, and the other contains data. Each disc is 0.6 mm thick, and are glued together to form a DVD disc. The gluing process must be done carefully to make the disc as flat as possible to avoid both birefringence and "disc tilt", which is when the disc is not perfectly flat, preventing it from being read. Some specifications for mechanical, physical and optical characteristics of DVD optical discs can be downloaded as freely available standards from

2190-527: Is derived from the Latin term, through the Anglo-Norman nom (other forms include nomme , and noun itself). The word classes were defined partly by the grammatical forms that they take. In Sanskrit, Greek, and Latin, for example, nouns are categorized by gender and inflected for case and number . Because adjectives share these three grammatical categories , adjectives typically were placed in

2263-442: Is little difference between the adverb gleefully and the prepositional phrase with glee . A functional approach defines a noun as a word that can be the head of a nominal phrase, i.e., a phrase with referential function, without needing to go through morphological transformation. Nouns can have a number of different properties and are often sub-categorized based on various of these criteria, depending on their occurrence in

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2336-450: Is lost. Numerous factors affect longevity: composition and quality of the media (recording and substrate layers), humidity and light storage conditions, the quality of the initial recording (which is sometimes a matter of mutual compatibility of media and recorder), etc. According to NIST , "[a] temperature of 64.4 °F (18 °C) and 40% RH [Relative Humidity] would be considered suitable for long-term storage. A lower temperature and RH

2409-496: Is measureable, which means that future data losses caused by deteriorating media can be predicted well in advance by measuring the rate of correctable data errors. Support of measuring the disc quality varies among optical drive vendors and models. DVD-Video is a standard for distributing video/audio content on DVD media. The format went on sale in Japan on November 1, 1996, in the United States on March 24, 1997, to line up with

2482-583: Is recommended for extended-term storage." As with CDs, the information and data storage will begin to degrade over time with most standard DVDs lasting up to 30 years depending on the type of environment they are stored and whether they are full with data. According to the Optical Storage Technology Association (OSTA), "Manufacturers claim lifespans ranging from 30 to 100 years for DVD, DVD-R and DVD+R discs and up to 30 years for DVD-RW, DVD+RW and DVD-RAM." According to

2555-428: Is the explanation provided in a DVD Forum Primer from 2000 and in the DVD Forum 's mission statement, which the purpose is to promote broad acceptance of DVD products on technology, across entertainment, and other industries. Because DVDs became highly popular for the distribution of movies in the 2000s, the term DVD became popularly used in English as a noun to describe specifically a full-length movie released on

2628-505: The 69th Academy Awards that day; in Canada, Central America, and Indonesia later in 1997; and in Europe, Australia, and Africa in 1998. DVD-Video became the dominant form of home video distribution in Japan when it first went on sale on November 1, 1996, but it shared the market for home video distribution in the United States for several years; it was June 15, 2003, when weekly DVD-Video in

2701-562: The ISO website. There are also equivalent European Computer Manufacturers Association (Ecma) standards for some of these specifications, such as Ecma-267 for DVD-ROMs. Also, the DVD+RW Alliance publishes competing recordable DVD specifications such as DVD+R, DVD+R DL, DVD+RW or DVD+RW DL . These DVD formats are also ISO standards. Some DVD specifications (e.g. for DVD-Video) are not publicly available and can be obtained only from

2774-612: The Optical Storage Technology Association (OSTA) on the use of their implementation of the ISO-13346 file system (known as Universal Disk Format ) for use on the new DVDs. The format's details were finalized on December 8, 1995. In November 1995, Samsung announced it would start mass-producing DVDs by September 1996. The format launched on November 1, 1996, in Japan, mostly with music video releases. The first major releases from Warner Home Video arrived on December 20, 1996, with four titles being available. The format's release in

2847-521: The format war of 2006–2008 . A dual layer HD DVD can store up to 30 GB and a dual layer Blu-ray disc can hold up to 50 GB. However, unlike previous format changes, e.g., vinyl to Compact Disc or VHS videotape to DVD, initially there was no immediate indication that production of the standard DVD will gradually wind down, as at the beginning of the 2010s they still dominated, with around 75% of video sales and approximately one billion DVD player sales worldwide as of April 2011. In fact, experts claimed that

2920-419: The head of a noun phrase . According to traditional and popular classification, pronouns are distinct from nouns, but in much modern theory they are considered a subclass of nouns. Every language has various linguistic and grammatical distinctions between nouns and verbs . Word classes (parts of speech) were described by Sanskrit grammarians from at least the 5th century BC. In Yāska 's Nirukta ,

2993-441: The senses ( chair , apple , Janet , atom ), as items supposed to exist in the physical world. Abstract nouns , on the other hand, refer to abstract objects : ideas or concepts ( justice , anger , solubility , duration ). Some nouns have both concrete and abstract meanings: art usually refers to something abstract ("Art is important in human culture"), but it can also refer to a concrete item ("I put my daughter's art up on

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3066-443: The sex or social gender of the noun's referent, particularly in the case of nouns denoting people (and sometimes animals), though with exceptions (the feminine French noun personne can refer to a male or a female person). In Modern English, even common nouns like hen and princess and proper nouns like Alicia do not have grammatical gender (their femininity has no relevance in syntax), though they denote persons or animals of

3139-465: The DVD Book assigns them distinct disc types. DVD-14 has no analogous 8 cm type. The comparative data for 8 cm discs is provided further down. HP initially developed recordable DVD media from the need to store data for backup and transport. DVD recordables are now also used for consumer audio and video recording. Three formats were developed: DVD-R / RW , DVD+R / RW (plus), and DVD-RAM . DVD-R

3212-671: The DVD Format/Logo Licensing Corporation (DVD FLLC) for a fee of US$ 5000. Every subscriber must sign a non-disclosure agreement as certain information on the DVD Books is proprietary and confidential. Borrowing from the LaserDisc format, the DVD standard includes DVD-10 discs (Type B in ISO) with two recorded data layers such that only one layer is accessible from either side of the disc. This doubles

3285-500: The DVD would remain the dominant medium for at least another five years as Blu-ray technology was still in its introductory phase, write and read speeds being poor and necessary hardware being expensive and not readily available. Consumers initially were also slow to adopt Blu-ray due to the cost. By 2009, 85% of stores were selling Blu-ray Discs. A high-definition television and appropriate connection cables are also required to take advantage of Blu-ray disc. Some analysts suggested that

3358-462: The U.S. was delayed multiple times, from August 1996, to October 1996, November 1996, before finally settling on early 1997. Players began to be produced domestically that winter, with March 24, 1997, as the U.S. launch date of the format proper in seven test markets. Approximately 32 titles were available on launch day, mainly from the Warner Bros. , MGM , and New Line libraries, with

3431-456: The United States rentals began outnumbering weekly VHS cassette rentals. DVD-Video is still the dominant form of home video distribution worldwide except for in Japan where it was surpassed by Blu-ray Disc when Blu-ray first went on sale in Japan on March 31, 2006. The purpose of CSS is twofold: In 2006, two new formats called HD DVD and Blu-ray Disc were released as the successor to DVD. HD DVD competed unsuccessfully with Blu-ray Disc in

3504-759: The adjectives happy and serene ; circulation from the verb circulate ). Illustrating the wide range of possible classifying principles for nouns, the Awa language of Papua New Guinea regiments nouns according to how ownership is assigned: as alienable possession or inalienable possession. An alienably possessed item (a tree, for example) can exist even without a possessor. But inalienably possessed items are necessarily associated with their possessor and are referred to differently, for example with nouns that function as kin terms (meaning "father", etc.), body-part nouns (meaning "shadow", "hair", etc.), or part–whole nouns (meaning "top", "bottom", etc.). A noun phrase (or NP )

3577-559: The biggest obstacle to replacing DVD was due to its installed base; a large majority of consumers were satisfied with DVDs. DVDs started to face competition from video on demand services around 2015. With increasing numbers of homes having high speed Internet connections, many people had the option to either rent or buy video from an online service, and view it by streaming it directly from that service's servers, meaning they no longer need any form of permanent storage media for video at all. By 2017, digital streaming services had overtaken

3650-401: The definite article is le for masculine nouns and la for feminine; adjectives and certain verb forms also change (sometimes with the simple addition of -e for feminine). Grammatical gender often correlates with the form of the noun and the inflection pattern it follows; for example, in both Italian and Romanian most nouns ending in  -a are feminine. Gender can also correlate with

3723-481: The developers of the DVD format and eventually the first company to actually release a DVD-based console. Game consoles such as the PlayStation 2 , Xbox , and Xbox 360 use DVDs as their source medium for games and other software. Contemporary games for Windows were also distributed on DVD. Early DVDs were mastered using DLT tape, but using DVD-R DL or +R DL eventually became common. TV DVD combos , combining

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3796-525: The following, an asterisk (*) in front of an example means that this example is ungrammatical. Nouns have sometimes been characterized in terms of the grammatical categories by which they may be varied (for example gender , case , and number ). Such definitions tend to be language-specific, since different languages may apply different categories. Nouns are frequently defined, particularly in informal contexts, in terms of their semantic properties (their meanings). Nouns are described as words that refer to

3869-892: The format's life, larger data buffers and faster optical pickups in DVD players made layer transitions effectively invisible regardless of mastering. Dual-layer DVDs are recorded using Opposite Track Path (OTP). The DVD Book also permits an additional disc type called DVD-14: a hybrid double-sided disc with one dual-layer side, one single-layer side, and a total nominal capacity of 12.3 GB. DVD-14 has no counterpart in ISO. Both of these additional disc types are extremely rare due to their complicated and expensive manufacturing. For this reason, some DVDs that were initially issued as double-sided discs were later pressed as two-disc sets. Note : The above sections regarding disc types pertain to 12 cm discs. The same disc types exist for 8 cm discs: ISO standards still regard these discs as Types A–D, while

3942-442: The format; for example the sentence to "watch a DVD" describes watching a movie on DVD. Released in 1987, CD Video used analog video encoding on optical discs matching the established standard 120 mm (4.7 in) size of audio CDs. Video CD (VCD) became one of the first formats for distributing digitally encoded films in this format, in 1993. In the same year, two new optical disc storage formats were being developed. One

4015-474: The forms that are derived from them (the common noun in "he's an Albanian "; the adjectival forms in "he's of Albanian heritage" and " Newtonian physics", but not in " pasteurized milk"; the second verb in "they sought to Americanize us"). Count nouns or countable nouns are common nouns that can take a plural , can combine with numerals or counting quantifiers (e.g., one , two , several , every , most ), and can take an indefinite article such as

4088-482: The fridge"). A noun might have a literal (concrete) and also a figurative (abstract) meaning: "a brass key " and "the key to success"; "a block in the pipe" and "a mental block ". Similarly, some abstract nouns have developed etymologically by figurative extension from literal roots ( drawback , fraction , holdout , uptake ). Many abstract nouns in English are formed by adding a suffix ( -ness , -ity , -ion ) to adjectives or verbs ( happiness and serenity from

4161-459: The ground up. By the beginning of the 2020s, sales of DVD had dropped 86% with respect to the peak of DVD sales around 2005, while on-demand sales and, overall, subscription streaming of TV shows and movies grew by over 1,200%. At its peak, DVD sales represented almost two thirds of video market in the US; approximately 15 years later, around 2020, they fell to only 10% of the market. By 2022, there

4234-428: The notable inclusion of the 1996 film Twister . However, the launch was planned for the following day (March 25), leading to a distribution change with retailers and studios to prevent similar violations of breaking the street date . The nationwide rollout for the format happened on August 22, 1997. DTS announced in late 1997 that they would be coming onto the format. The sound system company revealed details in

4307-596: The noun ( nāma ) is one of the four main categories of words defined. The Ancient Greek equivalent was ónoma (ὄνομα), referred to by Plato in the Cratylus dialog , and later listed as one of the eight parts of speech in The Art of Grammar , attributed to Dionysius Thrax (2nd century BC). The term used in Latin grammar was nōmen . All of these terms for "noun" were also words meaning "name". The English word noun

4380-467: The nouns present those entities. Many nouns have both countable and uncountable uses; for example, soda is countable in "give me three sodas", but uncountable in "he likes soda". Collective nouns are nouns that – even when they are treated in their morphology and syntax as singular – refer to groups consisting of more than one individual or entity. Examples include committee , government , and police . In English these nouns may be followed by

4453-451: The original film recordings. Shows that were made between the early 1980s and the early 2000s were generally shot on film, then transferred to video tape, and then edited natively in either NTSC or PAL; this makes high-definition transfers impossible, as these SD standards were baked into the final cuts of the episodes. Star Trek: The Next Generation was the only such show that had a Blu-ray release, as prints were re-scanned and edited from

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4526-399: The preferred abbreviation DVD would be understood to denote digital versatile disc." The OED also states that in 1995, "The companies said the official name of the format will simply be DVD. Toshiba had been using the name 'digital video disc', but that was switched to 'digital versatile disc' after computer companies complained that it left out their applications." "Digital versatile disc"

4599-412: The sales of DVDs and Blu-rays for the first time. Until the end of the 2010s, manufacturers continued to release standard DVD titles as of 2020 , and the format remained the preferred one for the release of older television programs and films. Shows that were shot and edited entirely on film, such as Star Trek: The Original Series , could not be released in high definition without being re-scanned from

4672-458: The same class as nouns. Similarly, the Latin term nōmen includes both nouns (substantives) and adjectives, as originally did the English word noun , the two types being distinguished as nouns substantive and nouns adjective (or substantive nouns and adjective nouns , or simply substantives and adjectives ). (The word nominal is now sometimes used to denote a class that includes both nouns and adjectives.) Many European languages use

4745-414: The same side—instead of proposal SD 10, which would have created a two-sided disc that users would have to turn over. Philips/Sony strongly insisted on the source code, EFMPlus , that Kees Schouhamer Immink had designed for the MMCD, because it makes it possible to apply the existing CD servo technology. Its drawback was a loss from 5 to 4.7 Gbyte of capacity. As a result, the DVD specification provided

4818-663: The slightly lower data density of dual layer DVDs (4.25 GB instead of 4.7 GB per layer), the required rotation speed is around 10% faster for the same data rate, which means that the same angular speed rating equals a 10% higher physical angular rotation speed. For that reason, the increase of reading speeds of dual layer media has stagnated at 12× ( constant angular velocity ) for half-height optical drives released since around 2005, and slim type optical drives are only able to record dual layer media at 6× (constant angular velocity), while reading speeds of 8× are still supported by such. The quality and data integrity of optical media

4891-461: The start of this article), but this could not apply in Russian , which has no definite articles. In some languages common and proper nouns have grammatical gender, typically masculine, feminine, and neuter. The gender of a noun (as well as its number and case, where applicable) will often require agreement in words that modify or are used along with it. In French for example, the singular form of

4964-525: The tools and codecs featured on the site, such as FairUse4WM . The VirtualDubMod project began after many modifications to VirtualDub were posted on the Doom9 forums. Doom9 gained notoriety as a result of its involvement in the AACS encryption key controversy . The utility BackupHDDVD was first posted by a Doom9 poster using the alias muslix64 . The earliest information on how to find title and volume keys

5037-416: The total nominal capacity of a DVD-10 disc to 9.4 GB (8.75 GiB), but each side is locked to 4.7 GB. Like DVD-5 discs, DVD-10 discs are defined as single-layer (SL) discs. DVD hardware accesses the additional layer (layer 1) by refocusing the laser through an otherwise normally-placed, semitransparent first layer (layer 0). This laser refocus—and the subsequent time needed to reacquire laser tracking—can cause

5110-430: The ubiquitous VHS tape as the primary consumer video distribution format. Immediately following the formal adoption of a unified standard for DVD, two of the four leading video game console companies ( Sega and The 3DO Company ) said they already had plans to design a gaming console with DVDs as the source medium. Sony stated at the time that they had no plans to use DVD in their gaming systems, despite being one of

5183-660: Was also first revealed on Doom9 forums, by other users. The key that set off the controversy was also first posted by a user using the name arnezami . Doom9 is also known for being the main discussion forum for many major video encoding tools, such as x264 , AviSynth and MeGUI . Due to the concentration of forum members who have technical backgrounds, there have been various software projects developed and maintained by forum members. These include: Doom9 members have also contributed significantly to various software projects, including: DVD The DVD (common abbreviation for digital video disc or digital versatile disc )

5256-413: Was an increased demand of high definition media, where Ultra HD Blu-ray and regular Blu-ray formats made up for almost half of the US market while sales of physical media continued to shrink in favor of streaming services. Longevity of a storage medium is measured by how long the data remains readable, assuming compatible devices exist that can read it: that is, how long the disc can be stored until data

5329-872: Was the Multimedia Compact Disc (MMCD), backed by Philips and Sony (developers of the CD and CD-i ), and the other was the Super Density (SD) disc, supported by Toshiba , Time Warner , Matsushita Electric , Hitachi , Mitsubishi Electric , Pioneer , Thomson , and JVC . By the time of the press launches for both formats in January 1995, the MMCD nomenclature had been dropped, and Philips and Sony were referring to their format as Digital Video Disc (DVD). On May 3, 1995, an ad hoc , industry technical group formed from five computer companies (IBM, Apple, Compaq , Hewlett-Packard , and Microsoft) issued

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