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107-481: Sun NXT (read as "Sun Next") is an Indian subscription video on demand over-the-top streaming service run by Sun TV Network . It was launched in June 2017 and has content in six languages - Tamil , Telugu , Malayalam , Kannada , Bengali , Marathi and Hindi . Sun NXT app is available for Android and iOS devices, Smart TVs and other devices. The service was launched in June 2017. Within four days of its launch,

214-684: A spindle that holds flat circular disks, called platters , which hold the recorded data. The platters are made from a non-magnetic material, usually aluminum alloy , glass , or ceramic . They are coated with a shallow layer of magnetic material typically 10–20 nm in depth, with an outer layer of carbon for protection. For reference, a standard piece of copy paper is 0.07–0.18 mm (70,000–180,000 nm) thick. The platters in contemporary HDDs are spun at speeds varying from 4200  rpm in energy-efficient portable devices, to 15,000 rpm for high-performance servers. The first HDDs spun at 1,200 rpm and, for many years, 3,600 rpm

321-501: A DEC Alpha –based computer for its VOD servers, allowing it to support more than a million users. By 1994 the Oracle scalable VOD system used massively parallel processors to support from 500 to 30,000 users. The SGI system supported 4,000 users. The servers connected to networks of increasing size to eventually support video stream delivery to entire cities. In the UK, from September 1994,

428-522: A stepper motor . Early hard disk drives wrote data at some constant bits per second, resulting in all tracks having the same amount of data per track, but modern drives (since the 1990s) use zone bit recording , increasing the write speed from inner to outer zone and thereby storing more data per track in the outer zones. In modern drives, the small size of the magnetic regions creates the danger that their magnetic state might be lost because of thermal effects ⁠ ⁠— thermally induced magnetic instability which

535-563: A subscription model that requires users to pay a monthly fee for access to a selection of movies, television shows, and original series. In contrast, YouTube , another Internet-based VOD system, uses an advertising-funded model in which users can access most of its video content free of charge but must pay a subscription fee for premium content. Some airlines offer VOD services as in-flight entertainment to passengers through video screens embedded in seats or externally provided portable media players. Downloading and streaming VOD systems provide

642-575: A subscription business model in which subscribers are charged a regular fee to access unlimited programs. Examples of these services include Netflix , Hulu , Amazon Prime Video , Max , Disney+ , Peacock , Paramount+ , Apple TV+ , Disney+ Hotstar , iQIYI , Star+ , Hayu , BET+ , Discovery+ , Crunchyroll , SonyLIV , ZEE5 , and GulliMax . Near video on demand (NVOD) is a pay-per-view consumer video technique used by multi-channel broadcasters using high-bandwidth distribution mechanisms such as satellite and cable television. Multiple copies of

749-416: A "stopgap" technology between PMR and Seagate's intended successor heat-assisted magnetic recording (HAMR). SMR utilises overlapping tracks for increased data density, at the cost of design complexity and lower data access speeds (particularly write speeds and random access 4k speeds). By contrast, HGST (now part of Western Digital ) focused on developing ways to seal helium -filled drives instead of

856-531: A 20-year deal to stream movies on demand over Enron's fiber-optic network. The heavily promoted deal failed, with Enron's share prices dropping following the announcement. In 1998, Kingston Communications became the first UK company to launch a fully commercial VOD service and the first to integrate broadcast television and Internet access through a single set-top box using IP delivery over ADSL. By 2001, Kingston Interactive TV had attracted 15,000 subscribers. After several trials, Home Choice followed in 1999 but

963-717: A DVR rented or purchased from the provider, or to a PC or to a portable device for deferred viewing. Streaming media has emerged as an increasingly popular medium of VOD provision over downloading, including BitTorrent . Desktop client applications such as the Apple iTunes online content store and Smart TV apps such as Amazon Prime Video allow temporary rentals and purchases of video entertainment content. Other Internet-based VOD systems provide users with access to bundles of video entertainment content rather than individual movies and shows. The most common of these systems, Netflix , Hulu , Disney+ , Peacock , Max and Paramount+ , use

1070-582: A Field Generation Layer (FGL) and a Spin Injection Layer (SIL), and the FGL produces a magnetic field using spin-polarised electrons originating in the SIL, which is a form of spin torque energy. A typical HDD has two electric motors: a spindle motor that spins the disks and an actuator (motor) that positions the read/write head assembly across the spinning disks. The disk motor has an external rotor attached to

1177-648: A VOD service formed a major part of the Cambridge Digital Interactive Television Trial. This provided video and data to 250 homes and several schools connected to the Cambridge Cable network, later part of NTL, now Virgin Media . The MPEG-1 encoded video was streamed over an ATM network from an ICL media server to set-top boxes designed by Acorn Online Media. The trial commenced at a speed of 2 Mbit/s to

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1284-418: A bit cell comprising about 18 magnetic grains (11 by 1.6 grains). Since the mid-2000s, areal density progress has been challenged by a superparamagnetic trilemma involving grain size, grain magnetic strength and ability of the head to write. In order to maintain acceptable signal-to-noise, smaller grains are required; smaller grains may self-reverse ( electrothermal instability ) unless their magnetic strength

1391-489: A breather port, unlike their air-filled counterparts. Other recording technologies are either under research or have been commercially implemented to increase areal density, including Seagate's heat-assisted magnetic recording (HAMR). HAMR requires a different architecture with redesigned media and read/write heads, new lasers, and new near-field optical transducers. HAMR is expected to ship commercially in late 2024, after technical issues delayed its introduction by more than

1498-449: A component of the IBM 305 RAMAC system. It was approximately the size of two large refrigerators and stored five million six-bit characters (3.75 megabytes ) on a stack of 52 disks (100 surfaces used). The 350 had a single arm with two read/write heads, one facing up and the other down, that moved both horizontally between a pair of adjacent platters and vertically from one pair of platters to

1605-498: A copper telephone cable to provide a VOD service of acceptable quality as the required bandwidth of a digital television signal is around 200   Mbps , which is 2,000 times greater than the bandwidth of a speech signal over a copper telephone wire. VOD services were only made possible as a result of two major technological developments: MPEG ( motion-compensated DCT ) video compression and asymmetric digital subscriber line (ADSL) data transmission. Plans such as those of

1712-1087: A decade, from earlier projections as early as 2009. HAMR's planned successor, bit-patterned recording (BPR), has been removed from the roadmaps of Western Digital and Seagate. Western Digital's microwave-assisted magnetic recording (MAMR), also referred to as energy-assisted magnetic recording (EAMR), was sampled in 2020, with the first EAMR drive, the Ultrastar HC550, shipping in late 2020. Two-dimensional magnetic recording (TDMR) and "current perpendicular to plane" giant magnetoresistance (CPP/GMR) heads have appeared in research papers. Some drives have adopted dual independent actuator arms to increase read/write speeds and compete with SSDs. A 3D-actuated vacuum drive (3DHD) concept and 3D magnetic recording have been proposed. Depending upon assumptions on feasibility and timing of these technologies, Seagate forecasts that areal density will grow 20% per year during 2020–2034. The highest-capacity HDDs shipping commercially in 2024 are 32 TB. The capacity of

1819-552: A few months. PVOD made a return during the COVID-19 pandemic and the resulting global closures of cinemas . Certain films that had already been released including The Invisible Man were quickly also released on VOD platforms for a higher rental price than usual, while other films including Trolls World Tour were released simultaneously on PVOD and in drive-in theaters , or in some cases directly to PVOD only. In most cases, these PVOD releases are offered through most of

1926-515: A large subscriber base and being one of the largest OTTs in India, the platform is supposedly earning most of its revenue on the contractual basis of content sharing with partnership of network companies and not from the actual subscription from the subscribers as most of them refrain to subscribe and access only the free content. The parent company, Sun Group, is planning to invest more into the service by producing original in-house movies and series. At

2033-456: A legal peer-to-peer approach based on Kontiki technology to provide very-high-capacity multi-point downloads of the video content. Instead of the video content all being downloaded from Sky's servers, the content comes from multiple users of the system who have already downloaded the content. Other UK television broadcasters implemented their own versions of the same technology, such as Channel 4 's 4oD (4 on Demand, now known as All 4 ) which

2140-738: A piece of content once purchased via the Internet; and download to rent (DTR), by which customers can access the content for a limited time upon renting. Examples of TVOD services include the Apple iTunes Store and the Google Play Store, as well as VOD rental services offered through multichannel television (i.e., cable or satellite) providers. Premium video on demand (PVOD) is a version of TVOD which allows customers to access video-on-demand content several weeks or months earlier than their customary TVOD or home video availability – often feature films made available alongside, or in place of,

2247-415: A programme are broadcast at short time intervals (typically staggered on a schedule of every 10–20 minutes) on linear channels providing convenience for viewers, who can watch the programme without needing to tune in at the only scheduled point in time. A viewer may only have to wait a few minutes before the next time a movie will be programmed. This form is bandwidth-intensive, reduces the number of channels

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2354-638: A provider can offer, and is generally provided by large operators with a great deal of redundant capacity. This concept has been reduced in popularity as video on demand is implemented, along with providers often wanting to provide the maximum throughput for their broadband services possible. Only the satellite services DirecTV and Dish Network continue to provide NVOD services, as they do not offer broadband and much of their rural customer base only has access to slower dial-up and non- 5G wireless and satellite internet options which cannot stream films or have onerous data caps (and where possible, AT&T

2461-475: A removable disk module, which included both the disk pack and the head assembly, leaving the actuator motor in the drive upon removal. Later "Winchester" drives abandoned the removable media concept and returned to non-removable platters. In 1974, IBM introduced the swinging arm actuator, made feasible because the Winchester recording heads function well when skewed to the recorded tracks. The simple design of

2568-538: A second set. Variants of the IBM 350 were the IBM 355 , IBM 7300 and IBM 1405 . In 1961, IBM announced, and in 1962 shipped, the IBM ;1301 disk storage unit, which superseded the IBM 350 and similar drives. The 1301 consisted of one (for Model 1) or two (for model 2) modules, each containing 25 platters, each platter about 1 ⁄ 8 -inch (3.2 mm) thick and 24 inches (610 mm) in diameter. While

2675-414: A set-top box with a one-terabyte hard drive that could be used for video-on-demand services previously offered through cable television and broadband. A movie, for example, could be sent out once using a broadcast signal rather than numerous times over cable or fiber-optic lines, and this would not involve the expense of adding many miles of lines. Sezmi planned to lease part of the broadcast spectrum to offer

2782-433: A subscription service that National Association of Broadcasters President Gordon H. Smith said would provide a superior picture to that of cable or satellite at a lower cost. Developing VOD requires extensive negotiations to identify a financial model that would serve both content creators and cable providers while providing desirable content for viewers at an acceptable price point. Key factors identified for determining

2889-865: A subscription to the Disney+ streaming service, but they then retain access as long as they maintain their subscription (for Mulan , this was effectively a 90-day rental, as the film became available to all Disney+ subscribers at no extra charge in December). It has been reported that the pandemic had contributed to a transformation in movie distribution in favor of PVOD over traditional movie houses, as studios were able to realize 80% of revenue through PVOD versus 50% of traditional theater box office receipts. Theater owners including AMC and Cinemark, as well as suppliers including IMAX and National CineMedia, all experienced significant drops in revenues during shutdowns related to COVID-19. Subscription VOD ( SVOD ) services use

2996-616: A swing arm drive, the IBM 0680 (Piccolo), with eight inch platters, exploring the possibility that smaller platters might offer advantages. Other eight inch drives followed, then 5 + 1 ⁄ 4  in (130 mm) drives, sized to replace the contemporary floppy disk drives . The latter were primarily intended for the then fledgling personal computer (PC) market. Over time, as recording densities were greatly increased, further reductions in disk diameter to 3.5" and 2.5" were found to be optimum. Powerful rare earth magnet materials became affordable during this period, and were complementary to

3103-475: A system of digital video recorders to simulate the video-on-demand experience. Most of Edge Spectrum's channels, where they are on air, carry televangelism . Push video on demand is so-named because the provider "pushes" the content out to the viewer's set-top box without the viewer having requested the content. This technique is used by several broadcasters on systems that lack the connectivity and bandwidth to provide true "streaming" video on demand. Push VOD

3210-423: A thin film of ferromagnetic material on both sides of a disk. Sequential changes in the direction of magnetization represent binary data bits . The data is read from the disk by detecting the transitions in magnetization. User data is encoded using an encoding scheme, such as run-length limited encoding, which determines how the data is represented by the magnetic transitions. A typical HDD design consists of

3317-499: A tiny fraction of the detected errors end up as not correctable. Examples of specified uncorrected bit read error rates include: Within a given manufacturers model the uncorrected bit error rate is typically the same regardless of capacity of the drive. The worst type of errors are silent data corruptions which are errors undetected by the disk firmware or the host operating system; some of these errors may be caused by hard disk drive malfunctions while others originate elsewhere in

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3424-470: A traditional set-top box or through remote devices such as computers, tablets, and smartphones. VOD users may also permanently download content to a device such as a computer, digital video recorder (DVR) or, a portable media player for continued viewing. The majority of cable and telephone company –based television providers offer VOD streaming, whereby a user selects a video programme that begins to play immediately (i.e., streaming), or downloading to

3531-411: A traditional release in movie theaters – but at a much higher price point. A version of the model was tested in 2011 by American satellite TV provider DirecTV under the brand name "Home Premiere", which allowed viewers to rent select films from major studios for US$ 30 per rental as soon as 60 days after they debuted in cinemas, compared to 120 days for the regular TVOD window; this version only lasted

3638-730: A type of non-volatile storage , retaining stored data when powered off. Modern HDDs are typically in the form of a small rectangular box . Hard disk drives were introduced by IBM in 1956, and were the dominant secondary storage device for general-purpose computers beginning in the early 1960s. HDDs maintained this position into the modern era of servers and personal computers , though personal computing devices produced in large volume, like mobile phones and tablets , rely on flash memory storage devices. More than 224 companies have produced HDDs historically , though after extensive industry consolidation, most units are manufactured by Seagate , Toshiba , and Western Digital . HDDs dominate

3745-493: A user to view content. This technology also provides an advantage for technology companies for data analysis of viewed content from consumers. By analyzing data of what is viewed most by consumers, companies can purchase more content that is aimed for an audience, and then in-turn market products that are based on what viewer profiles are of a group of consumers who viewer a specific amount of content. This data analysis will often provide researchers valuable data that includes: what

3852-694: Is a cable VOD service that also offers pay-per-view. Once the programs have been downloaded onto a user's PVR, he or she can watch, play, pause, and seek at their convenience. VOD is also common in expensive hotels. According to the European Audiovisual Observatory , 142 paying VOD services were operational in Europe at the end of 2006. The number increased to 650 by 2009. At the 2010 Consumer Electronics Show in Las Vegas, Nevada , Sezmi CEO Buno Pati and president Phil Wiser showed

3959-603: Is a device that is Internet capable. Cable media companies have combined VOD with live streaming services. The early-2020s launches of apps from cable companies (e.g., NBC 's Peacock , CBS 's Paramount+ ) are attempts to compete with Subscription Video on Demand (SVOD) services because they lack live news and sports content. Streaming video servers can serve a wide community via a WAN , but responsiveness may be reduced. Download VOD services are practical in homes equipped with cable modems or DSL connections. Servers for traditional cable and telco VOD services are usually placed at

4066-435: Is also used by broadcasters that want to optimize their video streaming infrastructures by pre-loading the most popular contents to the consumers' set-top device. If the consumer requests one of these films, it is already loaded on her or his DVR. A push VOD system uses a personal video recorder (PVR) to store a selection of content, often transmitted in spare capacity overnight or all day long at low bandwidth. Users can watch

4173-476: Is an electro-mechanical data storage device that stores and retrieves digital data using magnetic storage with one or more rigid rapidly rotating platters coated with magnetic material. The platters are paired with magnetic heads , usually arranged on a moving actuator arm, which read and write data to the platter surfaces. Data is accessed in a random-access manner, meaning that individual blocks of data can be stored and retrieved in any order. HDDs are

4280-446: Is capable of scheduling reads and writes efficiently on the platter surfaces and remapping sectors of the media that have failed. Modern drives make extensive use of error correction codes (ECCs), particularly Reed–Solomon error correction . These techniques store extra bits, determined by mathematical formulas, for each block of data; the extra bits allow many errors to be corrected invisibly. The extra bits themselves take up space on

4387-590: Is commonly known as the " superparamagnetic limit ". To counter this, the platters are coated with two parallel magnetic layers, separated by a three-atom layer of the non-magnetic element ruthenium , and the two layers are magnetized in opposite orientation, thus reinforcing each other. Another technology used to overcome thermal effects to allow greater recording densities is perpendicular recording (PMR), first shipped in 2005, and as of 2007 , used in certain HDDs. Perpendicular recording may be accompanied by changes in

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4494-669: Is improving faster than HDDs. NAND has a higher price elasticity of demand than HDDs, and this drives market growth. During the late 2000s and 2010s, the product life cycle of HDDs entered a mature phase, and slowing sales may indicate the onset of the declining phase. The 2011 Thailand floods damaged the manufacturing plants and impacted hard disk drive cost adversely between 2011 and 2013. In 2019, Western Digital closed its last Malaysian HDD factory due to decreasing demand, to focus on SSD production. All three remaining HDD manufacturers have had decreasing demand for their HDDs since 2014. A modern HDD records data by magnetizing

4601-418: Is increased, but known write head materials are unable to generate a strong enough magnetic field sufficient to write the medium in the increasingly smaller space taken by grains. Magnetic storage technologies are being developed to address this trilemma, and compete with flash memory –based solid-state drives (SSDs). In 2013, Seagate introduced shingled magnetic recording (SMR), intended as something of

4708-583: Is now prioritizing their streaming service AT&T TV , which utilizes a fully immediate VOD experience, over DirecTV ). Before the rise of VOD, the cable pay-per-view provider In Demand provided up to 40 channels in 2002, with several films receiving four channels on a staggered schedule to provide the NVOD experience for viewers. As of 2018, most cable pay-per-view channels now number mainly 3–5, and are used mainly for live ring sports events (boxing and professional wrestling), comedy specials, and concerts, though

4815-460: Is shaped rather like an arrowhead and is made of doubly coated copper magnet wire . The inner layer is insulation, and the outer is thermoplastic, which bonds the coil together after it is wound on a form, making it self-supporting. The portions of the coil along the two sides of the arrowhead (which point to the center of the actuator bearing) then interact with the magnetic field of the fixed magnet. Current flowing radially outward along one side of

4922-588: Is specified in unit prefixes corresponding to powers of 1000: a 1- terabyte (TB) drive has a capacity of 1,000 gigabytes , where 1 gigabyte = 1 000 megabytes = 1 000 000 kilobytes (1 million) = 1 000 000 000 bytes (1 billion). Typically, some of an HDD's capacity is unavailable to the user because it is used by the file system and the computer operating system , and possibly inbuilt redundancy for error correction and recovery. There can be confusion regarding storage capacity, since capacities are stated in decimal gigabytes (powers of 1000) by HDD manufacturers, whereas

5029-645: The Apple Macintosh . Many Macintosh computers made between 1986 and 1998 featured a SCSI port on the back, making external expansion simple. Older compact Macintosh computers did not have user-accessible hard drive bays (indeed, the Macintosh 128K , Macintosh 512K , and Macintosh Plus did not feature a hard drive bay at all), so on those models, external SCSI disks were the only reasonable option for expanding upon any internal storage. HDD improvements have been driven by increasing areal density , listed in

5136-714: The Digital Cinema Initiative , in 2002. The BBC, ITV and Channel 4 planned to launch a joint platform provisionally called Kangaroo in 2008. This was abandoned in 2009 following complaints, which were investigated by the Competition Commission . In that same year, the assets of the now-defunct Kangaroo project were acquired by Arqiva , who used the technology to launch the SeeSaw service in February 2010. A year later, however, SeeSaw

5243-510: The Laservision media format and featured a jukebox -like media handling system involving players served by disc carousels, with twelve such handler units capable of serving up to 6,000 customers. Other early VOD systems used tapes as the real-time source of video streams. GTE started as a trial in 1990, with AT&T providing all components. By 1992, VOD servers were supplying previously encoded digital video from disks and DRAM . In

5350-496: The Roku Channel, Samsung TV Plus , Amazon Freevee , Popcornflix , Crackle , Tubi , Movies Anywhere , Vudu , Dailymotion , and YouTube . Walmart is adding ASVOD original programming to Vudu, and YouTube Originals will be ASVOD by 2020. Data analysis When technology companies, include SVOD apps on their devices, like phones, tablets, televisions, game systems, computers, this can remove an attitude obstruction for

5457-572: The Shannon limit and thus provide the highest storage density available. Typical hard disk drives attempt to "remap" the data in a physical sector that is failing to a spare physical sector provided by the drive's "spare sector pool" (also called "reserve pool"), while relying on the ECC to recover stored data while the number of errors in a bad sector is still low enough. The S.M.A.R.T ( Self-Monitoring, Analysis and Reporting Technology ) feature counts

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5564-526: The HDD, but allow higher recording densities to be employed without causing uncorrectable errors, resulting in much larger storage capacity. For example, a typical 1  TB hard disk with 512-byte sectors provides additional capacity of about 93  GB for the ECC data. In the newest drives, as of 2009 , low-density parity-check codes (LDPC) were supplanting Reed–Solomon; LDPC codes enable performance close to

5671-481: The IBM GV (Gulliver) drive, invented at IBM's UK Hursley Labs, became IBM's most licensed electro-mechanical invention of all time, the actuator and filtration system being adopted in the 1980s eventually for all HDDs, and still universal nearly 40 years and 10 billion arms later. Like the first removable pack drive, the first "Winchester" drives used platters 14 inches (360 mm) in diameter. In 1978, IBM introduced

5778-626: The Integrated Network System, a national high-capacity fibre-optic network supporting a range of broadband services in Japan, noted in a more general 1986 publication, were interpreted as conducive to eventual VOD deployment. However, early VOD trials employed existing cable television infrastructure, notably British Telecom's video library trial, operated through the Westminster Cable Company. This trial used

5885-675: The US, the 1982 anti-trust break-up of AT&T resulted in several smaller telephone companies nicknamed Baby Bells . Following this, the Cable Communications Policy Act of 1984 prohibited telephone companies from providing video services within their operating regions. In 1993, the National Communication and Information Infrastructure (NII) was proposed and passed by the US House and Senate, opening

5992-431: The app had obtained 1.1 million downloads. By November it was about seven million. By August 2019, Sun TV Network had planned to invest ₹150 crore in the platform over 18 months. By February 2020, the platform's subscriber base grew to about 15 million users and started making a profit. By the end of 2019, its subscriber base grew to 20 million. It currently has more than 4000 Movies and 30 Live TV Channels. Despite having

6099-443: The arrowhead and radially inward on the other produces the tangential force . If the magnetic field were uniform, each side would generate opposing forces that would cancel each other out. Therefore, the surface of the magnet is half north pole and half south pole, with the radial dividing line in the middle, causing the two sides of the coil to see opposite magnetic fields and produce forces that add instead of canceling. Currents along

6206-400: The cable head-end, serving a particular market, and cable hubs in larger markets. In the telco world, they are placed in either the central office or a newly created location called a Video Head-End Office (VHO). VOD services first appeared in the early 1990s. Until then, it was not thought possible that a television programme could be squeezed into the limited telecommunication bandwidth of

6313-450: The case of embedded servo, otherwise known as sector servo technology). The servo feedback optimizes the signal-to-noise ratio of the GMR sensors by adjusting the voice coil motor to rotate the arm. A more modern servo system also employs milli and/or micro actuators to more accurately position the read/write heads. The spinning of the disks uses fluid-bearing spindle motors. Modern disk firmware

6420-441: The connection between the drive and the host. The rate of areal density advancement was similar to Moore's law (doubling every two years) through 2010: 60% per year during 1988–1996, 100% during 1996–2003 and 30% during 2003–2010. Speaking in 1997, Gordon Moore called the increase "flabbergasting", while observing later that growth cannot continue forever. Price improvement decelerated to −12% per year during 2010–2017, as

6527-551: The content to other streaming services and, temporarily, make extra income like that too. In a reflection made by 2013 Netflix Chief Content Officer, Ted Sarandos , he was quoted saying, "When we launch in a territory the BitTorrent traffic drops as the Netflix traffic grows." This can be valuably interpreted as in that online piracy numbers drop the more that SVOD companies grow, which in turn means more revenue going back to

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6634-449: The disks; the stator windings are fixed in place. Opposite the actuator at the end of the head support arm is the read-write head; thin printed-circuit cables connect the read-write heads to amplifier electronics mounted at the pivot of the actuator. The head support arm is very light, but also stiff; in modern drives, acceleration at the head reaches 550 g . The actuator is a permanent magnet and moving coil motor that swings

6741-447: The downloaded content at the time they desire, immediately and without any buffering issues. Push VOD depends on the viewer recording content so choices can be limited. Advertising video on demand (AVOD) uses an advertising-based revenue model. This allows companies that advertise on broadcast and cable channels to reach people who watch shows using VOD. This model also allows people to watch content without paying subscription fees. Hulu

6848-467: The earlier IBM disk drives used only two read/write heads per arm, the 1301 used an array of 48 heads (comb), each array moving horizontally as a single unit, one head per surface used. Cylinder-mode read/write operations were supported, and the heads flew about 250 micro-inches (about 6 μm) above the platter surface. Motion of the head array depended upon a binary adder system of hydraulic actuators which assured repeatable positioning. The 1301 cabinet

6955-507: The economic viability of the VOD model include VOD movie buy-rates and setting Hollywood and cable operator revenue splits. Cable providers offered VOD as part of digital subscription packages, which by 2005 primarily allowed cable subscribers to only access an on-demand version of the content that was already provided in the linear traditional broadcasting distribution. These on-demand packages sometimes include extras and bonus footage in addition to

7062-476: The growing amount of marketing that is need to gain the attention of an audience, pinning down an exact budget for a film production can be difficult. Video on demand can have three release strategies that include: day-and-date (instantaneous release in theaters and on VOD), day-before-date (VOD before theatrical viewing), and VOD only. Production studios can make revenue on these types of releases until sales start to slow. After that, film companies can then license

7169-443: The growth of areal density slowed. The rate of advancement for areal density slowed to 10% per year during 2010–2016, and there was difficulty in migrating from perpendicular recording to newer technologies. As bit cell size decreases, more data can be put onto a single drive platter. In 2013, a production desktop 3 TB HDD (with four platters) would have had an areal density of about 500 Gbit/in which would have amounted to

7276-416: The heads to the desired position. A metal plate supports a squat neodymium–iron–boron (NIB) high-flux magnet . Beneath this plate is the moving coil, often referred to as the voice coil by analogy to the coil in loudspeakers , which is attached to the actuator hub, and beneath that is a second NIB magnet, mounted on the bottom plate of the motor (some drives have only one magnet). The voice coil itself

7383-562: The home, subsequently increased to 25 Mbit/s. The content was provided by the BBC and Anglia Television . Although a technical success, difficulty in sourcing content was a major issue and the project closed in 1996. In 1997, Enron Corporation had entered the broadband market, constructing and purchasing thousands of miles of fiber-optic cables throughout the United States. In 2001, Enron and Blockbuster Inc. attempted to create

7490-504: The large downstream bandwidth present on their cable systems to deliver movies and television shows to end-users. These viewers can typically pause, fast-forward, and rewind VOD movies due to the low latency and random-access nature of cable technology. The large distribution of a single signal makes streaming VOD impractical for most satellite television systems. Both EchoStar / Dish Network and DirecTV offer VOD programming to PVR -owning subscribers of their satellite TV service. In Demand

7597-427: The largest hard drive had a capacity of 15 TB, while the largest capacity SSD had a capacity of 100 TB. As of 2018 , HDDs were forecast to reach 100 TB capacities around 2025, but as of 2019 , the expected pace of improvement was pared back to 50 TB by 2026. Smaller form factors, 1.8-inches and below, were discontinued around 2010. The cost of solid-state storage (NAND), represented by Moore's law ,

7704-711: The latter two sources are declining due to streaming services offering much more lucrative performance contracts to performers, and several ring sports organisations (mainly UFC and WWE ) now prefer direct marketing of their product via streaming services such as ESPN+ , the WWE Network , and the apps of Fox Sports over pay-TV providers which require a portion of the profits they otherwise retain directly. In Australia, pay-TV broadcaster Foxtel offers NVOD for new-release movies over their satellite service. Edge Spectrum, an American holder of low-power broadcasting licenses, has an eventual business plan to use its network and

7811-444: The magnetization of the material passing immediately under it. In modern drives, there is one head for each magnetic platter surface on the spindle, mounted on a common arm. An actuator arm (or access arm) moves the heads on an arc (roughly radially) across the platters as they spin, allowing each head to access almost the entire surface of the platter as it spins. The arm is moved using a voice coil actuator or, in some older designs,

7918-422: The manufacturing of the read/write heads to increase the strength of the magnetic field created by the heads. In 2004, a higher-density recording media was introduced, consisting of coupled soft and hard magnetic layers. So-called exchange spring media magnetic storage technology, also known as exchange coupled composite media , allows good writability due to the write-assist nature of the soft layer. However,

8025-736: The most common in the form of over-the-air television, VOD systems initially required each user to have an Internet connection with considerable bandwidth to access each system's content. In 2000, the Fraunhofer Institute IIS developed the JPEG2000 codec, which enabled the distribution of movies via Digital Cinema Packages. This technology has since expanded its services from feature-film productions to include broadcast television programmes and has led to lower bandwidth requirements for VOD applications. Disney , Paramount , Sony , Universal and Warner Bros. subsequently launched

8132-420: The most commonly used operating systems report capacities in powers of 1024, which results in a smaller number than advertised. Performance is specified as the time required to move the heads to a track or cylinder (average access time), the time it takes for the desired sector to move under the head (average latency , which is a function of the physical rotational speed in revolutions per minute ), and finally,

8239-890: The network, and 3DO as the set-top box with video streams and other information to be deployed to 2,500 homes. In 1994–95, US West filed for a patent concerning the provision of VOD in several cities: 330,000 subscribers in Denver, 290,000 in Minneapolis, and 140,000 in Portland. In early 1994, British Telecommunications (BT) introduced a trial VOD service in the United Kingdom. It used the DCT-based MPEG-1 and MPEG-2 video compression standards, along with ADSL technology. Many VOD trials were held with various combinations of server, network, and set-top box. Of these

8346-559: The norm in most computer installations and reached capacities of 300 megabytes by the early 1980s. Non-removable HDDs were called "fixed disk" drives. In 1963, IBM introduced the 1302, with twice the track capacity and twice as many tracks per cylinder as the 1301. The 1302 had one (for Model 1) or two (for Model 2) modules, each containing a separate comb for the first 250 tracks and the last 250 tracks. Some high-performance HDDs were manufactured with one head per track, e.g. , Burroughs B-475 in 1964, IBM 2305 in 1970, so that no time

8453-534: The platters, increasing areal density. Normally hard drive recording heads have a pole called a main pole that is used for writing to the platters, and adjacent to this pole is an air gap and a shield. The write coil of the head surrounds the pole. The STO device is placed in the air gap between the pole and the shield to increase the strength of the magnetic field created by the pole; FC-MAMR technically doesn't use microwaves, but uses technology employed in MAMR. The STO has

8560-519: The primary players in the US were the telephone companies using DEC, Microsoft, Oracle, IBM, Hewlett-Packard, USA Video, nCube, SGI, and other servers. The DEC server system was the most-used in these trials. The DEC VOD server architecture used interactive gateways to set up video streams and other information for delivery from any of a large number of VAX servers, enabling it in 1993 to support more than 100,000 streams with full videocassette recorder (VCR)-like functionality. In 1994, it upgraded to

8667-586: The production companies. Behavior detrimental to SVOD revenue Online piracy is detrimental to production companies that produce digital content. In a study that offered BitTorrent users a free SVOD subscription, the results of the research provided readers with information that show download and upload speeds in those homes decreased with a free subscription, but it could not prove decreased use in BitTorrent software. Hard disk A hard disk drive ( HDD ), hard disk , hard drive , or fixed disk

8774-507: The regular content. Peer-to-peer (P2P) file-sharing software allows the distribution of content without the linear costs associated with centralised streaming media . This innovation proved it is technically possible to offer the consumer potentially every film ever made, and the popularity and ease of use of such services may have motivated the rise of centralised video-on-demand services. Some services such as Spotify use peer-to-peer distribution to better scale their platforms. Netflix

8881-416: The revenue of hard disk drives as of 2017 . Though SSDs have four to nine times higher cost per bit, they are replacing HDDs in applications where speed, power consumption, small size, high capacity and durability are important. As of 2019 , the cost per bit of SSDs is falling, and the price premium over HDDs has narrowed. The primary characteristics of an HDD are its capacity and performance . Capacity

8988-489: The same platforms as traditional TVOD, but at a higher price point, typically about US$ 20 for a 48-hour rental; this offering has again been branded as "Home Premiere" by some studios and platforms. Disney used the September 2020 release of the live-action remake of Mulan to launch a related model called Premier Access ; this requires customers to pay a premium fee (approximately US$ 26–30 depending on country) on top of

9095-427: The speed at which the data is transmitted (data rate). The two most common form factors for modern HDDs are 3.5-inch, for desktop computers, and 2.5-inch, primarily for laptops. HDDs are connected to systems by standard interface cables such as SATA (Serial ATA), USB , SAS ( Serial Attached SCSI ), or PATA (Parallel ATA) cables. The first production IBM hard disk drive, the 350 disk storage , shipped in 1957 as

9202-438: The stack of disk platters when the drive was powered down. Instead, the heads were allowed to "land" on a special area of the disk surface upon spin-down, "taking off" again when the disk was later powered on. This greatly reduced the cost of the head actuator mechanism, but precluded removing just the disks from the drive as was done with the disk packs of the day. Instead, the first models of "Winchester technology" drives featured

9309-450: The swing arm actuator design to make possible the compact form factors of modern HDDs. As the 1980s began, HDDs were a rare and very expensive additional feature in PCs, but by the late 1980s, their cost had been reduced to the point where they were standard on all but the cheapest computers. Most HDDs in the early 1980s were sold to PC end users as an external, add-on subsystem. The subsystem

9416-439: The table above. Applications expanded through the 2000s, from the mainframe computers of the late 1950s to most mass storage applications including computers and consumer applications such as storage of entertainment content. In the 2000s and 2010s, NAND began supplanting HDDs in applications requiring portability or high performance. NAND performance is improving faster than HDDs, and applications for HDDs are eroding. In 2018,

9523-400: The thermal stability is determined only by the hardest layer and not influenced by the soft layer. Flux control MAMR (FC-MAMR) allows a hard drive to have increased recording capacity without the need for new hard disk drive platter materials. MAMR hard drives have a microwave generating spin torque generator (STO) on the read/write heads which allows physically smaller bits to be recorded to

9630-516: The time of launch the platform had over 4000 movies, allowed live streaming of over 40 television channels and catch-up TV in four languages. Content available apart from TV and movies are news, comedy clips, originals and music. As of February 2020, it had more than 410 shows and more than 4100 movies. There are three subscription plans offered for its users on monthly, quarterly and annual basis. Video on demand#Subscription models Television VOD systems can stream content, either through

9737-475: The top and bottom of the coil produce radial forces that do not rotate the head. The HDD's electronics controls the movement of the actuator and the rotation of the disk and transfers data to/from a disk controller . Feedback of the drive electronics is accomplished by means of special segments of the disk dedicated to servo feedback. These are either complete concentric circles (in the case of dedicated servo technology) or segments interspersed with real data (in

9844-491: The total number of errors in the entire HDD fixed by ECC (although not on all hard drives as the related S.M.A.R.T attributes "Hardware ECC Recovered" and "Soft ECC Correction" are not consistently supported), and the total number of performed sector remappings, as the occurrence of many such errors may predict an HDD failure . The "No-ID Format", developed by IBM in the mid-1990s, contains information about which sectors are bad and where remapped sectors have been located. Only

9951-442: The user with features of portable media players and DVD players. Some VOD systems store and stream programs from hard disk drives and use a memory buffer to allow the user to fast-forward and rewind videos. It is possible to put video servers on local area networks ; these can provide rapid responses to users. Cable companies have rolled out their own versions of VOD services through apps, allowing television access wherever there

10058-433: The usual filtered air. Since turbulence and friction are reduced, higher areal densities can be achieved due to using a smaller track width, and the energy dissipated due to friction is lower as well, resulting in a lower power draw. Furthermore, more platters can be fit into the same enclosure space, although helium gas is notoriously difficult to prevent escaping. Thus, helium drives are completely sealed and do not have

10165-499: The volume of storage produced ( exabytes per year) for servers. Though production is growing slowly (by exabytes shipped ), sales revenues and unit shipments are declining, because solid-state drives (SSDs) have higher data-transfer rates, higher areal storage density, somewhat better reliability, and much lower latency and access times. The revenues for SSDs, most of which use NAND flash memory , slightly exceeded those for HDDs in 2018. Flash storage products had more than twice

10272-460: The way for the seven Baby Bells— Ameritech , Bell Atlantic , BellSouth , NYNEX , Pacific Telesis , Southwestern Bell , and US West —to implement VOD systems. These companies and others began holding trials to set up systems for supplying video on demand over telephone and cable lines. In November 1992, Bell Atlantic announced a VOD trial. IBM was developing a video server code-named Tiger Shark. Concurrently, Digital Equipment Corporation (DEC)

10379-487: Was a major AVOD company before ending its free service in August 2016, transferring it to Yahoo! View using the existing Hulu infrastructure. Crackle has introduced a series of advertisements for the same company that ties into the content that is being watched. Ad-Supported Video on Demand (ASVOD) refers to video services that provide free content supported by advertisements. Popular services include Pluto TV , Xumo ,

10486-520: Was about the size of three large refrigerators placed side by side, storing the equivalent of about 21 million eight-bit bytes per module. Access time was about a quarter of a second. Also in 1962, IBM introduced the model 1311 disk drive, which was about the size of a washing machine and stored two million characters on a removable disk pack . Users could buy additional packs and interchange them as needed, much like reels of magnetic tape . Later models of removable pack drives, from IBM and others, became

10593-608: Was developing a scalable video server configured from small-to-large for a range of video streams. Bell Atlantic selected IBM and in April 1993 the system became the first VOD over ADSL to be deployed outside the lab, serving 50 video streams. In June 1993, US West filed for a patent to register a proprietary system consisting of the Digital Equipment Corporation Interactive Information Server, Scientific Atlanta providing

10700-469: Was launched on 16 November 2006 and the BBC's iPlayer , which was launched on 25 December 2007. Another example of online video publishers using legal peer-to-peer technology is based on Giraffic technology, which was launched in early 2011, with large online VOD publishers such as US-based VEOH and UK-based Craze's Online Movies Box movie rental service. Unlike broadcast television, which traditionally has been

10807-427: Was lost physically moving the heads to a track and the only latency was the time for the desired block of data to rotate into position under the head. Known as fixed-head or head-per-track disk drives, they were very expensive and are no longer in production. In 1973, IBM introduced a new type of HDD code-named " Winchester ". Its primary distinguishing feature was that the disk heads were not withdrawn completely from

10914-513: Was not sold under the drive manufacturer's name but under the subsystem manufacturer's name such as Corvus Systems and Tallgrass Technologies , or under the PC system manufacturer's name such as the Apple ProFile . The IBM PC/XT in 1983 included an internal 10 MB HDD, and soon thereafter, internal HDDs proliferated on personal computers. External HDDs remained popular for much longer on

11021-442: Was reported to be considering switching to a P2P model to cope with net neutrality problems from downstream providers. Transactional video on demand (TVOD) is a distribution method by which customers pay for each piece of video-on-demand content. For example, a customer would pay a fee for each movie or TV show that they watch. TVOD has two sub-categories: electronic sell-through (EST), by which customers can permanently access

11128-537: Was restricted to London. After attracting 40,000 customers, they were bought by Tiscali in 2006 which was, in turn, bought by Talk Talk in 2009. Cable TV providers Telewest and NTL (now Virgin Media) launched their VOD services in the United Kingdom in 2005, competing with the leading traditional pay-TV distributor BSkyB , which responded by launching Sky by broadband , later renamed Sky Anytime on PC . The service went live on 2 January 2006. Sky Anytime on PC uses

11235-449: Was shut down due to a lack of funding. VOD services are now available in all parts of the United States, which has the highest global take-up rate of VOD. In 2010, 80% of American Internet users had watched video online, and 42% of mobile users who downloaded video preferred apps to a normal browser. Streaming VOD systems are available on desktop and mobile platforms from cable providers (in tandem with cable modem technology). They use

11342-408: Was the norm. As of November 2019 , the platters in most consumer-grade HDDs spin at 5,400 or 7,200 rpm. Information is written to and read from a platter as it rotates past devices called read-and-write heads that are positioned to operate very close to the magnetic surface, with their flying height often in the range of tens of nanometers. The read-and-write head is used to detect and modify

11449-448: Was watched, when it was watched, what they watched after watching, and even how many people watched the same video at the same time in a day, month, and even year. Economics of SVOD Attendance in movie theaters had declined during the 2020 COVID-19 pandemic. Worldwide in 2019, theatrical entertainment reach 11.4 billion dollars, but in 2020, it was only 2.2 billion. Due recovery efforts to increase those attendance numbers, along with

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