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122-775: Like anime made for television broadcast, OVAs are divided into episodes. OVA media (tapes, laserdiscs or DVDs) usually contain just one episode each. Episode length varies from title to title: each episode may run from a few minutes to two hours or more. An episode length of 30 minutes is common, but no standard length exists. An OVA series can run anywhere from a single episode to dozens of episodes in length. Many anime series first appeared as OVAs, and later grow to become television series or movies. Producers sometimes make other OVA releases as sequels, side stories, music-video collections, or bonus episodes that continue existing as television series or films. Much OVA-production aims at an audience of male anime enthusiasts. Bandai Visual said in

244-679: A videodisc in reflective mode, which has advantages over the transparent mode. MCA and Philips then decided to combine their efforts and first publicly demonstrated the videodisc in 1972. LaserDisc was first available on the market in Atlanta, Georgia , on December 11, 1978, two years after the introduction of the VHS VCR , and four years before the introduction of the CD (which is based on laser disc technology). Initially licensed, sold, and marketed as MCA DiscoVision (also known as simply DiscoVision ) in 1978,

366-568: A 2004 news release (for their new OVAs aimed at women) that about 50% of the customers who had bought their anime DVDs in the past fell into the category of 25 to 40-year-old men, with only 13% of purchasers women, even with all ages included. (However, these statistics cover Bandai Visual anime DVDs in general.) Nikkei Business Publications also said in a news-release that mainly 25 to 40-year-old adults bought anime DVDs. Few OVAs target female audiences. Some OVAs based on television series (and especially those based on manga ) may provide closure to

488-584: A 4.7 in (12 cm) indentation in the loading tray, where the CD was placed for playback. At least two Pioneer models (the CLD-M301 and the CLD-M90) also operated as a CD changer, with several 4.7 in indentations around the circumference of the main tray. The Pioneer DVL-9, introduced in 1996, was both Pioneer's first consumer DVD player and the first combination DVD/LD player. The first high-definition video player

610-671: A DTS decoder. Many 1990s A/V receivers combined the AC-3 decoder and DTS decoder logic, but an integrated AC-3 demodulator was rare both in LaserDisc players and in later A/V receivers. PAL LaserDiscs have a slightly longer playing time than NTSC discs, but have fewer audio options. PAL discs only have two audio tracks, consisting of either two analog-only tracks on older PAL LaserDiscs, or two digital-only tracks on newer discs. In comparison, later NTSC LaserDiscs are capable of carrying four tracks (two analog and two digital). On certain releases, one of

732-663: A TV set with a VHS mechanism, were also once available for purchase. Combo units containing both a VHS mechanism and a DVD player were introduced in the late 1990s, and at least one combo unit, the Panasonic DMP-BD70V, included a Blu-ray player. VHS has been standardized in IEC 60774–1. The VHS cassette is a 187  mm wide, 103 mm deep, and 25 mm thick (7 3 ⁄ 8 × 4 1 ⁄ 16 × 1 inch) plastic shell held together with five Phillips-head screws . The flip-up cover, which allows players and recorders to access

854-557: A disadvantage. Matsushita's backing of JVC persuaded Hitachi , Mitsubishi , and Sharp to back the VHS standard as well. Sony's release of its Betamax unit to the Japanese market in 1975 placed further pressure on the MITI to side with the company. However, the collaboration of JVC and its partners was much stronger, which eventually led the MITI to drop its push for an industry standard. JVC released

976-586: A few, such as Battlestar Galactica and Jaws , were time-compressed versions of their CAV or CLV DiscoVision originals. The time-compressed CLV re-issue of Jaws no longer had the original soundtrack, having had incidental background music replaced for the videodisc version due to high licensing costs (the original music would not be available until the THX LaserDisc box set was released in 1995). One Universal/Columbia co-production issued by MCA Disco Vision in both CAV and CLV versions, The Electric Horseman ,

1098-427: A flying erase head for erasing individual video fields, and one was a dummy used for balancing the head drum. The high tape-to-head speed created by the rotating head results in a far higher bandwidth than could be practically achieved with a stationary head. VHS machines record up to 3  MHz of baseband video bandwidth and 300 kHz of baseband chroma bandwidth. The luminance (black and white) portion of

1220-586: A functional prototype of the Betamax format, and was very close to releasing a finished product. With this prototype, Sony persuaded the MITI to adopt Betamax as the standard, and allow it to license the technology to other companies. JVC believed that an open standard , with the format shared among competitors without licensing the technology, was better for the consumer. To prevent the MITI from adopting Betamax, JVC worked to convince other companies, in particular Matsushita (Japan's largest electronics manufacturer at

1342-500: A given disc very quickly. By comparison, VHS would require tedious rewinding and fast-forwarding to get to specific points. Initially , LaserDiscs were cheaper than videocassettes to manufacture, because they lacked the moving parts and plastic outer shell which were necessary for VHS tapes to work, and the duplication process was much simpler. A VHS cassette had at least 14 parts (including the actual tape) while LaserDisc had one part with five or six layers. A disc could be stamped out in

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1464-602: A handful of titles pressed by Technidisc that used CAA50. The final variant of CAA was CAA70, which could accommodate 70 minutes of playback time per side. There are no known uses of this format on the consumer market. Sound could be stored in either analog or digital format and in a variety of surround sound formats; NTSC discs could carry a stereo analog audio track, plus a stereo CD-quality uncompressed PCM digital audio track, which were ( EFM , CIRC , 16-bit and 44.1 kHz sample rate ). PAL discs could carry one pair of audio tracks, either analog or digital and

1586-498: A horizontal resolution of 425  television lines (TVL) for NTSC and 440 TVL for PAL discs, while VHS featured only 240 TVL with NTSC. Super VHS , released in 1987, reduced the quality gap, having horizontal luma resolution comparable to LaserDisc. But horizontal chroma resolution of Super VHS remained as low as that of standard VHS, about 40 TVL, while LaserDisc offered about 70 TVL of chroma resolution. LaserDisc could handle analog and digital audio where VHS

1708-425: A lifetime. By contrast, a VHS tape held all of its picture and sound information on the tape in a magnetic coating which was in contact with the spinning heads on the head drum, causing progressive wear with each use (though later in VHS's lifespan, engineering improvements allowed tapes to be made and played back without contact). The tape was also thin and delicate, and it was easy for a player mechanism, especially on

1830-438: A low quality or malfunctioning model, to mishandle the tape and damage it by creasing it, frilling (stretching) its edges, or even breaking it. By the advent of DVD , LaserDisc had declined considerably in popularity, so the two formats never directly competed with each other. LaserDisc was a composite video format: the luminance (black and white) and chrominance (color) information were transmitted in one signal, separated by

1952-476: A matter of seconds, whereas duplicating videotape required a complex bulk tape duplication mechanism and was a time-consuming process. By the end of the 1980s, average disc-pressing prices were over $ 5.00 per two-sided disc, due to the large amount of plastic material and the costly glass-mastering process needed to make the metal stamper mechanisms. Due to the larger volume of demand, videocassettes quickly became much cheaper to duplicate, costing as little as $ 1.00 by

2074-555: A maximum of about 430 m (1,410 ft) of tape at the lowest acceptable tape thickness, giving a maximum playing time of about four hours in a T-240/DF480 for NTSC and five hours in an E-300 for PAL at "standard play" (SP) quality. More frequently, however, VHS tapes are thicker than the required minimum to avoid complications such as jams or tears in the tape. Other speeds include "long play" (LP), "extended play" (EP) or "super long play" (SLP) (standard on NTSC; rarely found on PAL machines ). For NTSC, LP and EP/SLP double and triple

2196-445: A necessity. The earliest known attempt to release an OVA was The Green Cat in 1983, although it cannot count as the first OVA: there is no evidence that the VHS tape became available immediately and the series remained incomplete. The first OVA to be billed as such was 1983's Dallos , released by Bandai . Other companies were quick to pick up on the idea, and the mid-to-late 1980s saw

2318-449: A player equipped with a special "AC-3 RF" output and an external demodulator in addition to an AC-3 decoder . The demodulator was necessary to convert the 2.88  MHz modulated AC-3 information on the disc into a 384  kbit/s signal that the decoder could handle. In the mid to late 1990s, many higher-end AV receivers included the demodulator circuit specifically for the LaserDisc player's RF-modulated Dolby Digital AC-3 signal. By

2440-501: A projection of the FM signal along the track on the disc. When reading, the FM carrier can be reconstructed from the succession of pit edges, and demodulated to extract the original video signal (in practice, selection between pit and land parts uses intersection of the FM carrier with a horizontal line having an offset from the zero axis, for noise considerations). If PCM sound is present, its waveform, considered as an analog signal, can be added to

2562-486: A second VCR. The first version of Macrovision introduces high signal levels during the vertical blanking interval , which occurs between the video fields. These high levels confuse the automatic gain control circuit in most VHS VCRs, leading to varying brightness levels in an output video, but are ignored by the TV as they are out of the frame-display period. "Level II" Macrovision uses a process called "colorstriping", which inverts

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2684-608: A single laser pickup. Pioneer produced some multi-disc models which held more than 50 LaserDiscs. For a short time in 1984, one company offered a "LaserStack" unit that added multi-disc capability to existing players: the Pioneer LD-600, LD-1100, or the Sylvania/Magnavox clones. It required the user to physically remove the player lid for installation, where it then attached to the top of the player. LaserStack held up to 10 discs and could automatically load or remove them from

2806-521: A total of approximately 3.6 million LaserDisc players had been sold before its discontinuation in 2009. In 1984, Sony offered a LaserDisc format that could store any form of digital data , as a data storage device similar to CD-ROM , with a large 3.28 GB storage capacity, comparable to the DVD-ROM format that would arrive 11 years later in 1995. The first LaserDisc title marketed in North America

2928-492: A wavelength of 780 nm. In March 1984, Pioneer introduced the first consumer player with a solid-state laser, the LD-700. It was also the first LaserDisc player to load from the front and not the top. One year earlier, Hitachi introduced an expensive industrial player with a laser diode, but the player had poor picture quality (due to an inadequate dropout compensator), and was made only in limited quantities. After Pioneer released

3050-559: Is 3.335  cm / s (1.313 ips) for NTSC , 2.339 cm/s (0.921 ips) for PAL —or just over 2.0 and 1.4 metres (6 ft 6.7 in and 4 ft 7.2 in) per minute respectively. The tape length for a T-120 VHS cassette is 247.5 metres (812 ft). As with almost all cassette-based videotape systems, VHS machines pull the tape out of the cassette shell and wrap it around the inclined head drum, which rotates at 1,800 rpm in NTSC machines and at 1,500  rpm for PAL , one complete rotation of

3172-424: Is applied to over 550 million videocassettes annually and is used by every MPAA movie studio on some or all of their videocassette releases. Over 220 commercial duplication facilities around the world are equipped to supply Macrovision videocassette copy protection to rights owners...The study found that over 30% of VCR households admit to having unauthorized copies, and that the total annual revenue loss due to copying

3294-450: Is estimated at $ 370,000,000 annually. The system was first used in copyrighted movies beginning with the 1984 film The Cotton Club . Macrovision copy protection saw refinement throughout its years, but has always worked by essentially introducing deliberate errors into a protected VHS tape's output video stream. These errors in the output video stream are ignored by most televisions, but will interfere with re-recording of programming by

3416-419: Is extended/super long play ( 1 ⁄ 3 speed) which was primarily released into the NTSC market. As VHS was designed to facilitate recording from various sources, including television broadcasts or other VCR units, content producers quickly found that home users were able to use the devices to copy videos from one tape to another. Despite generation loss in quality when a tape was copied, this practice

3538-422: Is magnified by the narrower tracks. The heads for linear audio are not on the spinning drum, so for them, the tape speed from one reel to the other is the same as the speed of the heads across the tape. This speed is quite slow: for SP it is about 2/3s that of an audio cassette, and for EP it is slower than the slowest microcassette speed. This is widely considered inadequate for anything but basic voice playback, and

3660-490: Is recorded on the other side of this disc" are below the turtle. During the early years, MCA also manufactured discs for other companies including Paramount , Disney and Warner Bros. Some of them added their own names to the disc jacket to signify that the movie was not owned by MCA. After DiscoVision Associates shut down in early 1982, Universal Studio's videodisc software label (called MCA Videodisc until 1984), began reissuing many DiscoVision titles. Unfortunately, quite

3782-461: Is still not available in any other home video format with its original score intact; even the most recent DVD release has had substantial music replacement of both instrumental score and Willie Nelson's songs. An MCA release of Universal's Howard the Duck shows only the start credits shown in widescreen before changing to 4:3 for the rest of the film. For many years, this was the only disc-based release of

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3904-466: The MPEG-2 encoding process as video is prepared for DVD. Early DVD releases held the potential to surpass their LaserDisc counterparts, but often managed only to match them for image quality, and in some cases, the LaserDisc version was preferred. Proprietary human-assisted encoders manually operated by specialists could vastly reduce the incidence of artifacts, depending on playing time and image complexity. By

4026-465: The NTSC television standard were able to record one hour of programming at their standard tape speed of 1.5  inches per second  (ips). The first VHS machines could record for two hours, due to both a slightly slower tape speed (1.31 ips) and significantly longer tape. Betamax's smaller cassette limited the size of the reel of tape, and could not compete with VHS's two-hour capability by extending

4148-582: The Victor Company of Japan (JVC) . It was the dominant home video format throughout the tape media period in the late 1970s, 1980s, 1990s and early 2000s. Magnetic tape video recording was adopted by the television industry in the 1950s in the form of the first commercialized video tape recorders (VTRs), but the devices were expensive and used only in professional environments. In the 1970s, videotape technology became affordable for home use, and widespread adoption of videocassette recorders (VCRs) began;

4270-486: The composite domain (having a video bandwidth and resolution approximately equivalent to the 1-inch (25 mm) Type C videotape format ) with analog frequency modulation (FM) stereo sound and pulse-code modulation (PCM) digital audio . Later discs used D-2 instead of Type C videotape for mastering. The LaserDisc at its most fundamental level was still recorded as a series of pits and lands much like CDs, DVDs, and even Blu-ray discs are today. In true digital media,

4392-450: The omega transport system) in a helical fashion, assisted by the slanted tape guides. The head rotates constantly at 1798.2 rpm in NTSC machines, exactly 1500 in PAL, each complete rotation corresponding to one frame of video. Two tape heads are mounted on the cylindrical surface of the drum, 180 degrees apart from each other, so that the two heads "take turns" in recording. The rotation of

4514-528: The "official" name of the format remained LaserVision. In the early 1990s, the format's name was changed again to LaserDisc. Pioneer Electronics also entered the optical disc market in 1977 as a 50/50 joint venture with MCA called Universal-Pioneer and manufacturing MCA-designed industrial players under the MCA DiscoVision name (the PR-7800 and PR-7820). For the 1980 launch of the first Universal-Pioneer player,

4636-459: The "original" 20 dB CX system). This also relaxed calibration tolerances in players and helped reduce audible pumping if the CX decoder was not calibrated correctly. At least where the digital audio tracks were concerned, the sound quality was unsurpassed at the time compared to consumer videotape. However, the quality of the analog soundtracks could vary greatly depending upon the disc and, sometimes,

4758-653: The 1990s. It also saw a modest share of adoption in Australia and several European countries. By contrast, the format was much more popular in Japan and in the more affluent regions of Southeast Asia , such as Hong Kong, Singapore, and Malaysia, and was the prevalent rental video medium in Hong Kong during the 1990s. Its superior video and audio quality made it a popular choice among videophiles and film enthusiasts during its lifespan. The technologies and concepts behind LaserDisc were

4880-526: The 2000s. In 1956, after several attempts by other companies, the first commercially successful VTR, the Ampex VRX-1000 , was introduced by Ampex Corporation . At a price of US$ 50,000 in 1956 (equivalent to $ 560,343 in 2023) and US$ 300 (equivalent to $ 3,362 in 2023) for a 90-minute reel of tape, it was intended only for the professional market. Kenjiro Takayanagi , a television broadcasting pioneer then working for JVC as its vice president, saw

5002-521: The AC-3 signal to the standard Dolby Digital signal that was compatible with the standard Dolby Digital/PCM inputs on capable AV receivers. Another type marketed by Onkyo and Marantz converted the RF AC-3 signal to 6-channel analog audio. The two FM audio channels occupied the disc spectrum at 2.3 and 2.8 MHz on NTSC formatted discs and each channel had a 100 kHz FM deviation. The FM audio carrier frequencies were chosen to minimize their visibility in

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5124-534: The DVD release of the series. Laserdisc The LaserDisc ( LD ) is a home video format and the first commercial optical disc storage medium, initially licensed, sold and marketed as MCA DiscoVision (also known simply as "DiscoVision") in the United States in 1978. Its diameter typically spans 30 cm (12 in). Unlike most optical-disc standards, LaserDisc is not fully digital , and instead requires

5246-648: The FM carrier, which modulates the width of the intersection with the horizontal threshold. As a result, space between pit centers essentially represent video (as frequency), and pit length code for PCM sound information. Early LaserDiscs featured in 1978 were entirely analog but the format evolved to incorporate digital stereo sound in CD format (sometimes with a TOSlink or coax output to feed an external digital-to-analog converter or DAC), and later multi-channel formats such as Dolby Digital and DTS . Since digital encoding and compression schemes were either unavailable or impractical in 1978, three encoding formats based upon

5368-843: The HR-3300EK in the United Kingdom. The United States received its first VHS-based VCR, the RCA VBT200, on August 23, 1977. The RCA unit was designed by Matsushita and was the first VHS-based VCR manufactured by a company other than JVC. It was also capable of recording four hours in LP (long play) mode. The UK received its first VHS-based VCR, the Victor HR-3300EK, in 1978. Quasar and General Electric followed-up with VHS-based VCRs – all designed by Matsushita. By 1999, Matsushita alone produced just over half of all Japanese VCRs. TV/VCR combos , combining

5490-498: The LD-700 player bore the term "Pioneer LaserDisc brand videodisc player". From 1981 until the early 1990s, all properly licensed discs carried the LaserVision name and logo, even Pioneer Artists titles. On single-sided LaserDiscs mastered by Pioneer, playing the wrong side would cause a still screen to appear with a happy, upside-down turtle that has a LaserDisc for a belly (nicknamed the "LaserDisc Turtle"). The words "Program material

5612-428: The LD-700, gas lasers were no longer used in consumer players, despite their advantages, although Philips continued to use gas lasers in their industrial units until 1985. Most LaserDisc players required the user to manually turn the disc over to play the other side. A number of players (all diode laser based) were made that were capable of playing both sides of the disc automatically, using a mechanism to physically flip

5734-476: The North American retail marketplace, as media were no longer being produced. Players were still exported to North America from Japan until the end of 2001. As of 2021 , the format retains some popularity among "thousands" of American collectors, and to a greater degree in Japan, where the format was better supported and more prevalent during its lifespan. In Europe, LaserDisc always remained an obscure format. It

5856-472: The U-matic format. In 1971, JVC engineers Yuma Shiraishi and Shizuo Takano put together a team to develop a VTR for consumers. By the end of 1971, they created an internal diagram, "VHS Development Matrix", which established twelve objectives for JVC's new VTR: In early 1972, the commercial video recording industry in Japan took a financial hit. JVC cut its budgets and restructured its video division, shelving

5978-536: The VHS became the most popular media format for VCRs as it would win the "format war" against Betamax (backed by Sony ) and a number of other competing tape standards. The cassettes themselves use a 0.5-inch magnetic tape between two spools and typically offer a capacity of at least two hours. The popularity of VHS was intertwined with the rise of the video rental market, with films being released on pre-recorded videotapes for home viewing. Newer improved tape formats such as S-VHS were later developed, as well as

6100-483: The VHS project. However, despite the lack of funding, Takano and Shiraishi continued to work on the project in secret. By 1973, the two engineers had produced a functional prototype. In 1974, the Japanese Ministry of International Trade and Industry (MITI), desiring to avoid consumer confusion , attempted to force the Japanese video industry to standardize on just one home video recording format. Later, Sony had

6222-594: The VP-1000 was noted as a "laser disc player", although the "LaserDisc" logo was displayed clearly on the device. In 1981, "LaserDisc" was used exclusively for the medium itself, although the official name was "LaserVision" (as seen at the beginning of many LaserDisc releases, just before the start of the film). Pioneer reminded numerous video magazines and stores in 1984 that LaserDisc was a trademarked word, standing only for LaserVision products manufactured for sale by Pioneer Video or Pioneer Electronics. A 1984 Ray Charles ad for

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6344-632: The aforementioned Jaws . Philips' preferred name for the format was "VLP", after the Dutch words Video Langspeel-Plaat ("Video long-play disc"), which in English-speaking countries stood for Video Long-Play. The first consumer player, the Magnavox VH-8000 even had the VLP logo on the player. For a while in the early and mid-1970s, Philips also discussed a compatible audio-only format they called "ALP", but that

6466-413: The analog audio tracks were further made unavailable through replacement with supplementary audio such as isolated scores or audio commentary. This effectively reduced playback of a DTS disc on a non-DTS equipped system to mono audio, or in a handful of cases, no film soundtrack at all. Only one 5.1 surround sound option existed on a given LaserDisc (either Dolby Digital or DTS). As such, if surround sound

6588-454: The analog signal's colorburst period and causes off-color bands to appear in the picture. Level III protection added additional colorstriping techniques to further degrade the image. These protection methods worked well to defeat analog-to-analog copying by VCRs of the time. Consumer products capable of digital video recording are mandated by law to include features which detect Macrovision encoding of input analog streams, and disrupt copying of

6710-505: The analog tracks is used to carry a modulated AC-3 signal for 5.1 channel audio (for decoding and playback by newer LaserDisc players with an "AC-3 RF" output). Older NTSC LaserDiscs made before 1984 (such as the original DiscoVision discs) only have two analog audio tracks. The earliest players employed gas helium–neon laser tubes to read discs and had a red-orange light with a wavelength of 632.8  nm , while later solid-state players used infrared semiconductor laser diodes with

6832-454: The bandwidth to over 5 megahertz, yielding 420 analog horizontal (560 pixels left-to-right). Most Super VHS recorders can play back standard VHS tapes, but not vice versa. S-VHS was designed for higher resolution, but failed to gain popularity outside Japan because of the high costs of the machines and tapes. Because of the limited user base, Super VHS was never picked up to any significant degree by manufacturers of pre-recorded tapes, although it

6954-471: The beginning of the 1990s. LaserDiscs potentially had a much longer lifespan than videocassettes. Because the discs were read optically instead of magnetically, no physical contact needed to be made between the player and the disc, except for the player's clamp that holds the disc at its center as it is spun and read. As a result, playback would not wear the information-bearing part of the discs, and properly manufactured LaserDiscs could theoretically last beyond

7076-409: The cassette through the circular hole in the center of the underside, and two photodiodes are on the left and right sides of where the tape exits the cassette. When the clear tape reaches one of these, enough light will pass through the tape to the photodiode to trigger the stop function; some VCRs automatically rewind the tape when the trailing end is detected. Early VCRs used an incandescent bulb as

7198-509: The digital tracks on a PAL disc were 16-bit, 44.1 kHz as on a CD; in the UK, the term "LaserVision" is used to refer to discs with analog sound, while "LaserDisc" is used for those with digital audio. The digital sound signal in both formats is EFM -encoded, as in CD . Dolby Digital (also called AC-3) and DTS , which are now common on DVD releases, first became available on LaserDisc, and Star Wars: Episode I – The Phantom Menace (1999) which

7320-399: The drum moving across the tape at (a writing speed of) 4.86 or 6.096 meters per second. To maximize the use of the tape, the video tracks are recorded very close together. To reduce crosstalk between adjacent tracks on playback, an azimuth recording method is used: The gaps of the two heads are not aligned exactly with the track path. Instead, one head is angled at plus six degrees from

7442-520: The earliest optical disc format, LaserDisc ; the lack of global adoption of these formats increased VHS's lifetime, which eventually peaked and started to decline in the late 1990s after the introduction of DVD , a digital optical disc format. VHS rentals were surpassed by DVD in the United States in 2003, which eventually became the preferred low-end method of movie distribution. For home recording purposes, VHS and VCRs were surpassed by (typically hard disk –based) digital video recorders (DVR) in

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7564-456: The edge label. The tapes are made, pre-recorded, and inserted into the cassettes in cleanrooms , to ensure quality and to keep dust from getting embedded in the tape and interfering with recording (both of which could cause signal dropouts) There is a clear tape leader at both ends of the tape to provide an optical auto-stop for the VCR transport mechanism. In the VCR, a light source is inserted into

7686-406: The end of LaserDisc's run, DVDs were living up to their potential as a superior format. DVDs use compressed audio formats such as Dolby Digital and DTS for multichannel sound. Most LaserDiscs were encoded with stereo (often Dolby Surround) CD quality audio 16bit/44.1 kHz tracks as well as analog audio tracks. DTS-encoded LaserDiscs have DTS soundtracks of 1,235 kbit/s instead of

7808-416: The entirely digital DVD, LaserDiscs used only analog video. As the LaserDisc format was not digitally encoded and did not make use of compression techniques, it was immune to video macroblocking (most visible as blockiness during high motion sequences) or contrast banding (subtle visible lines in gradient areas, such as out-of-focus backgrounds, skies, or light casts from spotlights) which could be caused by

7930-460: The film, until widescreen DVD formats were released with extras. Also, the 1989 and 1996 LaserDisc releases of E.T. the Extra-Terrestrial are the only formats to include the cut scene of Harrison Ford , in the role of the school principal, telling off Elliott for letting the frogs free in the biology class. LaserDisc had several advantages over VHS . It featured a far sharper picture with

8052-415: The first VHS machines in Japan in late 1976, and in the United States in mid-1977. Sony's Betamax competed with VHS throughout the late 1970s and into the 1980s (see Videotape format war ). Betamax's major advantages were its smaller cassette size, theoretical higher video quality, and earlier availability, but its shorter recording time proved to be a major shortcoming. Originally, Beta I machines using

8174-419: The following steps, in this order: The erase head is fed by a high-level, high-frequency AC signal that overwrites any previous recording on the tape. Without this step, the new recording cannot be guaranteed to completely replace any old recording that might have been on the tape. The tape path then carries the tape around the spinning video-head drum, wrapping it around a little more than 180 degrees (called

8296-537: The format was introduced in Europe in 1983 with the LaserVision name, although Philips used "VLP" in model designations, such as VLP-600. Following lackluster sales there (around 12–15,000 units Europe-wide), Philips tried relaunching the entire format as "CD-Video" in 1987, with the name appearing not just on the new hybrid 12 cm discs , but also on standard 20 and 30 cm LaserDiscs with digital audio. While this name and logo appeared on players and labels for years,

8418-447: The foundation for later optical disc formats, including Compact Disc (CD), DVD , and Blu-ray (BD). LaserDisc players continued to be produced until July 2009, when Pioneer stopped making them. Optical video recording technology , using a transparent disc, was invented by David Paul Gregg and James Russell in 1963 (and patented in 1970 and 1990). The Gregg patents were purchased by MCA in 1968. By 1969, Philips had developed

8540-469: The frame number on the remote keypad, a feature not common among DVD players. Some DVD players have a cache feature, which stores a certain amount of the video in RAM, which allows the player to index a DVD as quickly as an LD, even down to the frame in some players. VHS The VHS ( Video Home System ) is a standard for consumer-level analog video recording on tape cassettes , introduced in 1976 by

8662-414: The head corresponding to one video frame. VHS uses an "M-loading" system, also known as M-lacing, where the tape is drawn out by two threading posts and wrapped around more than 180 degrees of the head drum (and also other tape transport components) in a shape roughly approximating the letter M . The heads in the rotating drum get their signal wirelessly using a rotary transformer . A VHS cassette holds

8784-555: The hyphen), which became the official spelling. Technical documents and brochures produced by MCA Disco-Vision during the early and mid-'70s also used the term "Disco-Vision Records" to refer to the pressed discs. MCA owned the rights to the largest catalog of films in the world during this time, and they manufactured and distributed the DiscoVision releases of those films under the "MCA DiscoVision" software and manufacturing label; consumer sale of those titles began on December 11, 1978, with

8906-612: The image. To help deal with this, Pioneer decided to implement the CX Noise Reduction System on the analog tracks. By reducing the dynamic range and peak levels of the audio signals stored on the disc, filtering requirements were relaxed and visible beats greatly reduced or eliminated. The CX system gives a total NR effect of 20 dB, but in the interest of better compatibility for non-decoded playback, Pioneer reduced this to only 14 dB of noise reduction (the RCA CED system used

9028-409: The inclined head drum, combined with the relatively slow movement of the tape, results in each head recording a track oriented at a diagonal with respect to the length of the tape, with the heads moving across the tape at speeds higher than what would otherwise be possible. This is referred to as helical scan recording. A tape speed of 1 + 5 ⁄ 16 inches per second corresponds to the heads on

9150-465: The late 1990s, with LaserDisc players and disc sales declining due to DVD's growing popularity, the AV receiver manufacturers removed the demodulator circuit. Although DVD players were capable of playing Dolby Digital tracks, the signals out of DVD players were not in a modulated form and were not compatible with the inputs designed for LaserDisc AC-3. Outboard demodulators were available for a period that converted

9272-446: The light source: when the bulb failed, the VCR would act as if a tape were present when the machine was empty, or would detect the blown bulb and completely stop functioning. Later designs use an infrared LED , which has a much longer life. The recording medium is a Mylar magnetic tape , 12.7 mm ( 1 ⁄ 2 inch) wide, coated with metal oxide , and wound on two spools . The tape speed for "Standard Play" mode (see below)

9394-497: The majority stockholder of JVC until 2011) to build a video recording standard for the Japanese consumer. The effort produced the U-matic format in 1971, which was the first cassette format to become a unified standard for different companies. It was preceded by the reel-to-reel 1 ⁄ 2 " EIAJ format. The U-matic format was successful in businesses and some broadcast television applications, such as electronic news-gathering, and

9516-436: The market flooded with OVAs. During this time, most OVA series were new, stand-alone titles. During Japan's economic bubble , production companies were more than willing to spontaneously decide to make a one- or two-part OVA in the 1980s. They paid money to anime studios, who then haphazardly created an OVA to be released to rental shops. Judging from sales, should a longer series be deemed feasible, TV networks paid for most of

9638-499: The medium as Laser Videodisc . Philips produced the players while MCA produced the discs. The Philips-MCA collaboration was unsuccessful – and was discontinued after a few years. Several of the scientists responsible for the early research (Richard Wilkinson, Ray Dakin and John Winslow) founded Optical Disc Corporation (now ODC Nimbus). LaserDisc was launched in Japan in October 1981, and

9760-414: The miniaturized drum required twice as many heads to complete any given task. This almost always meant four heads on the miniaturized drum with performance similar to a two head VCR with a full sized drum. No attempt was made to record Hi-Fi audio with such devices, as this would require an additional four heads to work. W-VHS decks could have up to 12 heads in the head drum, of which 11 were active including

9882-447: The need for his company to produce VTRs for the Japanese market at a more affordable price. In 1959, JVC developed a two-head video tape recorder and, by 1960, a color version for professional broadcasting. In 1964, JVC released the DV220, which would be the company's standard VTR until the mid-1970s. In 1969, JVC collaborated with Sony Corporation and Matsushita Electric (Matsushita was

10004-451: The pits (or their edges) directly represent 1s and 0s of a binary digital information stream. On a LaserDisc, the information is encoded as analog frequency modulation and is contained in the lengths and spacing of the pits. A carrier frequency is modulated by the baseband video signal (and analog soundtracks). In a simplified view, positive parts of this variable frequency signal can produce lands and negative parts can be pits, which results in

10126-597: The player or change sides in around 15 seconds. The first mass-produced industrial LaserDisc player was the MCA DiscoVision PR-7820, later rebranded the Pioneer PR7820 . In North America, this unit was used in many General Motors dealerships as a source of training videos and presentation of GM's new line of cars and trucks in the late 1970s and early 1980s. Most players made after the mid-1980s were capable of also playing Compact Discs . These players included

10248-416: The player to refuse commands to skip a specific part (such as fast forwarding through copyright warnings). (Some DVD players, particularly higher-end units, do have the ability to ignore the blocking code and play the video without restrictions, but this feature is not common in the usual consumer market.) With CAV LaserDiscs, the user could jump directly to any individual frame of a video simply by entering

10370-741: The player. Many early and lower-end LaserDisc players had poor analog audio components, and in turn, many early discs had poorly mastered analog audio tracks, making digital soundtracks in any form more desirable to serious enthusiasts. Early DiscoVision and LaserDisc titles lacked the digital audio option, but many of those movies received digital sound in later re-issues by Universal, and the quality of analog audio tracks generally improved greatly as time went on. Many discs that had originally carried old analog stereo tracks received new Dolby Stereo and Dolby Surround tracks instead often in addition to digital tracks, which helped boost sound quality. Later analog discs also applied CX noise reduction , which improved

10492-470: The playing time for an E-XXX tape in an NTSC machine, this formula is used: Since the recording/playback time for PAL/SECAM is roughly 1/3 longer than the recording/playback time for NTSC, some tape manufacturers label their cassettes with both T-XXX and E-XXX marks, like T60/E90, T90/E120 and T120/E180. SP is standard play, LP is long play ( 1 ⁄ 2 speed, equal to recording time in DVHS "HS" mode), EP/SLP

10614-419: The playing time for any given cassette will vary between the systems. To avoid confusion, manufacturers indicate the playing time in minutes that can be expected for the market the tape is sold in: E-XXX indicates playing time in minutes for PAL or SECAM. T-XXX indicates playing time in minutes for NTSC or PAL-M. To calculate the playing time for a T-XXX tape in a PAL machine, this formula is used: To calculate

10736-572: The plot – closure not present in the original series. OVAs originated during the early 1980s. As the VCR became a fixture in Japanese homes, the anime industry grew. Demand for anime became massive, so much so that consumers would go to video stores to buy new animation outright. While people in the United States used the phrase " direct-to-video " as a pejorative for works that could not make it onto television or movie screens, in Japan direct-to-video became

10858-552: The production costs of the entire series. As the Japanese economy worsened in the 1990s , the flood of new OVA titles diminished to a trickle. Production of OVAs continued, but in smaller numbers. Many anime TV series ran 13 episodes rather than the traditional 26-episodes per season. Studios often designed new titles to be released to TV if they approached these lengths. In addition, the rising popularity of cable and satellite TV networks (with their typically less strict censorship) allowed

10980-431: The public to see direct broadcasts of many new titles. Therefore, many violent and risque series became regular TV series, when previously those titles would have been OVAs. During this time, most OVA content was limited to that related to existing and established titles. In 2000 and later, a new OVA trend began. Producers released many TV series without normal broadcasts of all of the episodes—but releasing some episodes on

11102-526: The quality of the SP speed, and dramatically lowered the quality of freeze frame and high speed search. Later models implemented both wide and narrow heads, and could use all four during pause and shuttle modes to further improve quality although machines later combined both pairs into one. In machines supporting VHS HiFi (described later), yet another pair of heads was added to handle the VHS HiFi signal. Camcorders using

11224-566: The receiver. While good comb filters could separate the signals adequately, the two signals could not be completely separated. On DVD-Video , images are stored in the YCbCr format, with the chroma information being entirely discrete, which results in far higher fidelity, particularly at strong color borders or regions of high detail (especially if there is moderate movement in the picture) and low-contrast details such as skin tones, where comb filters almost inevitably smudge some detail. In contrast to

11346-612: The recording time accordingly, but these speed reductions cause a reduction in horizontal resolution – from the normal equivalent of 250 vertical lines in SP, to the equivalent of 230 in LP and even less in EP/SLP. Due to the nature of recording diagonally from a spinning drum, the actual write speed of the video heads does not get slower when the tape speed is reduced. Instead, the video tracks become narrower and are packed closer together. This results in noisier playback that can be more difficult to track correctly: The effect of subtle misalignment

11468-438: The reduced bitrate of 768 kbit/s commonly employed on DVDs with optional DTS audio. LaserDisc players could provide a greater degree of control over the playback process. Unlike many DVD players, the transport mechanism always obeyed commands from the user: pause, fast-forward, and fast-reverse commands were always accepted (barring malfunctions). There were no "User Prohibited Options" where content protection code instructed

11590-404: The remaining parts inventory was exhausted. It was estimated that in 1998, LaserDisc players were in approximately 2% of U.S. households (roughly two million). By comparison, in 1999, players were in 10% of Japanese households. A total of 16.8 million LaserDisc players were sold worldwide, of which 9.5 million were sold by Pioneer. By 2001, LaserDisc had been completely replaced by DVD in

11712-509: The respective analog TV standard (625 for PAL or 525 for NTSC ; somewhat fewer scan lines are actually visible due to overscan and the VBI ). In modern-day digital terminology, NTSC VHS resolution is roughly equivalent to 333×480 pixels for luma and 40×480 pixels for chroma. 333×480=159,840 pixels or 0.16 MP (1/6 of a megapixel). PAL VHS resolution is roughly 333×576 pixels for luma and 40×576 pixels for chroma (although when decoded PAL and SECAM half

11834-457: The rotation speed were used: As Pioneer introduced digital audio to LaserDisc in 1985, it further refined the CAA format. CAA55 was introduced in 1985 with a total playback capacity per side of 55 minutes 5 seconds, reducing the video capacity to resolve bandwidth issues with the inclusion of digital audio. Several titles released between 1985 and 1987 were analog audio only due to the length of

11956-449: The second tape head, is another 1 ⁄ 60 or 1 ⁄ 50 of a second TV picture field, and so on. Thus one complete head rotation records an entire NTSC or PAL frame of two fields. The original VHS specification had only two video heads. When the EP recording speed was introduced, the thickness of these heads was reduced to accommodate the narrower tracks. However, this subtly reduced

12078-411: The signal-to-noise ratio of the audio. DTS audio, when available on a disc, replaced the digital audio tracks; hearing DTS-encoded audio required only an S/PDIF compliant digital connection to a DTS decoder. On a DTS disc, digital PCM audio was not available, so if a DTS decoder was also not available, the only option was to fall back to the analog Dolby Surround or stereo audio tracks. In some cases,

12200-517: The tape length. Instead, Sony had to slow the tape down to 0.787 ips (Beta II) in order to achieve two hours of recording in the same cassette size. Sony eventually created a Beta III speed of 0.524 ips, which allowed NTSC Betamax to break the two-hour limit, but by then VHS had already won the format battle. Additionally, VHS had a "far less complex tape transport mechanism" than Betamax, and VHS machines were faster at rewinding and fast-forwarding than their Sony counterparts. VHS eventually won

12322-441: The tape, has a latch on the right side, with a push-in toggle to release it (bottom view image). The cassette has an anti-despooling mechanism, consisting of several plastic parts between the spools, near the front of the cassette (white and black in the top view). The spool latches are released by a push-in lever within a 6.35 mm ( 1 ⁄ 4 inch) hole at the bottom of the cassette, 19 mm ( 3 ⁄ 4 inch) in from

12444-459: The technology was previously referred to internally as Optical Videodisc System , Reflective Optical Videodisc , Laser Optical Videodisc , and Disco-Vision (with a hyphen), with the first players referring to the format as Video Long Play . Pioneer Electronics later purchased the majority stake in the format and marketed it as both LaserVision (format name) and LaserDisc (brand name) in 1980, with some releases unofficially referring to

12566-555: The time, marketing its products under the National brand in most territories and the Panasonic brand in North America, and JVC's majority stockholder), to accept VHS, and thereby work against Sony and the MITI. Matsushita agreed, primarily out of concern that Sony might become the leader in the field if its proprietary Betamax format was the only one allowed to be manufactured. Matsushita also regarded Betamax's one-hour recording time limit as

12688-586: The title and the desire to keep the film on one disc (e.g., Back to the Future ). By 1987, Pioneer had overcome the technical challenges and was able to once again encode in CAA60, allowing a total of 60 minutes 5 seconds. Pioneer further refined CAA, offering CAA45, encoding 45 minutes of material, but filling the entire playback surface of the side. Used on only a handful of titles, CAA65 offered 65 minutes 5 seconds of playback time per side. There were

12810-409: The track, and the other at minus six degrees. This results, during playback, in destructive interference of the signal from the tracks on either side of the one being played. Each of the diagonal-angled tracks is a complete TV picture field , lasting 1 ⁄ 60 of a second ( 1 ⁄ 50 on PAL) on the display. One tape head records an entire picture field. The adjacent track, recorded by

12932-410: The use of analog video signals. Although the format was capable of offering higher-quality video and audio than its consumer rivals, VHS and Betamax videotape, LaserDisc never managed to gain widespread use in North America. This was largely due to the high cost of the players and their inability to record TV programs. It eventually did gain some traction in that region and became mildly popular in

13054-444: The vertical color resolution). JVC countered 1985's SuperBeta with VHS HQ, or High Quality. The frequency modulation of the VHS luminance signal is limited to 3 megahertz, which makes higher resolutions technically impossible even with the highest-quality recording heads and tape materials, but an HQ branded deck includes luminance noise reduction, chroma noise reduction, white clip extension, and improved sharpness circuitry. The effect

13176-553: The video image, so that even with a poorly mastered disc, audio carrier beats in the video would be at least ‑35 dB down, and thus, invisible. Due to the frequencies chosen, the 2.8 MHz audio carrier (Right Channel) and the lower edge of the chroma signal were very close together, and if filters were not carefully set during mastering, there could be interference between the two. In addition, high audio levels combined with high chroma levels could cause mutual interference, leading to beats becoming visible in highly saturated areas of

13298-404: The video is frequency modulated and combined with a down-converted " color under " chroma (color) signal that is encoded using quadrature amplitude modulation . Including side bands , the signal on a VHS tape can use up to 10 MHz of RF bandwidth. VHS horizontal resolution is 240 TVL , or about 320 lines across a scan line. The vertical resolution (number of scan lines) is the same as

13420-411: The video. Both intentional and false-positive detection of Macrovision protection has frustrated archivists who wish to copy now-fragile VHS tapes to a digital format for preservation. As of the 2020s, modern software decoding ignores Macrovison as software is not limited to the fixed standards that Macrovision was intended to disrupt in hardware based systems. The recording process in VHS consists of

13542-718: The war, gaining 60% of the North American market by 1980. The first VCR to use VHS was the Victor HR-3300 , and was introduced by the president of JVC in Japan on September 9, 1976. JVC started selling the HR-3300 in Akihabara , Tokyo, Japan, on October 31, 1976. Region-specific versions of the JVC HR-3300 were also distributed later on, such as the HR-3300U in the United States, and

13664-509: Was a major liability for VHS-C camcorders that encouraged the use of the EP speed. Color depth deteriorates significantly at lower speeds in PAL: often, a color image on a PAL tape recorded at low speed is displayed only in monochrome, or with intermittent color, when playback is paused. VHS cassettes for NTSC and PAL/SECAM systems are physically identical, although the signals recorded on the tape are incompatible. The tape speeds are different too, so

13786-823: Was chosen by the British Broadcasting Corporation (BBC) for the BBC Domesday Project in the mid-1980s, a school-based project to commemorate the 900 years since the original Domesday Book in England. From 1991 until the late 1990s, the BBC also used LaserDisc technology (specifically Sony CRVdisc) to play out their channel idents . A standard home video LaserDisc is 12 in (30 cm) in diameter and made up of two single-sided aluminum discs layered in plastic. Although similar in appearance to compact discs or DVDs , early LaserDiscs used analog video stored in

13908-460: Was desired, the disc must be matched to the capabilities of the playback equipment (LaserDisc player and receiver/decoder) by the purchaser. A fully capable LaserDisc playback system included a newer LaserDisc player that was capable of playing digital tracks; had a digital optical output for digital PCM and DTS encoded audio; was aware of AC-3 audio tracks; and had an AC-3 coaxial output, an external or internal AC-3 RF demodulator and AC-3 decoder, and

14030-445: Was mostly analog only (VHS could have PCM audio in professional applications but it was uncommon), and the NTSC discs could store multiple audio tracks. This allowed for extras such as director's commentary tracks and other features to be added onto a film, creating "Special Edition" releases that would not have been possible with VHS. Disc access was random and chapter-based, like the DVD format, meaning that one could jump to any point on

14152-512: Was produced by all three companies until the late 1980s, but because of cost and limited recording time, very few of the machines were sold for home use. Therefore, soon after the U-Matic release, all three companies started working on new consumer-grade video recording formats of their own. Sony started working on Betamax , Matsushita started working on VX , and JVC released the CR-6060 in 1975, based on

14274-523: Was regarded as a widespread problem, which members of the Motion Picture Association of America (MPAA) claimed caused them great financial losses. In response, several companies developed technologies to protect copyrighted VHS tapes from casual duplication by home users. The most popular method was Analog Protection System , better known simply as Macrovision , produced by a company of the same name. According to Macrovision: The technology

14396-417: Was released on LaserDisc in Japan, was among the first home video releases ever to include 6.1 channel Dolby Digital EX Surround (along with a few other late-life releases from 1999 to 2001). Unlike DVDs, which carry Dolby Digital audio in digital form, LaserDiscs stored Dolby Digital in a frequency modulated form within a track normally used for analog audio. Extracting Dolby Digital from a LaserDisc required

14518-582: Was soon dropped as the Compact Disc system became a non-compatible project in the Philips corporation. Until early 1980, the format had no "official" name. The LaserVision Association, made up of MCA, Universal-Pioneer, IBM , and Philips/Magnavox, was formed to standardize the technical specifications of the format (which had been causing problems for the consumer market) and finally named the system officially as "LaserVision". After its introduction in Japan in 1981,

14640-755: Was the MCA DiscoVision release of Jaws on December 15, 1978. The last title released in North America was Paramount's Bringing Out the Dead on October 3, 2000. Film titles continued to be released in Japan until September 21, 2001, with the last Japanese movie released being the Hong Kong film Tokyo Raiders from Golden Harvest . The last known LD title is Onta Station vol. 1018, a karaoke disc released on March 21, 2007. Production of LaserDisc players ended in July 2009, when Pioneer stopped making them. Pioneer continued to repair and service players until September 30, 2020, when

14762-608: Was the Pioneer HLD-X0. A later model, the HLD-X9, featured a superior comb filter , and laser diodes on both sides of the disc. During its development, MCA (which co-owned the technology), referred to it as the Optical Videodisc System , "Reflective Optical Videodisc" or "Laser Optical Videodisc", depending on the document. They changed the name once in 1969 to Disco-Vision and then again in 1978 to DiscoVision (without

14884-528: Was to increase the apparent horizontal resolution of a VHS recording from 240 to 250 analog (equivalent to 333 pixels from left-to-right, in digital terminology). The major VHS OEMs resisted HQ due to cost concerns, eventually resulting in JVC reducing the requirements for the HQ brand to white clip extension plus one other improvement. In 1987, JVC introduced a new format called Super VHS (often known as S-VHS) which extended

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