LaserDisc

• 1. Origins And Development History

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  The year 1963 marked the beginning of a journey that would eventually create the first commercial optical disc storage medium. David Paul Gregg and James Russell developed a transparent disc-based system during this period, later securing patents in 1970. MCA acquired the rights to this technology in 1968, setting the stage for future collaboration. By 1969, Philips had independently developed a videodisc using reflective technology, which offered distinct advantages over the transparent method used by Gregg and Russell. MCA and Philips began collaborating in the early 1970s and publicly demonstrated the videodisc format in 1972. The format was commercially introduced as MCA DiscoVision on the 11th of December 1978, in a test market launch in Atlanta, Georgia. This launch occurred two years after the debut of VHS and four years before the introduction of the CD. The first LaserDisc title released in North America was the MCA DiscoVision edition of Jaws on the 15th of December 1978. Philips produced the players while MCA manufactured the discs, but their partnership ultimately proved unsuccessful and dissolved after several years. In 1980, Pioneer acquired a majority stake in the format and began marketing it under new names. Some releases informally referred to it as LaserDisc, though the official name remained LaserVision until the early 1990s. Pioneer's LaserDisc players debuted in Japan in October 1981. By 1984, Philips and Sony had introduced LV-ROM, a version designed to store digital data with a capacity of 3.28 GB. Although LaserDisc never achieved mass-market success globally, it gained modest popularity in select markets like Japan and Hong Kong.

• 2. Technical Architecture And Variants

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  A standard LaserDisc used for home video measured 30 centimeters in diameter, roughly the same size as a 12-inch phonograph record. Each disc consisted of two single-sided aluminum platters bonded together with plastic. At a basic level, LaserDiscs stored analog video using a composite signal format, offering picture quality comparable to the Type C videotape format with approximately 425 to 440 horizontal lines of resolution. A carrier frequency was modulated by the video signal, and this signal was physically represented by the pattern of pits and lands on the disc. During playback, a laser read these patterns, enabling the player's circuitry to reconstruct the original analog signal. Because digital compression techniques were not yet available or practical in the late 1970s, three different playback formats were developed based on the disc's rotation speed. Constant angular velocity (CAV) discs were played at a constant rotational speed of 1,800 rpm for NTSC or Hi-Vision and 1,500 rpm for PAL. This allowed one video frame to be read per revolution, storing up to 54,000 individual frames on a single side. Constant linear velocity (CLV) discs gradually slowed their rotational speed during playback to increase storage capacity, ranging from 1,800 to 600 rpm for NTSC. This allowed up to 60 minutes of video per side for NTSC and Hi-Vision formats. Constant angular acceleration (CAA) was introduced in the early 1980s to address crosstalk distortion and tracking issues found in CLV discs. Unlike CLV, which slows the disc gradually, CAA changes the rotation speed in controlled steps, improving playback while remaining compatible with existing players.

• 3. Hardware Evolution And Player Models

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  The earliest LaserDisc players employed gas helium, neon laser tubes to read discs, emitting red-orange light with a wavelength of 632.8 nm. Later solid-state players used infrared semiconductor laser diodes with 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 rather than the top. One year earlier, Hitachi introduced an expensive industrial player with a laser diode, but the unit suffered from poor picture quality due to an inadequate dropout compensator. After Pioneer released the LD-700, gas lasers were no longer used in consumer players, although Philips continued to use them 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 were made that could play both sides automatically using a mechanism to physically flip a single laser pickup. The first mass-produced industrial LaserDisc player was the MCA DiscoVision PR-7820, later rebranded the Pioneer PR7820. 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. 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 like the Pioneer LD-600 or LD-1100. The Pioneer DVL-9, introduced in 1996, was both Pioneer's first consumer DVD player and the first combination DVD/LD player.

• 4. Market Penetration And Regional Adoption

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  LaserDisc did not achieve high market penetration in North America due to the high cost of the players and discs. While the format found a place in nearly one million American homes by the end of 1990, it remained obscure in Europe. In Japan, market penetration reached approximately 10% of households by 1999. In the United States, about 2% of households, roughly two million people, owned a player. The format was more popular in Japan than in North America because prices were kept low to ensure adoption. This resulted in minimal price differences between VHS tapes and the higher quality LaserDiscs. Anime collectors in every country quickly became familiar with this format and sought the higher video and sound quality available on LaserDisc. The format also became quite popular in Hong Kong during the 1990s before the introduction of VCDs and DVD. People rarely bought the discs because each LaserDisc was priced around US$100, but high rental activity helped the video rental business grow larger than ever previously. Due to integration with the Japanese export market, NTSC LaserDiscs were used in the Hong Kong market, creating a demand for multi-system TVs and multi-system VCRs. As of 2021, LaserDisc retains a small collector community in the United States and Japan.

• 5. Professional Applications And Industry Use

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  In the mid-1980s, Lucasfilm pioneered the EditDroid non-linear editing system for film and television based on computer-controlled LaserDisc players. Instead of printing dailies out on film, processed negatives from the day's shoot would be sent to a mastering plant to be assembled into 20-minute film segments. These were then mastered onto single-sided blank LaserDiscs, allowing for much easier selection and preparation of an edit decision list. Only 24 EditDroid systems were ever built, even though the ideas and technology are still in use today. In 1986, a SCSI-equipped LaserDisc player attached to a BBC Master computer was used for the BBC Domesday Project. The player was referred to as an LV-ROM (LaserVision Read Only Memory) as the discs contained the driving software as well as the video frames. The discs could contain in each CAV frame video/audio or video/binary data, but not both. Data frames appeared blank when played as video. It was typical for each disc to start with the disc catalog followed by the video introduction before the rest of the data. During the 1980s in the United States, Digital Equipment Corporation developed the standalone PC control IVIS for training and education. One of the most influential programs developed at DEC was Decision Point, a management gaming simulation that won the Nebraska Video Disc Award for Best of Show in 1985. Under contract from the U.S. military, Matrox produced a combination computer/LaserDisc player for instructional purposes. The computer was a 286, and the LaserDisc player only capable of reading the analog audio tracks.

• 6. Comparison With Competing Formats

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  LaserDisc featured a far sharper picture with a horizontal resolution of 425 television lines 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 was mostly analog only. The NTSC discs could store multiple audio tracks, allowing for extras such as director's commentary tracks and other features to be added onto a film. Initially, LaserDiscs were cheaper than videocassettes to manufacture because they lacked moving parts and plastic outer shells necessary for VHS tapes to work. A disc could be stamped out in a matter of seconds, whereas duplicating videotape required a complex bulk tape duplication mechanism. 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 costly glass-mastering process needed to make metal stamper mechanisms. Due to the larger volume of demand, videocassettes quickly became much cheaper to duplicate, costing as little as $1.00 by the beginning of the 1990s. LaserDisc players could provide a greater degree of control over the playback process compared to many DVD players.