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VHS

technology Maturity 7-9 Next article →

The Video Home System, commonly known as VHS, is a discontinued analog video recording standard. It uses magnetic tape housed in a plastic cassette to store video and audio information.

VHS recorder, camera and cassette b
VHS recorder, camera and cassette b

This technology became the dominant format for home video throughout the 1980s and 1990s. It transformed how people consumed media by allowing films to be watched in a domestic setting. Before the rise of VHS, video recording was largely a professional tool. The system's success relied on a combination of technical capacity and a widespread manufacturing network.

At the heart of the system is a 12.7 mm wide magnetic tape. This tape is made of Mylar and is coated with metal oxide particles.

VHS cassette tape 12
VHS cassette tape 12

The tape is wound between two spools inside a plastic shell. This shell is 187 mm wide, 103 mm deep, and 25 mm thick. To ensure high quality, the tapes are manufactured in cleanrooms. This prevents dust from becoming embedded in the tape, which could cause signal dropouts during playback.

The cassette also includes an anti-despooling mechanism to keep the tape organized between the spools.

Operating a VHS player involves a precise mechanical process. When a cassette is inserted, the VCR uses a light source to monitor the tape's position.

VHS diagram
VHS diagram

Early machines used an incandescent bulb, while later models used an infrared LED for a longer life. This light shines through a hole in the center of the cassette. Two photodiodes on either side detect when the clear tape leader reaches them. Once the light passes through the clear leader to the photodiode, the machine triggers an optical auto-stop. This prevents the mechanism from attempting to play a tape that has already reached its end.

VHS vs Betamax size
VHS vs Betamax size

The development of VHS was driven by a desire to make video recording affordable for homes. In 1971, JVC engineers Yuma Shiraishi and Shizuo Takano formed a team to create a consumer-grade system. They established a "VHS Development Matrix" with twelve specific objectives. These goals included compatibility with ordinary televisions and a recording capacity of at least two hours. They also wanted the system to be versatile, allowing for connections to video cameras. Even when JVC faced budget cuts in 1972, the engineers continued their work in secret. They successfully produced a functional prototype by 1973.

VHS is perhaps most famous for winning the "format war" against Sony's Betamax.

VHS vs Betamax size
VHS vs Betamax size

While Betamax offered smaller cassettes and potentially higher video quality, it had a major limitation. Early Betamax machines could only record one hour of programming. In contrast, the first VHS machines could record for two hours. This was possible because VHS used a longer tape and a slightly slower tape speed of 1.31 inches per second. Although Sony later developed faster tape speeds to increase recording time, VHS had already gained a massive lead. By 1980, VHS held 60% of the North American market.

Strategic partnerships played a massive role in this victory. JVC chose to use an open standard, meaning they shared the technology with other companies. This was different from Sony's approach with Betamax. JVC convinced major manufacturers like Matsushita to support the VHS format. Matsushita, which marketed products as National or Panasonic, feared a Sony monopoly.

JVC-HR-3300U
JVC-HR-3300U

Matsushita also viewed the one-hour limit of Betamax as a significant disadvantage. This collaboration provided the scale necessary to dominate the global market.

The era of magnetic tape eventually gave way to digital technology. In the late 1990s, the optical disc format known as DVD began to emerge.

Funai VHS Video recorder 2000s 1
Funai VHS Video recorder 2000s 1

DVDs provided a different way to distribute movies and eventually surpassed VHS rentals in the United States by 2003. For home recording, digital video recorders (DVRs) replaced VCRs during the 2000s. While the production of all VHS equipment officially ceased by 2016, the format remains a point of interest for collectors. It stands as a significant milestone in the history of consumer electronics and home entertainment.

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🖼️ Images & Media (22)
File:VHS logo.svg
VHS logo.svg
File:VHS recorder, camera and cassette b.jpg
VHS recorder, camera and cassette b.jpg
File:JVC-HR-3300U.jpg
JVC-HR-3300U.jpg
File:VHS cassette tape 12.JPG
VHS cassette tape 12.JPG
File:2023 Kaseta VHS, magnetofonowa i minikaseta.jpg
2023 Kaseta VHS, magnetofonowa i minikaseta.jpg
File:VHS diagram.svg
VHS diagram.svg
File:Funai VHS Video recorder 2000s 1.jpg
Funai VHS Video recorder 2000s 1.jpg
File:VCR load.jpg
VCR load.jpg
File:VHS tape with time scale.jpg
VHS tape with time scale.jpg
Medion MD8910 - Inject and eject of a VHS...
File:VHS-diagonal-helical-recording.jpg
VHS-diagonal-helical-recording.jpg
File:3-equals-1-waveform-cutting-vhs-decode-2024.png
3-equals-1-waveform-cutting-vhs-decode-2024.png

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