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VTR
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The first domestic VTR system in Japan was a 4-head
VTR using 2-inch tape reels, test manufactured in 1958. With the
aim of using it in the Rome and Tokyo Olympics, developments were
later made on a frame converter and a slow-motion VTR system.
In 1964, NHK obtained a basic patent for a 1.5-head helical-scan
VTR system. This system was later implemented on a 1-inch helical-scan
VTR.
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VCR tape: price and recording area per bit (square
micrometer)
2-inch (Ampex) 90 min. 1,000,000 yen 100μm2/bit
1-inch (Sony Type C) 60 min. 120,000 yen 10μm2/bit
1/2-inch (Matsushita D-3) 60 min. 20,000 yen 2μm2/bit
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2-inch VTR by STRL in 1958
A 4-head VTR using 2-inch magnetic tape, which was extremely expensive
at the time of introduction. |
1- inch VTR in 1978
The analog VTR helical-scan system using a 1-inch open reel tape
was named the Type C Format system. This 1-inch tape was smaller
and cheaper than 2-inch tape. It later became the basis for the
1-inch HDTV analog VTR and the 1-inch HDTV digital VTR. |
D-3 VCR in 1991
A 1/2-inch small cassette digital VCR was introduced in 1991.
It allows repeated taping without picture quality deterioration.
This technology was succeeded by an HDTV digital VCR, the HD-D5. |
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Copyright 2002 NHK (Japan Broadcasting Corporation)
All rights reserved.
Unauthorized copy of the pages is prohibited. |
