The VHS Format
VHS is a consumer-level video standard developed by JVC and launched in 1976. Originally VHS was an acronym for Vertical Helical Scan (a reference to the recording system used) but was later changed to the more consumer-friendly Video Home System.
Technical Specifications of the VHS Standard
|Tape Width:||12.70 mm (½ inch)|
|Tape speed:||3.335 cm/s for NTSC, 2.339 cm/s for PAL|
|Record Time:||Up to 6 hours (SP) using thin tape. Normal tape has a maximum of 3 hours.
Note: Many VCRs have a long-play (LP) mode which slows the tape speed to allow longer record time. This is not part of the official VHS standard.
|Video bandwidth:||Approx 3 MHz|
|Horizontal resolution:||Approx 240 lines|
|Vertical resolution:||486 lines for NTSC, 576 lines in PAL|
VHS was a popular format for early consumer video cameras. Initially these were two-piece units with a separate camera and connected recorder. In the 1980s the VHS-C format was introduced, reducing the size of cameras significantly and accelerating growth of the new camcorder (one-piece camera/recorder) market.
The camcorder format war did not go as well for VHS. When Sony introduced the Video8 format it was widely regarded as superior. Along with their ability to produce top-class camcorders, Sony had a powerful answer to VHS-C and gained the upper hand. Luckily for the VHS-C format, it was kept alive by the convenience of shooting in the same format used by the family VCR.
- VHS-C — the compact camcorder format.
- S-VHS (Super VHS) was introduced in 1987, providing increased resolution and overall quality.
- S-VHS-C is the S-VHS equivalent of VHS-C, i.e. the better tape format in the small cassettes.
- D-VHS is a digital format developed in response to the new HDTV environment.
In the early 21st Century both VHS and Video8 were made obsolete by new digital formats. In 2002 sales of DVD players exceeded sales of VHS players, and over the ensuing few years manufacturers began discontinuing production of VHS machines.