S-VHS

Hifi on helical scan

0.5-3.5 hours ( NTSC).

Double Barrel length

In the LP mode

Super Video Home System (S -VHS) is an enhanced, backwards compatible VHS standard for home video. He has been introduced in 1987 by the company JVC.

Improving the image quality

S -VHS offers improved image resolution and greater color accuracy. The horizontal resolution is about two-thirds better than VHS. VHS offers based on a square image size of the full visible height of about 240 lines, S -VHS, however, are 400 Calculated on the entire image width which approximately 320 lines at VHS, and about 530 at S-VHS.

The higher horizontal resolution was made possible by a significantly higher carrier frequency of the frequency-modulated luminance signal. The video bandwidth is 4 MHz compared to VHS with only 3 MHz. Also the FM - stroke range was compared with VHS (only 1 MHz) increased to 1.6 MHz. These high frequencies can not be reliably recorded but simple VHS tapes. Therefore, typically special higher quality iron oxide-coated tapes with increased magnetic particle density can be used for S- VHS. The cassettes correspond in dimensions VHS tapes and can also be used as such, have as an identifier but an opening on the bottom, by which S -VHS recorder to recognize the cartridge and switch to S -VHS mode. Some newer devices also allow the use of ordinary VHS tapes to record in the S -VHS format ( JVC calls this function "S -VHS ET "). The quality will be dependent on the band used widely and is even worse than VHS at some tapes in circumstances in high-quality VHS tapes, however, an approximately comparable with real S -VHS cassette image quality is often possible.

Another important criterion for the better picture quality of S -VHS system over VHS is the separation of luminance and chrominance signal, not only in the recording ( as offered by VHS), but also on the signal paths to the terminals, ie in connection cables and connectors.

S -VHS can theoretically even offer a better picture than analog terrestrial broadcasted television. Especially amateur filmmakers came the better picture quality - achieved by separating the luminance (Y) and the color signal (C ) - very accommodating, because S -VHS editing copies allowed in acceptable quality.

The distribution of S-VHS

S -VHS recorder gained relatively little market share. In ordinary home use for recording TV shows was more than adequate for the majority of the population VHS, there was little need for a higher quality video system. Other reasons are likely the higher acquisition cost of recorders and recording media, and the lack of film - buying cassettes have been. In the early days of S-VHS, there were on top of that the problem is that there were few TV with S -Video input and thus the full quality of S-VHS could not be exploited. In a composite connection increase with in S -VHS much greater brightness bandwidth problems of crosstalk with the color signal.

Law was popular S- VHS in amateur and semi-professional filmmakers, as the system offered in comparison to VHS significantly better image quality even for the average consumer affordable prices. With high-quality S -VHS recorders and tape recordings were possible that little could be distinguished from a modern digital recording on an ordinary TV.

Even in the medical field S -VHS was fairly common, for example, for recording ultrasound images or endoscopic examinations.

In the professional area S -VHS led a shadowy existence. The inventor of the system, JVC, it marketed under the name Professional -S. This recorder could be integrated into editing suites and had partially interfaces for the connection of computers to control. Although the color noise is bearable even for a simple recording, comes (as with VHS) color noise reduction to use, resulting in tape copies to VHS typical color bleeding.

TV station with limited financial resources, especially in developing countries, even today using S -VHS or even VHS.

Today, S -VHS, as well as VHS is outdated, both formats have been largely supplanted in the home of DVD-Video. In the semi-professional DV and DVCAM, is often used instead of S - VHS.

Nonetheless, a compact variant called S -VHS-C S-VHS was also developed (see, VHS -C) and could be used in appropriate camcorders. To date, S -VHS and S- VHS-C cassettes commercially available.

S- VHS tapes serve the ADAT ( and similar units from other manufacturers) as a medium for digital 8-track recordings.

S-Video

The designation S -VHS is often used incorrectly for S-Video. However, S -VHS is a video tape recording method, while S - video describes the nature of the signaling pathway in cables and connectors and is an abbreviation for " Separated Video". For example, graphics cards have no S-VHS-Aus-/Eingang, properly marked, it is a S-Video-Aus-/Eingang. Today's most common form of connector for S- video is the so-called Hosidenstecker, which makes the separation of luminance ( black and white signal) and chroma ( color) signal possible. In contrast, the Composite-Ein-/Ausgang, which summarizes the two signals and therefore requires only a simple ( yellow ) RCA connectors.

End of the 80 - year S- Video connectors were introduced with the then-new S -VHS Hi8 camcorders and video cameras. With the proliferation of DVD players, AV receivers and digital camcorder, the term S- Video has then enforced for this type of connection more and more. Cable and connector ( Mini DIN ) have remained the same. Therefore, the term " S- VHS cable " is not necessarily wrong.

Swell

• Henry Pretty, Rolf Szapanski: Electrical Engineering Education Communication Electronics, Part 2: Radio and television technology. Westermann, Braunschweig, 1997, ISBN 3-14-221430-5, p 393
• Wilhelm Benz: table book radio and television engineering, radio electronics. 3rd edition. Kieser, Neusaess 1993, ISBN 3-88173-060-5.
• Jürgen Burghardt: Manual of the professional video recorder. Essen 1994, ISBN 3-930524-01-5.

• Videotape format