Explaining the use of the S-Video / S-VHS, 4pin din Plug
S-Video, Hi-8 or YC are the different terminologies for this type of signal.
The Super Video Signal was developed to give a higher quality picture image by separating the luminance (light) & chrominance (colour). So unlike the standard composite signal, whereby all the picture information is fed down one wire, with SVHS the two different elements are transmitted separately and individually screened. This prevents any possibility of the colour frequency spectrum overlapping, TV pictures are free from colour fringing and video copies suffer less loss in clarity.
This type of signal is generally available on most types of equipment. However, this signal can only be used when both pieces of equipment are SVHS compatible - otherwise when sending a SVHS signal from one device to another device that does not have SVHS facility - the ending result will be a black and white picture.
The S-Video signal can be carried via the 4pin din plug, which is picture only, or a specially wired or fully wired Scart where it is possible to have just the picture or picture and left and right audio.
Note: Although S-Video is frequently referred to as S-VHS, technically S-VHS is only a higher resolution recording format. Different combinations that can be obtained are as follows:
Scart - Scart
Fully wired will carry SVHS and audio providing both scart sockets are wired for SVHS.
Scart - Scart
Wired one way - purely for SVHS with or without audio.
