Audio/Video Glossary - Format(video)There is an enormous variety of video formats. They vary in tape width - 4mm, 8mm, 1/2 inch, 3/4 inch, 1 inch, etc.; in signal formats - composite, YC and component video; and in operation - analog or digital. In addition, digital formats themselves take various forms - no single standard prevails. Also, all formats exist in PAL, NTSC and SECAM and their sub-standards, which implies that any video production studio requires an extensive range of interface devices to enable equipment designed for a specific format to work with devices designed for other formats.