Standard Image Format. A video format that is a version of CIF and is specific to NTSC or PAL television standards. SIF has 352 x 240 non-square pixels for NTSC.
A format for compressed video specified by the MPEG committee, with resolutions of 352 (horizontal) x 240 (vertical) x 29.97 (fps) for NTSC and 352 (horizontal) x 288 (vertical) x 25.00 (fps) for PAL. SIF-resolution video provides an image quality similar to VHS tape.
Standard interchange format, a spatial data exchange format. A standard or neutral format used to move graphics files between computer systems.
Short for Source Image Format; refers to the original image format on which the source image was taken.
Standard Interchange Format (DOD Project 2851)
Source Interchange Format. A compressed video format standard: 352 × 240, 29.97 fps for NTSC and 352 × 288, 25 fps for PAL and SECAM. Image quality is roughly equivalent to VHS tape.