Common Intermediate Format
<communications> (CIF, or Full CIF (FCIF) to distinguish it from Quarter
CIF (QCIF)) A video format used in videoconferencing systems, which supports
both NTSC and PAL signals, with a data rate of 30 frames per second (fps), with
each frame containing 288 lines and 352 luminance pixels per line. CIF is part
of the ITU H.261 videoconferencing standard.
QCIF, a related video format standard, transfers one fourth as much data as CIF.
QCIF is defined in ITU H.261 as having 144 lines and 176 pixels per line, with
half as many chrominance pixels in each direction. QCIF is suitable for
videoconferencing systems that use telephone lines. The codec standard specifies
that QCIF compatibility is mandatory, and CIF compatibility is optional.
(1999-04-22)
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