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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.