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Quarter Common Intermediate Format is a notable phone video format that has a data rate of 30 frames per second with each of those frames containing 144 lines and 176 pixels per line.
QCIF support is required by the ITU H.261 videoconferencing standard.
The resolution is one fourth the resolution of full CIF. QCIF resolutions are:
Qcif is a subset of D1 just like CIF.