Common Intermediate Format
Encyclopedia : C : CO : COM : Common Intermediate Format
CIF (Common Intermediate Format) is used to standardize the horizontal and vertical resolutions in pixels of YUV sequences in video signals. QCIF means "Quarter CIF". SQCIF means "Sub-quarter CIF". These two formats are common in video encoding. To have one fourth of the area as "quarter" implies, height and width of the frame are halved. A CIF is commonly defined as one-quarter of the 'full' resolution of the video system it is intended for (listed below as 4CIF). Note that this full resolution does not match what is currently referred to as D1 video (based upon Sony's D1 format).
| Format | NTSC-based | PAL-based |
|---|---|---|
| SQCIF | 128 × 96 | |
| QCIF | 176 × 120 | 176 × 144 |
| QCIF+ | 176 × 220 | 176 × 220 |
| CIF | 352 × 240 | 352 × 288 |
| 4CIF | 704 × 480 | 704 × 576 |
| 9CIF | 1056 × 720 | 1056 × 864 |
| 16CIF | 1408 × 960 | 1408 × 1152 |
| D1 | 720 × 480 | 720 × 576 |
| SIF* | 352 × 240 | 352 × 288 |
| SIF | 360 × 240 | 360 × 288 |
- * = Rounded to the nearest multiple of 16.
See also
From Wikipedia, the Free Encyclopedia. Original article here. Support Wikipedia by contributing or donating.
All text is available under the terms of the GNU Free Documentation License See Wikipedia Copyrights for details.