Common Intermediate Format
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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". These two formats are common in video encoding. To have fourth 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 refered to as D1 video (based upon Sony's D1 format).
| Format | NTSC-based | PAL-based |
|---|---|---|
| SQCIF | 128 × 96 | |
| QCIF | 176 × 120 | 176 × 144 |
| CIF | 352 × 240 | 352 × 288 |
| 4CIF | 704 × 480 | 704 × 576 |
| 9CIF | 1056 × 720 | 1056 × 864 |
| 16CIF | 1408 × 960 | 1408 × 1152 |
| D1 | 720 × 486 | 720 × 576 |
| SIF | 352 × 240 | 352 × 288 |
| SIF* | 360 × 240 | 360 × 288 |
- * = Rounded to the nearest multiple of 16.
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