Source Input Format (SIF) defined in MPEG-1, is a video format that was developed to allow the storage and transmission of digital video. 625/50 SIF format (PAL/SECAM) has a resolution of 352 × 288 active pixels (half of PAL 704 × 576) [or 360 × 288 active pixels (half of PAL 720 × 576)] and a refresh rate of 25 frames per second.
Source Input Format (SIF) defined in MPEG-1, is a video format that was developed to allow the storage and transmission of digital video. 625/50 SIF format (PAL/SECAM) has a resolution of 352 × 288 active pixels (half of PAL 704 × 576) [or 360 × 288 active pixels (half of PAL 720 × 576)] and a refresh rate of 25 frames per second.
Source: Wikipedia "Source Input Format" · CC BY-SA 4.0
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