|CIF, D1 & Mega-pixel Frame Size|
CIF is Common Intermediate Format. It is a format used to standardize the horizontal and vertical resolutions in pixels of video signals, commonly used in video teleconferencing systems.
Format Video Resolution
D1 is Digital First. It was the first major professional digital video format introduced in 1986 by the Society of Motion Picture and Television Engineers. D-1 resolution is 720 × 480 for NTSC systems and 720 × 576 for PAL systems. It is roughly 4 times higher than CIF in pixel resolutions.
Mega-Pixels means the horizontal and vertical resolutions when multiplied produce a figure over 1,000,000. For example High Definition TV is 1920 x 1080 (= Over 2,000,000 pixels) and is in the class of mega-pixels.