Digital Video Main Page 
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Formats:
| Film Format | Film | ratio | Resolution (Pixels) | Resolution (Lines) |
| Full Aperture | 24.57 mm | 1.32:1 | 4096 | 3112 |
| Academy | 21.94 | 1.33;1 | 3656 | 2664 |
| Cinemascope | 21.94 | 1.18:1 | 3656 | 3112 |
| VistaVision | 24.57 | 1.50: 1 | 6144 | 4096 |
| Video Format | Lines X Pixels | Interlace | Color Sampling | Bits | Fields/sec |
| NTSC (525 System) | 485 x 720 | 2:1 | 4 2 2 | 8 | 59.94 |
| PAL (625 System) | 575 x 720 | 2:1 | 4 2 2 | 8 | 50 |
| SECAM | 575 x 720 | 2:1 | 4 2 2 | 8 | 50 |
| HDTV Systems | |||||
| 1125 System | 1035 x 1920 (1.85:1) | 2:1 | 4 2 2 | 8 | 60 |
| 1080 System | 1080 x 1920 (1.78) | 2:1 | 4 2 2 | 8 | 60 |
| 1250 System | 1152 x 1920 (1.67:1) | 2:1 | 4 2 2 | 8 | 60 |
NTSC (National Television Standards Committee) is used in North and Central America, and Japan.
PAL (Phase Alternation Line) is used in Europe, Middle east, East Africa, and South America.
SECAM (Systeme Electronique pour Couleur avec Memoire) is a PAL variant used in France and Russia.
| VHS/8mm | SVHS/Hi-8 | Laserdisc | BetaSP | |
| Color | Composite | Y/C | Composite | Component |
| Lines of Resolution | 240 | 400 | 240 | 360 |
| Signal Bandwidth | 2.5 MHz | 4.5 MHz | 4.5 MHz | 7.5MHz |
Analog Video does not use the RGB color model but instead the YUV (Y = Luminance, U = Hue, and V = Saturation) model. This is very similar to the HSV color model. This ensured compatibility between older black and white television sets (which only use the Y value that describes an intensity for each pixel between black and white) and color models which require the color information (Hue and Saturation). This NTSC standard was established in 1953.
The original analog signal is acquired, via a camera, as an RGB signal. For NTSC encoding this is changed into three components: Yellow, Red-Yellow, and Blue-Yellow. These are the BetaSP Components. S-Video (SVHS and Hi-8) combines the different components into one composite signal. This combination of the three signals into one causes a loss of quality.
Last changed July 08, 1999, G. Scott Owen, owen@siggraph.org