1. From analog to digital

1.1 A reminder of existing standards

Color systems have been developed to ensure compatibility with black and white systems.

The R (red), V (green), B (blue) components at the camera output are summed to give a luminance signal: $Y=\mathrm{0,299}R+\mathrm{0,587}V+\mathrm{0,114}B$

The color information is then coded according to the chosen standard.

There are three main TV standards used in the world today:

• the American NTSC (National Television Systems Committee) ;

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