color composite video signal (CCVS)
The analogcomposite video signal, also called composite video, contains all color, black and white, blanking and synchronization signals. It is composed of the luminance signal, which contains the brightness information, the chrominance signal, which consists of the two color difference signals, the vertical and horizontal blanking signals, and the inserted sync pulses.
In the PAL television standard, an FBAS signal has a line duration of 64 µs. This includes 12 µs for the horizontal blanking. This means that 52 µs per line are available for the picture content. The highest level of the FBAS signal corresponds to the highest brightness value, the whitevalue. The white level has a video level of 100 % related to the blanking level and an absolute level of 0.7 volts. Together with the blanking level, this results in a total amplitude of 1 volt. The black level is above the sync pulses, so they are in the black region. The black level has a video level of 0% and an absolute level of 0 volts.
In the vertical, a field with a duration of 20 ms consists of 312.5 lines. A full frame consists of 625 lines. Due to the vertical blanking interval, which is 50 lines long, 575 of these lines are visible.