Also reference white level. The IEEE scale, or voltage level, of the video picture signal that corresponds to a specified maximum limit for white peaks.
This part of the video signal electronically represents the white part of an image. It resides at 0.7 V from the blanking level, whereas the black part is taken as 0 V.
In the active video portion of the video waveform, the 1.0-volt (100 IRE) level. See also video waveform.
In television, the signal level that corresponds to the maximum picture brightness. The white level is set by the contrast control.