rganisms or machines, see  Color vision.vteAnalog television broadcasting topicsSystems180-line343-line375-line405-line (System A)441-line455-line525-line (System M)625-line (System B, System C, System D, System G, System H, System I, System K, System L, System N)819-line (System E, System F)Color systemsNTSCNTSC-JClear-VisionPALPAL-MPAL-SPALplusSECAMVideoBack porch and front porchBlack levelBlanking levelChrominanceChrominance subcarrierColorburstColor killerColor TVComposite videoFrame (video)Horizontal scan rateHorizontal blanking intervalLumaNominal analogue blankingOverscanRaster scanSafe areaTelevision linesVertical blanking intervalWhite clipperSoundMultichannel television soundNICAMSound-in-SyncsZweikanaltonModulationFrequency modulationQuadrature amplitude modulationVestigial sideband modulation (VSB)TransmissionAmplifiersAntenna (radio)Broadcast transmitter/Transmitter stationCavity amplifierDifferential gainDifferential