'''උච්ච-විශදතා රූපවාහිනිය''' (හෝ '''HDTV''') isයනු video that has [[Image resolution|resolution]] substantially higher than that of traditional television systems (standard-definition TV, or [[Standard-definition television|SDTV, or SD]]). HDTV has one or two [[Megapixel|million pixels]] per frame, roughly five times that of SD. Early HDTV broadcasting used analog techniques, but today HDTV is [[Digital television|digitally]] [[broadcasting|broadcast]] using [[video compression]].