▁It ▁is ▁not ▁shown ▁on ▁most ▁consumer ▁television ▁screens , ▁unless ▁the ▁user ▁mod ifies ▁the ▁television ' s ▁settings . ▁It ▁is ▁generally ▁considered ▁safe ▁to ▁have ▁elements ▁that ▁shouldn ' t ▁be ▁seen ▁by ▁the ▁view ers ▁placed ▁in ▁this ▁area , ▁such ▁as ▁the ▁edge ▁of ▁the ▁set ▁or ▁c ables ▁and ▁other ▁equipment . ▁However , ▁some ▁television ▁production ▁personnel ▁don ' t ▁place ▁anything ▁in ▁this ▁area ▁they ▁don ' t ▁want ▁view ers ▁to ▁see ▁because ▁the ▁red ▁area ▁is ▁always ▁transm itted ▁and ▁could ▁potentially ▁be ▁seen ▁by ▁a ▁vie wer ▁with ▁the ▁correct ▁equipment . ▁Television ▁stations ▁generally ▁have ▁professional - grade ▁mon itors ▁that ▁can ▁be ▁put ▁into ▁" und ers can " ▁mode . ▁These ▁mon itors ▁often ▁include ▁white ▁lines ▁showing ▁where ▁the ▁title - safe ▁and ▁safe ▁areas ▁are ▁located . ▁In ▁addition , ▁TV ▁tun er ▁cards ▁and ▁DVD ▁players ▁for ▁personal ▁computers ▁often ▁show ▁the ▁entire ▁picture . ▁ ▁The ▁action - safe ▁area ▁( green ▁+ ▁yellow ) ▁and ▁o vers can ▁area ▁( red ) ▁make ▁up ▁the ▁entire ▁transm itted ▁image , ▁or ▁active ▁picture . ▁ ▁In ▁addition ▁to ▁active ▁picture , ▁analog ▁broadcast ▁signals ▁contain ▁blank ing ▁areas ▁that ▁provide ▁tim ings ▁and ▁control . ▁ ▁When ▁applying ▁digital ▁compression ▁such ▁as ▁M PE G - 4 , ▁it ▁is ▁only ▁sensible ▁to ▁compress ▁picture ▁that ▁actually ▁exists , ▁and ▁active ▁picture ▁is ▁what ▁is ▁used ▁— ▁including ▁areas ▁not ▁available ▁in ▁action -