Uphawu Digital - umgangatho, ukuthembeka, ukhuseleko

ulwazi jikelele Modern liphuhlisa ngokukhawuleza kakhulu, ngoko ke kufuneka nje ukuzama ukuba uhlale kuze mhla kwizixhobo zeteknoloji iyabadodobalisa. Oku kuzakuvumela ukuba uyiphendule utshintsho kwaye ufumane iinkonzo aphezulu umgangatho.

Kuba indoda eziqhelekileyo esitratweni ubume isignali yedijithali okanye analog - simanga ingabangeli umdla. Kodwa xa kukho umbuzo malunga umahluko phakathi iifomati yedijithali kwaye analog okanye nemiqondiso, aqalile ukukhulisa imibuzo. Yinto akukho mfihlakalo ukuba kubuchwepheshe eyakhelwe phezu kwemimiselo analog, kungekudala emva koko, uya kuphelisa ubukho bayo ngokupheleleyo ukunika izintso ngokufuduswa ulwazi "umfanekiso".

Kodwa kude asifikanga lo mzuzu, ukususela kumaxesha ngamaxesha kukho imfuneko ukuguqula uphawu analog edijithali. Kwakhona akuqhelekanga, xa kuyimfuneko ukwenza yedijithali ukuba ukuguqulwa uphawu analog.

Uphawu analog kwi ezingundoqo - lo ngumsebenzi okhethekileyo umsinga data umqondiso, nto leyo linokuchazwa ngokuthi ezithile imisebenzi okuqhubekayo malunga nexesha. Oku kuthetha ukuba le awo oscillation inokuba yiyo nayiphi enexabiso akholise ethile.

uphawu Digital - umsinga data uphawu olulodwa, nto leyo linokuchazwa ngokuthi imisebenzi ethile ekhethekileyo malunga nexesha. Oko kukuthi, awo zayo zingathatha ixabiso kakuhle echazwe kuphela.

Ngokuba uphawu analog iphawulwa linani elikhulu yokuphazamiseka ezahlukeneyo. Uphawu wedijithali inomsebenzisi luncedo ukuhluza uninzi okunamandla ukuphazamiseka. Oku kwenziwa ngokusebenzisa ubuchule bokulungisa yonke idatha yoqobo. Kwakhona, uphawu wedijithali umahluko ukungabikho kweenkcukacha komsebenzi data umlambo, ngelilixa analogu transfer Uphawu ukuba akukho isixa esikhulu umthwalo ulwazi lwesemantiki. Xa ijelo elinye emzimbeni basenokugqithisela iimpawu ezininzi digital, kanti analog enye kuphela.

Uphawu digital inomnye kunazo - oko ukhuseleko yakhe. Ngaloo ndlela, uphawu analog kuxhomekeke phantse nayiphi na impembelelo okanye lihlasele kokusingqongileyo. Ngelo xesha, ukuba unalo ikhono ngamasuntswana kwi khowudi ngokuyinika ngayo ikhowudi ekhethekileyo evela isethi pulses. Oku kususa phantse naluphi na uphazamiseko na abantu abangenayo eli lungelo, kule nkqubo transfer data. Ingqalelo igalelo elibi kuphela "amanani" - oku ukuntsonkotha ukosuleleka phezu imigama emide. Kodwa le ngxaki lula kusombululeka ngokuthi kusetyenziswe izixhobo ezikhethekileyo ukuba kwezwi imisebenzi / demodulation.

Akulula xa uqeqeshelwa ukuba umqondiso lwedijithali azixakekise kakhulu kunye nabasebenzisi kumabonwakude. Kuba abantu abaninzi, i-TV yaye uhlala umthombo kuphela inkcazelo. Ngelo ubuchwepheshe obufanayo lixesha akuthethi ukwamkela "umfanekiso". Kuyimfuneko ke ngoko ukuba usebenzise isixhobo okhethekileyo -preobrazovatel losasazo lwedijithali.

Inokukunceda ukuguqula naluphi na uphawu zedijithali analog oyifunayo. Oku kuthintela iindleko ezongezelelweyo ukwenzela ukuthenga i-TV entsha kwaye ivumela ukusetyenziswa kwedatha digital umgangatho kwifowuni yakho analog.