Iyini isiqalo se-TV ye-digital?

Njengamanje, ama-TV amaningi wezwe ashukuthela ngokushesha kuhlobo olusha lokusakaza - okuthiwa ithelevishini yedijithali. Lokhu kubangelwa ngokuyinhloko ngekhwalithi engcono kakhulu yomsindo nesithombe, kanye nokuntuleka kokuphazanyiswa nezindleko ezingabizi zezinsizakalo zokugcinwa nokuxhumeka. Noma kunjalo, ezinye izinhlobo ze-TV zanamuhla sezivele zinezakhi ezakhelwe ngaphakathi, kodwa amadivayisi amaningi asadinga isamukeli ukuze aqale ukuthola isignali yedijithali. Ngaphezu kwalokho, imishini eyengeziwe iyadingeka futhi ezinye izinsimbi ezine-receiver.

Ibhokisi le-TV elihlelwe i-Digital TV - yini lokhu?

Isiqalo se-TV yedijithali yidivaysi encane eyenzelwe ngokuqondile ukulungisa isignali yedijithali bese isithumela ku-TV evamile. Njengomthetho, kubizwa ngokuthi i-DVB-T2. Yile ndlela izinga lokusakazwa kwedijithali elikhethiwe namuhla, ngokudluliselwa kwesidingo esikhethekile se-TV digital. Le ndlela yokugcina, ngendlela, izoba nokusekela kokucindezelwa kwesignali yevidiyo etholakalayo kufomethi ye-MPEG-4.

Ngaphezu kwalokho, ibhokisi le-digital ye-digital ye-digital set-top box likuvumela ukuba ubuke iziteshi zedijithali ngokuphelele kubo bonke abantu, kufaka phakathi nabanikazi be-TV zangaphambili ze-analog. Ngesikhathi esifanayo, ochwepheshe bagcizelela ukuthi ukusetha nokufaka imishini esekelwe emoyeni akuthatha isikhathi esiningi futhi akudingi ukuthi abasebenzisi babe namakhono akhethekile nolwazi.

Izinzuzo eziyinhloko zebhokisi le-digital set-top

Njengoba izinzuzo eziyinhloko ebhokisini ngalinye elisethiwe-eliphezulu le-TV ye-digital (imfundo kubo eqinisekisa lokhu), okokuqala umuntu angakwazi ukuhlukanisa indawo enkulu yokusakazwa kwesignali kanye nekhwalithi ephezulu yesithombe ngenxa yomsindo wokuzivikela. Ngaphezu kwalokho, uhlu lwezici ezinhle luhlanganisa ukusebenza kahle kwamandla nokusetshenziswa kwemithombo yemvamisa. Lezi zamuva zihlobene ngokuqondile nokuheha abasakazo abaningi ngenxa yamanani aphansi okudluliselwa kwesignali. Okokugcina, njengenzuzo ecacile, umuntu angakwazi ukukhipha ukwanda kwenani lamathelevishini atholakalayo kubasebenzisi.

Indlela yokukhetha ibhokisi le-digital set set-top

Ukuze ukhethe kahle imodeli enhle kakhulu yomamukeli, kumele uqale uqonde umhlinzeki ozohlinzeka ngethelevishini yedijithali, ngoba izoxhomeka emthonjeni wesignali. Ngaphezu kwalokho, kufanele kucaciswe mayelana nokuthi kungenzeka yini umamukeli othola iziteshi eziphezulu ze-HD. Ngaphezu kwalokho, udinga ukwazi kusengaphambili ukuthi ngabe ibhokisi le-TV elibheke phezulu le-TV linamaphesenti okufinyelela okunemibandela, okukhona okudingekayo ukuthola izinhlelo ezibhalwe nge-smart card. Futhi, uma kunesidingo, ungacela mayelana nokuba khona kwekhono lokubhala nge-USB. Ekuphetheni, kudingekile ukuthola ukuthi kutholakala izikhungo zesevisi zokusebenzisa imishini ethengiwe.