Ngemuva kweminyaka engamashumi eminyaka yokubuka i-analog TV, ukwethulwa kwe-HDTV kuvulwe isipiliyoni sokubukwa kwe-TV ngombala othuthukisiwe nemininingwane. Kodwa-ke, njengomphumela ongathandeki wecala, kusekhona abathengi abaningi ababuka izinhlelo eziningi zethelevishini ze-analog ne-VHS endala kuma-HDTV awo amasha. Lokhu kuye kwakha izikhalazo eziningi mayelana nekhwalithi yesithombe esonakele ebonakalayo yezithombe zethelevishini ye-analog nemithombo yevidiyo ye-analog uma ibhekwa kwi-HDTV.
I-HDTV: Ayinakho & # 39; t Njalo Bheka Ngcono
Umqondo oyinhloko wokwenza ukuxhuma kusuka ku-analog kuya ku-HDTV ukuthola ukufinyelela kwekhwalithi engcono yokubuka. Kodwa-ke, ukuba ne-HDTV akusizi njalo izinto, ikakhulukazi uma ubuka okuqukethwe okungezona okungezona kwe-HD.
Eqinisweni, imithombo yevidiyo ye-analog, efana ne-VHS nekhebula le-analog, ezimweni eziningi, lizobukeka libi nakakhulu kwi-HDTV kunokuba lenze ithelevishini ejwayelekile ye-analog.
Isizathu salesi simo ukuthi i-HDTV inamandla okubonisa imininingwane engaphezu kwe-TV ye-analog, okuyinto ongayicabanga ukuthi yinto enhle - futhi, ingxenye enkulu kakhulu. Kodwa-ke, leyo ntsha ye-HDTV ayifuni ukwenza zonke izinto zibukeke kangcono njengoba iziteshi zokucubungula ividiyo ( ezenza isici esibizwa ngokuthi i-video upscaling ) sithuthukisa kokubili izingxenye ezinhle nezimbi zesithombe esisezingeni eliphansi.
Ukuhlanza nokuqina kwesignali sokuqala, umphumela ongcono oyoba nawo. Kodwa-ke, uma isithombe sinomsindo wesizinda sangemuva, ukuphazanyiswa kwesignali, ukuphuma kwambala, noma izinkinga ezingenqenqemeni, (okungase kungabonakali ku-TV ye-analog ngenxa yokuthi ukuthethelela okukhulu ngenxa yesinqumo esincane) ukucubungulwa kwevidiyo ku-HDTV uzozama ukuyihlanza. Noma kunjalo, lokhu kungaletha imiphumela ehlanganisiwe.
Esinye isici esibangela izinga lokubukwa kwethelevishini ye-analog kuma-HDTV futhi kuncike kwinqubo ye-upscaling esebenzisa abenzi be-HDTV abahlukahlukene. Amanye ama-HDTV enza ukuguqulwa kwe-analog-to-digital nenqubo yokuphakamisa kangcono kunabanye. Lapho uhlola ama-HDTV noma izibuyekezo ze-HDTV, bhala phansi noma yikuphi ukuphawula mayelana nekhwalithi yokuphakamisa ividiyo.
Enye iphuzu elibalulekile okumelwe lenziwe ukuthi abathengi abaningi ukuthuthukiswa ku-HDTV ( futhi manje i-4K Ultra HD TV ) nabo bayathuthukisa usayizi weskrini omkhulu. Lokhu kusho ukuthi njengoba isikrini sithola ngaphezulu, imithombo yevidiyo yokuxazululwa okuphansi (njenge-VHS) izobukeka ibhekene nakakhulu, ngendlela efana nokushaya amafomu omphumela wezithombe kanye nemingcele echazwe kancane. Ngamanye amazwi, okwakubonakala kuhle kakhulu kuleyo TV yakudala engu-27-intshi ye-Analog, ngeke ubukeke kahle kuleyo ntsha entsha ye-LCD HD noma i-4K Ultra HD TV, futhi isebenza nakakhulu kuma-TV angaphezulu esikrinini.
Iziphakamiso Zokuthuthukisa I-HDTV Yokubuka Okuhlangenwe nakho
Kukhona izinyathelo ongazithatha ezingeke zikuvumele ukuthi ukhawule umkhuba wokubuka ividiyo we-analog kwi-HDTV yakho kodwa uma ubona ukuthuthukiswa - lawo mathebula aseVHS amadala ayochitha isikhathi esiningi ekamelweni lakho.
- Qinisekisa ukuthi unesignali engcono kunazo zonke kungenzeka - Uma usebenzisa ikhebula noma i-satellites, shintshela ku-Digital Cable, i-HD Cable noma i-HD Satellite. Uma une-HDTV ephezulu yokusebenza, kungani uchitha imali yakho ngokuyihlinzeka ngomthombo wesignali ophansi - ukhokha amandla we-HD - kufanele uvune imivuzo.
- Uma unebhodi yekhebula le-HD noma ibhokisi le-satellite lesikhathi se-HD, xhuma ku-HDTV usebenzisa uxhumano lwe- HDMI noma i- Component Video (noma yikuphi uhlobo lokuxhumeka elisetshenziselwa ikhebula noma i-satellite box ukudlulisa i-HDTV ne-Digital signals), kunokuba kube nesilinganiso i-screw-on noma i-RF Connection .
- Yeka ukurekhoda nokudlala amateyimu we-VHS futhi urekhode ividiyo yakho yasekhaya noma izinhlelo ze-TV ku-DVD ( nakuba lokhu kuthola ubunzima ngenxa yezici eziningana ), noma i-DVR (mhlawumbe eyodwa enekhono le-HD) kusuka kukhebula lendawo noma isevisi ye-satellite. Eqinisweni, kunezinye ze-DVRs ezitholakalayo zokurekhoda izinhlelo ezingaphezulu kwe-HD TV, njenge- Channel Master DVR + neThe Nuvyyo Tablo .
Okubalulekile
Kulabo abasenayo i-TV ye-analog, khumbula ukuthi zonke izibonakaliso zethelevishini zomsakazo we-analog zaphela ngo- Juni 12, 2009 . Lokhu kusho ukuthi i-TV endala ngeke ikwazi ukuthola izinhlelo ze-TV ngaphandle kokuthi uthole i- analog-to-digital ibhokisi lokuguqula noma, uma ubhalisela ikhebula noma isevisi yesathelayithi, ukuthi uqasha ibhokisi eliye indlela yokuxhumeka kwe-analog (njenge-RF noma i- video ehlanganisiwe ) ehambisana ne-TV yakho. Iningi lezinsizakalo zekhebula linikeza okukhethwa kukho ibhokisi le-mini-converter kumacala anjalo - bhekisa ikhebula lendawo yakho noma umhlinzeki we-satellite ukuze uthole olunye ulwazi.