Panali kusintha kwakukulu kuchokera ku mafilimu a analog kupita ku digito ku US ku June 12, 2009, zomwe zinasintha njira zonse zomwe ogula amalandira ndi kuwonerera TV, komanso kusintha ma TV omwe alipo kuti agule.
Ngakhale kutumiza kwa kanema kanema kuchokera ku analog kupita ku digito ku US pa June 12, 2009, pakadalibe ogula omwe angakhale akuyang'ana masitepe ochepa omwe ali otsala a TV, akulembera ku ma TV a analog chingwe, ndi / kapena kupitiriza kuyang'ana video ya analog magwero, monga VHS, pa analog, digito, kapena HDTVs. Zotsatira zake, makhalidwe a analog TV akadali chinthu chofunika kwambiri kuti adziwe.
Zotsatira Zanema za Analog
Kusiyanitsa pakati pa Analog TV ndi Digital TV kumayambira momwe zizindikiro za TV zimatumizidwira kapena kuchotsedwa kuchokera ku gwero kupita ku TV, zomwe zimayambitsa mtundu wa TV wogulayo ayenera kuigwiritsa ntchito kulandira chizindikiro. Izi zikugwiritsanso ntchito njira yomwe DTV yotembenuza bokosi (Kugula ku Amazon) iyenera kutumiza chizindikiro ku TV ya analog, yomwe ndi yofunikira kwa ogulawo omwe amagwiritsa ntchito otembenuza DTV kuti alandire mapulogalamu a kanema pa TV .
Pamaso pa kusintha kwa DTV kusintha, zizindikiro zofanana za TV zamagetsi zinkaperekedwa mwa njira yofanana ndi wailesi.
Ndipotu, kanema kanema kanema kanema ka analog kanasindikizidwa mu AM, pamene audio inkafalitsidwa mu FM. monga zotsatira, analog TV transmissions anali kusokonezeka, monga mkuntho ndi chisanu, malingana ndi mtunda ndi malo TV kulandira chizindikiro.
Kuonjezera apo, kuchuluka kwa bandwidth choperekedwa ku kanema wa kanema wa analogi kumangopangitsa chisankho ndi khalidwe lonse la fanolo. Mafilimu a ma TV a analog (ku US) adatchedwa NTSC .
NTSC inali yoyera ya US yomwe inavomerezedwa mu 1941, ndipo inagwiritsidwa ntchito kwambiri pambuyo pa nkhondo yachiwiri ya padziko lonse. NTSC yakhazikika pamasamba 525, 60 masentimita / makumi awiri pamphindi pa 60Hz njira yofalitsira ndi kusonyeza zithunzi za kanema. Imeneyi ndi njira yopangidwira yomwe felemu iliyonse imasankhidwa m'magulu awiri a mizere 262, yomwe ikuphatikizidwa kuti isonyeze chithunzi cha kanema ndi mizere 525 yokujambulira.
Machitidwewa amagwira ntchito, koma kuvomereza kumodzi ndikutulutsa mtundu wa TV sikunali gawo la equation pamene dongosololo linavomerezedwa kuti agwiritsidwe ntchito ndi ogulitsa. Chotsatira chake, kukhazikitsidwa kwa mtundu mu mawonekedwe a NTSC mu 1953 nthawizonse wakhala kufooka kwa dongosolo, motero mawu akuti NTSC adadziwike ndi akatswiri ambiri monga "Kawiri kawiri Yemweyo Maonekedwe". Zindikirani kuti khalidwe la mtundu ndi kusinthasintha zimasiyana pang'ono pakati pa magalimoto?
Zomwe Zimayambira pa TV Zomwe Zimasiyana ndi Zomwe Zimasiyanasiyana ndi TV
TV TV , kapena DTV , kumbali ina, imafalitsidwa ngati zidziwitso za deta, monga momwe deta yanu yalembedwera kapena momwe nyimbo kapena kanema imalembedwa pa CD, DVD, kapena Blu-ray Disc. Chizindikiro cha digito chimapangidwa ndi 1 ndi 0. Izi zikutanthawuza kuti chizindikiro chofalitsidwa chiri "pa" kapena "chokani". Popeza zizindikiro zadijito zili zomalizira, khalidwe la chizindikiro silimasiyana pamtunda wapadera wokhudzana ndi mphamvu zowonjezera.
Mwa kuyankhula kwina, cholinga cha teknoloji yopatsira chidziwitso cha DTV ndi chakuti wowona amawona fano kapena palibe. Palibe kutayika kwapadera kwa chizindikiro chosonyeza kuti mtunda wochokera ku transmitter ukuwonjezeka. Ngati wowonayo ali patali kwambiri ndi wotumiza kapena ali malo osayenera, palibe chowona.
Komabe, mosiyana ndi TV ya analog, TV yamakono yalinganizidwa kuchokera pansi mpaka kutenga zinthu zonse zazikuluzikulu za chizindikiro cha televizioni kuganiziridwa: B / W, mtundu, ndi mauthenga omwe amatha kufalikira ngati mizere yomwe imasankhidwa mu masamba ena) kapena kupitilira (mizere yojambulidwa mu chizindikiro chofanana) . Zotsatira zake, pali kukhulupirika kwakukulu ndi kusinthasintha kwa zizindikiro.
Kuonjezerapo, popeza chizindikiro cha DTV chimapangidwa ndi "bits", kukula komweko kumagetsi kamene kamatengera chizindikiro cha pulogalamu ya analogi yamakono, sichikhoza kulumikiza chithunzi chapamwamba pa digito, koma malo ena osagwiritsidwa ntchito pa chizindikiro cha TV Angagwiritsidwe ntchito pazowonjezera mavidiyo, audio, ndi malemba.
Mwa kuyankhula kwina, ofalitsa amatha kupereka zinthu zambiri, monga kuzungulira ponseponse, mauthenga ambiri a chinenero, mauthenga a mauthenga, ndi zina zambiri m'deralo lomwe tsopano likukhala ndi chizindikiro cha TV ya analog. Komabe, palipanso mwayi wapadera wa malo a Digital TV channel; luso lopereka chizindikiro cha High Definition (HDTV) .
Pomalizira pake, kusiyana kwina pakati pa TV ndi TV ya Analog ndizofalitsa mapulogalamu muwonekedwe loyera (16x9) . Maonekedwe a chithunzichi akufanana kwambiri ndi mawonekedwe a kanema, yomwe imathandiza owona kuona filimuyo ngati wopanga filimuyo. Mu masewera, mungathe kuchita zambiri pa kamera kamodzi, monga kuyang'ana kutalika kwa mpira wa mpira popanda kuoneka ngati kutali ndi kamera.
Chithunzi cha 16x9 chiwerengero cha TV chikhoza kusonyeza zithunzi zosaoneka bwino popanda malo ochuluka a chithunzi omwe amachokera m'mwamba ndi pansi pazithunzi zofiira, zomwe mumawona ngati zithunzizi zikuwonetsedwa pa TV. Ngakhale magwero omwe si a HDTV, monga DVD angagwiritsenso ntchito 19x9 maonekedwe a TV.
Kuchokera ku DTV mpaka HDTV ndi Pambuyo ...
Chinthu chochititsa chidwi chosonyeza kuti kusintha kuchokera ku Analog kupita ku Digital TV ndi sitepe imodzi yokha. Ngakhale ma HDTV onse ali ndi TV TVS, osati ma TV onse a TV ndi HD, ndipo si onse a TV ndi ma TVTV. Kuti mudziwe zambiri pazinthu izi, komanso momwe 4K, komanso 8K, zinthu zowonjezera, onani zotsatirazi zotsatirazi: