Paiva nekushanduka kukuru kubva kuAnalogo kusvika kuIndaneti kubudiswa kweTV kuU.S. kuU.S. paJune 12, 2009, izvo zvakashandura zvose nzira iyo vatengi vanogamuchira uye vanotarisa TV, pamwe nekushandura kuti terevhizheni dzaiwanika kutenga.
Kunyange zvazvo kutapura terevhizheni kwakachinja kubva kune analogog kusvika kudivi muUnited States musi waJune 12, 2009, kuchine vatengi vangave vachitarisa mashoma mashomanana emagetsi e-analog e-TV, kubhadhara kune analog cable TV services, uye / kana kuti ramba uchiona vhidhiyo yeAnalogog zvitubu, zvakadai seVHS, pane analogo, digital, kana HDTVs. Somugumisiro, maitiro eTanalog TV achiri chiitiko chinokosha chokuziva.
Analog TV Basics
Musiyano pakati peAnalog TV neDhidhiyo yeTV inotangira nenzira iyo signal yeTV inoparidzirwa kana kutamidzwa kubva mumugero kuenda kuTV, iyo inotaridzira rudzi rweTV mutengi unoda kushandisa kuti agamuchire chiratidzo. Izvi zvinoshandawo nenzira iyo DTV converter box (Kutenga kubva kuAmazon) inofanira kutumira chiratidzo kune TV yeAnalogog, iyo inokosha kune avo vatengi vanoshandisa vatendeuki veDTV kuti vagamuchire zvirongwa zveterevhizheni paTV anogadzirwa .
Pamberi peDTV Transition yakanga iri panzvimbo, zviratidzo zvemaaniramu zveTV dzakaparidzirwa nenzira yakafanana neredhiyo.
Zvechokwadi, chiratidzo chevhidhiyo cheterevhizheni reanalogog chakaparidzirwa muna AM, apo mutinhiyo waiparidzirwa mu FM. sechigumisiro, analog TV TV transmissions dzaiiswa pasi pekupindira, zvakadai sokuputika uye chando, zvichienderana nechekure uye nzvimbo yeTV ichigamuchira chiratidzo.
Mukuwedzera, chiyero chebhanwidth chinopiwa kune analog TV chiteshi chinogadzirisa chisarudzo uye huwandu hwehuwandu hwechifananidzo. Nhamba yekutengesa TV yeAnalogog (muUnited States) yakatumidzwa seNTSC .
NTSC ndiyo yaiva yeUnited States yakagamuchirwa muna 1941, uye yakasvika mukushandiswa kwakakurumbira mushure meHondo Yenyika II. NTSC inobva kune 525-line, 60 munda / 30 mafaira-per-yechipiri pa 60Hz chirongwa chekutumira uye kuratidzwa kwezvifananidzo zvevhidhiyo. Iyi ndiyo nzira inopindira iyo iyo firimu imwe inotaridzirwa mumatanho maviri emirara 262, iyo zvino inosanganiswa kuratidzira fomu yevhidhiyo ne 525 scan lines.
Iyi sangano inoshanda, asi imwe yeruzhinji ndeyekuti mutambo weTV kuparidzira hakusi chikamu chekuenzanisa apo sarudzo yakabvumirwa kune zvekutengeserana uye kushandiswa kwevatengi. Somugumisiro, kushandiswa kwemuvara muhutano hweNTSC muna 1953 kwave kuchiri kushaya simba kwehurongwa, saka izwi rokuti NTSC rakazozivikanwa nevakawanda vevashandi se "Usati Wakawiri Wakafanana Wakafanana". Chimbocherechedza kuti ruvara rwehutano uye kushanduka kunosiyana zvakanyanya pakati pezvitoro?
Digital TV Basics uye Kusiyana Kubva Analog TV
Dhidhiyo TV , kana DTV , kune rumwe rutivi, inoparidzirwa se data bits of information, sezvo data yekombiyuta yakanyorwa kana kuti mimhanzi kana vhidhiyo yakanyorwa pane CD, DVD, kana Blu-ray Disc. Chiratidzo che digital chinoumbwa ne1 uye 0's. Izvi zvinoreva kuti chiratidzo chinoparidzirwa chiri "pa" kana "kure". Sezvo zviratidzo zvemajeri zvakapera, hutano hwechiratidzo hahusiyanisi mune imwe nzvimbo yakatarisana nechokubuda kwemasimba emutumira.
Mune mamwe mazwi, chinangwa chekombiki yekutumira DTV ndechekuti muoni angaona mufananidzo kana kana zvachose. Ikoko hakuna kuraswa kwemashoko ekufamba-famba sezvo chikamu chinobva kuchitemesa chinowedzera. Kana muoni ari kure nemhepo kana kuti ari munzvimbo isina kunaka, hapana chaungaona.
Kune rumwe rutivi, zvakasiyana neAnalogog TV, digital TV yakagadzirwa kubva pasi kusvika kutora zvinhu zvose zvakanyanya zvechiratidzo cheterevhizheni chichifunga nezvazvo: B / W, ruvara, uye rwamunzwi uye inogona kuparadzirwa sechinyorwa (mitsara yakarongedzwa alternate minda) kana kufambira mberi (mitsetse yakarongedzwa mumutsara wakafanana) chiratidzo. Somugumisiro, pane kuvimbika kwakakura uye kushanduka kwemashoko zvigadzirwa.
Uyezve, sezvo chiratidzo cheDTV chakaumbwa ne "bits", iyo imwe bandwidth size iyo inotora mhizha yeAnalogog TV, inogona kugadzirisa kwete chimiro chepamusoro chepamhando mudijiti, asi imwe nzvimbo isina kushandiswa mureza weTV inogona kushandiswa kune mamwe mavhidhiyo, manzwi, uye mavara.
Mune mamwe mazwi, vaparidzi vanogona kupa zvinhu zvakawanda, zvakadai sedzindo rakapoteredza, mitauro yakasiyana-siyana yemutauro, mavara ekunyora, uye nezvimwe munzvimbo yakatarwa ikozvino inotarwa nemuenzaniso wakafanana wekufananidzira TV. Zvisinei, pane rimwezve ruzivo rwekugona kweDhidhiyo yeTV yechiteshi; kukwanisa kutumira chiratidzo cheHigh Definition (HDTV) .
Pakupedzisira, mumwe musiyano pakati peDhidhiyo TV neAnalog TV ndiyo inokwanisa kuparadzira zvirongwa mumutambo wakachena (16x9) . Chimiro chemufananidzo wacho chinonyanya kufanana nechinangwa chemafirimu, izvo zvinoita kuti muoni aone firimu semuiti wemagetsi aida. MuMutambo, unogona kuwana zvakawanda zvechiito mune imwe kamera kupfura, zvakadai sekuona urefu hwose hwebhora rebhora pasina kuita sekutaridzika kure kure nekamera.
A 16x9 yakaenzana nehuwandu hweTV inogona kuratidza mifananidzo yakachena isina ruvara rwemufananidzo wepakati yakatorwa nemabhadhi mutsvuku kumusoro uye pasi pechifananidzo chegreen, ndicho chaunoona kana mifananidzo yakadaro ichiratidzwa paTV yakazara. Kunyange kunyange zvisina mavhidhiyo eHTV, akadai seDVD anogonawo kushandisa zvinyorwa zve19x9 zvakaenzana neTV.
Kubva kuDTV kusvika kuHDTV uye Kupfuura ...
Chinhu chimwe chinonakidza kuratidza ndechokuti kuchinja kubva kuAnalog kusvika kune Digital TV kune imwe danho. Kunyange zvazvo maHTT ose ari Digital TVS, haisi yose yeDhidhiyo inobudisa TV ndeyeHD, uye kwete dzose dzeTV maTVV. Nokuda kweizvi panyaya idzi, uyewo ma 4K, uye kunyange 8K, zvinhu mukati mokusanganiswa, tarisa mazano anotevera anotevera pamusoro apa: