Yuav ua li cas 720p thiab 1080i yog tib yam thiab txawv
720p thiab 1080i yog ob qhov kev txhais cov ntsiab lus yees duab siab, tab sis qhov ntawd yog qhov zoo sib xws tas. Muaj ntau qhov sib txawv ntawm ob qhov uas yuav cuam tshuam rau TV koj yuav thiab TV pom kev.
- 720p yog 1,280 pixels tso tawm kom pom ib qho screen horizontally thiab 720 pixels tso tawm hauv lub vijtsam vertically. Qhov no yields 720 kab kab los yog pixel kab uas xa mus rau ib lub TV lossis lwm yam khoom ntaus ntawv, lossis txhua kab xa raws li lwm qhov (uas yog qhov "p" los ntawm). Tag nrho cov duab (720 kab lossis pixel kab) xa txhua 60th ntawm ib pliag (lossis ob zaug txhua 30th ntawm ib pliag). Tag nrho cov pixels tshwm nyob rau tag nrho 720p npo saum npoo 921,600 (ib nyuag tsawg dua 1 megapixel nyob hauv cov koob yees duab digital).
- 1080i nruab nrab yog 1,920 pixels teem horizontally thiab 1,080 pixels teem vertically. Qhov no yields 1,080 kab rov tav (pixel natwm), xa mus rau ib lub TV alternately (raug xa mus rau ib qho kev sib tshuam hauv interlaced). Hauv lwm txoj kab, txhua tus khib kab los yog pixel kab yuav raug xa mus rau lub TV ua ntej, raws li tag nrho cov kab los yog pixel kab.Qhov no txhais tau hais tias 1080i, txij thaum nws yog interlaced, tsuas xa 540 kab (los yog ib nrab ntawm cov lus qhia) txhua 60th ntawm ib pliag, nrog rau tag nrho cov kev nthuav dav xa txhua txhua 30 ntawm ib pliag. Nyob rau ntawm qhov chaw, 1080i ua ntau dua li 720p, tab sis txij li kev nthuav dav ntxiv tsuas yog xa txhua 1/30 ntawm ib pliag, es tsis yog 1 / 60th ntawm ib pliag, cov khoom siv ceev ceev yuav pom cov khoom sib txuas me ntsis uas sib txawv - uas tuaj yeem tshwm sim xws li cov npoo tawv los sis qhov nyhuv me ntsis.
- Tag nrho cov pixels muaj nyob hauv 1080i cov teeb liab tag nrho, thaum sib txuas ob kab los yog cov kab ua ke, tag nrho 2,073,600. Txawm li cas los xij, nco ntsoov hais tias tsuas yog 1,036,800 pixels raug xa mus txhua 60th ntawm ib pliag.
Txawm hais tias muaj pes tsawg tus pixels rau 720p los yog 1080i npo cov zaub tseem tshuav qhov kev txiav txim siab ntawm kev tshuaj ntsuam, qhov luaj li cas ntawm qhov screen txiav txim seb pes tsawg tus pixels ib nti .
720p, 1080i, thiab koj lub TV
HDTV tawm ntawm koj qhov chaw nres tsheb hauv TV, cable, lossis kev xaib satellite yog 1080i (xws li CBS, NBC, WB) lossis 720p (xws li FOX, ABC, ESPN).
Txawm li cas los xij, txawm tias 720p thiab 1080i yog ob lub ntsiab lus tseemceeb rau kev tshaj tawm HDTV cov teebmeem, uas tsis tau txhais hais tias koj pom cov kevcai no hauv koj qhov screen HDTV.
Nws yog ib qho tseem ceeb uas yuav tsum nco ntsoov tias 1080p (1920 x 1080 kab los yog pixel kab progressively scanned) tsis yog siv hauv TV broadcasting, tab sis yog siv los ntawm ib co cable / satellite cov chaw, cov ntsiab lus hauv internet streaming, thiab, tau kawg, 1080p yog ib feem ntawm Blu-Ray Disc qauv txuj.
Ntxiv thiab, nws yuav tsum tau taw qhia tias feem ntau cov TVs uas tau hais tias yog 720p TVs yeej muaj ib txwm pixel daws teeb meem ntawm 1366 x 76, uas yog technically 768p. Txawm li ntawd los, lawv tau tshaj tawm raws li 720p TVs. Tsis txhob txais tsis meej pem, cov kev teev ntawv no yuav lees txais cov teeb meem 720p thiab 1080i. Dab tsi hauv TV tau ua yog txheej txheem ( teev ) txhua qhov kev daws teeb meem rau nws cov haiv neeg 1366x768 pixel teeb meem.
Ib qho tseem ceeb tshaj plaws uas taw tes yog tias txij li LCD , OLED , Plasma , thiab DLP TVs (Plasma thiab DLP TVs tau raug txiav tawm lawm, tiam sis coob tus tseem siv lawm) tsuas tuaj yeem tso cov duab thaij duab zuj zus xwb, lawv tsis tuaj yeem pom cov teeb liab nyob hauv 1080i.
Rau cov teeb meem no, yog hais tias lub TV 1080i qhia tias TV yuav tsum teev 1080i duab rau 720p los yog 768p (yog tias nws yog 720p lossis 768p TV), 1080p (yog tias nws yog 1080p TV) , lossis txawm 4K (yog tias nws yog 4K Ultra HD TV) .
Yog li ntawd, qhov zoo tshaj ntawm cov duab koj pom ntawm qhov screen yog nyob ntawm seb qhov TV zoo nkauj ua haujlwm zoo li cas - qee qhov TVs ua tau zoo dua lwm tus. Yog hais tias lub TV's processor ua haujlwm zoo, tus duab yuav tso cov npoo tawm thiab tsis muaj cov khoom siv pom zoo rau cov 720p thiab 1080i tawm tswv yim.
Txawm li cas los xij, tus taw qhia tshaj plaws tshaj plaws tias tus processor tsis ua haujlwm zoo yog nrhiav kom pom cov npoo qhov twg hauv cov duab. Qhov no yuav pom tshwm ntxiv rau ntawm 1080i cov khoom xa tuaj raws li lub tshuab ua haujlwm ntawm TV xwb yog los teev cov kev daws teeb meem txog li 1080p los yog mus rau 720p (los yog 768p), tab sis kuj tau ua hauj lwm hu ua "deinterlacing".
Deinterlacing yuav tsum tau hais tias lub TV's processor muab cov khib thiab cov kab los yog pixel kab ntawm cov duab interlaced 1080i tuaj rau hauv ib qho duab loj zuj zus tuaj rau txhua qhov 60th ntawm ib pliag. Qee cov txheej txheem ua qhov no zoo heev, thiab qee tus ua tsis tau.
Lub Kab Hauv Qab
Yuav ua li cas tag nrho cov zauv thiab cov txheej txheem rau koj yog tias tsis tshua zoo li 1080i LCD, OLED, Plasma, lossis DLP TV. Yog hais tias lub rooj sib tham ncaj nraim TV yog tshaj tawm tias yog "1080i" TV, nws yeej txhais tau tias thaum nws tuaj yeem input 1080i teeb liab - nws yuav tsum teev 1080i daim duab mus rau 720p rau kev tshuaj ntsuam. 1080p TVs, ntawm qhov tod tes, tsuas yog tshaj tawm raws li 1080p los yog tag nrho HD TVs thiab txhua cov khoom 720p los yog 1080i uas ntaus tawm mus rau 1080p rau kev tshuaj ntsuam.
Txawm hais tias yog siv 1080i teeb liab rau ntawm 720p lossis 1080p TV , koj tuaj yeem mus pom ntawm qhov screen yog qhov tshwm sim ntawm ntau yam ntxiv nrog rau kev daws teeb meem, nrog rau kev ntsuas refresh tus nqi / kev ua haujlwm ua , xim ua, sib piv, ci ntsa iab, artifacts , thiab video ua ntu thiab ua haujlwm.
Tsis tas li ntawd, raws li kev qhia txog 4K Ultra HD TVs, muaj 1080p thiab 720p TVs ntawm kev ua lag luam tau poob. Nrog rau ob peb yam ntxiv, 720p TVs tau raug txuas mus rau qhov ntau thiab tsawg dua 32-nti thiab tsawg dua - qhov tseeb, tsis yog tsuas yog koj yuav pom cov xov tooj ntawm 1080p TV nyob rau hauv qhov screen loj los sis me dua, tab sis nrog 4K Ultra HD TVs tau tsawg dua, tus xov tooj ntawm 1080p TV nyob rau hauv 40-nti thiab loj qhov screen loj kuj tseem muaj tsawg heev heev.