720p thiab 1080i yog ob qho tib si kev daws teeb meem video siab, tab sis qhov ntawd yog qhov uas qhov zoo sib xws xaus. Qhov sib txawv ntawm ob yuav cuam tshuam rau TV koj yuav thiab koj qhov kev pom.
Cov ntaub ntawv no siv tau rau TV los ntawm ntau lub tuam txhab suav nrog, tab sis tsis txwv rau, cov tsim los ntawm LG, Samsung, Panasonic, Sony, thiab Vizio.
720p yog dab tsi
720p yog daim duab uas muaj 720 kab ntawm 1, 280 pixels. 720 kab kab rov tav lossis kab pixel tshwm nyob rau hauv TV lossis lwm yam khoom siv tau nce zuj zus, lossis txhua kab lossis kab xa mus rau lwm qhov (uas yog qhov "p" los ntawm). Tag nrho cov duab refreshes txhua 60th ntawm ib thib ob (los yog ob zaug txhua 30th ntawm ib ob). Tag nrho cov pixels tso tawm rau tag nrho 720p npo saum npoo yog 921, 600 (me ntsis tsawg dua 1 megapixel hauv cov ntsiab lus digital koob yees duab).
Yim 1080i yog
1080i yog daim duab uas muaj 1, 080 kab ntawm 1, 920 pixels. Tag nrho cov kab khib lossis kab pixel raug xa mus rau TV ua ntej, ua raws li tag nrho cov kab txawm lossis pixel kab. Txij li thaum 1080i yog interlaced, tsuas yog 540 kab (lossis ib nrab ntawm cov ntsiab lus) raug xa tawm txhua 60th ntawm ib thib ob, nrog rau tag nrho cov ntsiab lus xa txhua 30th ntawm ib thib ob. 1080i ua kom nthuav dav ntau dua 720p, tab sis txij li qhov nthuav dav ntxiv tsuas yog xa tawm txhua 1/30th ntawm ib thib ob, ntau dua li 1/60th ntawm ib thib ob, cov khoom txav ceev yuav nthuav tawm me ntsis interlacing artifacts, uas tuaj yeem pom zoo li cov npoo jagged. los yog me ntsis qhov muag plooj. Tag nrho cov pixels nyob rau hauv ib tug ua tiav 1080i teeb liab, ib zaug ob interlaced kab los yog kab ua ke, tag nrho 2, 073, 600. Txawm li cas los xij, tsuas yog hais txog 1, 036, 800 pixels raug xa tawm txhua 60th ntawm ib ob.
Txawm hais tias tus lej pixels rau 720p lossis 1080i npo zaub tseem nyob tas li hais txog qhov loj ntawm lub vijtsam, qhov loj ntawm lub vijtsam txiav txim siab pes tsawg pixels ib nti.
720p, 1080i, thiab Koj TV
HDTV tshaj tawm los ntawm koj lub chaw TV hauv zos, cable, lossis satellite kev pabcuam yog 1080i (xws li CBS, NBC, WB) lossis 720p (xws li FOX, ABC, ESPN). Txawm li cas los xij, qhov ntawd tsis tau txhais hais tias koj tab tom pom cov kev daws teeb meem ntawm koj lub vijtsam HDTV.
1080p (1920 x 1080 kab lossis pixel kab nce qib scanned) tsis siv hauv kev tshaj tawm hauv TV, tab sis yog siv los ntawm qee cov chaw muab xov tooj / satellite, cov kev pabcuam hauv internet cov ntsiab lus streaming, thiab yog ib feem ntawm Blu-duab tshav Disc hom standard.
Feem ntau TVs uas tau sau npe tias 720p TVs yeej muaj qhov daws teeb meem hauv pixel ntawm 1366x768, uas yog technically 768p. Txawm li cas los xij, feem ntau lawv tau tshaj tawm raws li 720p TVs. Tsis txhob ntxhov siab; cov teeb no yuav tau txais 720p thiab 1080i teeb liab. Qhov TV yuav tsum tau ua yog ntsuas qhov kev daws teeb meem tuaj rau nws qhov kev daws teeb meem 1366x768 pixels.
Lwm yam tseem ceeb uas yuav tsum tau taw qhia yog tias LCD (LED / LCD), OLED, Plasma, thiab DLP TVs tsuas tuaj yeem tso saib cov duab nrawm dua - lawv tsis tuaj yeem tso cov teeb liab 1080i tiag.
Plasma thiab DLP TVs tau raug txiav lawm, tab sis ntau tus tseem siv.
Yog tias 1080i teeb liab pom ntawm ib qho ntawm cov TV saum toj no, nws yuav tsum ntsuas qhov teeb liab mus rau 720p lossis 768p (yog tias nws yog 720p lossis 768p TV), 1080p (yog tias nws yog 1080p TV), lossis txawm tias 4K (yog tias nws yog 4K Ultra HD TV).
1080p thiab 4K TVs nce qib 720p rau kev tshuaj ntsuam.
Raws li kev ntsuas qhov ntsuas, qhov zoo ntawm cov duab koj pom ntawm lub vijtsam yog nyob ntawm seb TV tus txheej txheem video ua haujlwm zoo npaum li cas. Yog tias TV's processor ua haujlwm zoo, cov duab yuav pom cov npoo du thiab tsis muaj cov khoom siv pom zoo rau ob qho tib si 720p thiab 1080i input qhov chaw.
Ib lub cim qhia tias lub tshuab ua haujlwm tsis ua haujlwm zoo yog nrhiav cov jagged npoo ntawm cov khoom hauv daim duab. Qhov no yuav pom tau ntau dua ntawm cov khoom xa tuaj 1080i raws li TVs processor tsuas yog yuav tsum ntsuas qhov kev daws teeb meem mus txog 1080p lossis nqis mus rau 720p (lossis 768p), tab sis kuj yuav tsum tau ua txoj haujlwm hu ua "deinterlacing".
Deinterlacing xav kom TV's processor muab cov khib thiab txawm kab lossis pixel kab ntawm cov duab 1080i nkag mus rau hauv ib qho kev nce qib kom pom txhua 60th ntawm ib thib ob. Qee tus processors ua qhov no zoo heev, thiab qee qhov tsis ua.
Txoj kab hauv qab
Tsis txhob bogged nrog tag nrho cov lej thiab cov ntsiab lus tech. Qhov tseem ceeb uas yuav tsum nco ntsoov yog tias tsis muaj qhov zoo li 1080i LCD, OLED, Plasma, lossis DLP TV.
Yog tias cov TVs no tau tshaj tawm raws li "1080i" TV nws txhais tau tias thaum nws tuaj yeem nkag mus rau 1080i teeb liab, nws yuav tsum ntsuas 1080i duab rau 720p lossis 1080p rau kev tshuaj ntsuam.
Txawm hais tias nkag mus rau 1080i teeb liab ntawm 720p lossis 1080p TV, qhov koj pom ntawm lub vijtsam yog qhov tshwm sim ntawm ntau yam ntxiv rau kev daws teeb meem, suav nrog kev tshuaj ntsuam refresh npaum li cas / kev ua haujlwm, kev ua xim, sib piv, brightness, tom qab video suab nrov thiab artifacts, thiab video scaling thiab ua.
Tsuas tsuas yog qee qhov kev zam, 720p TVs tau raug tso tawm mus rau 32-nti thiab qhov screen me me. Koj tseem yuav pom cov xov tooj loj zuj zus ntawm 1080p TVs hauv qhov screen loj lossis me dua, tab sis nrog 4K Ultra HD TVs tau txais qis dua, tus naj npawb ntawm 1080p TVs hauv 40-nti thiab qhov screen loj dua kuj dhau los ua ntau tsawg.
