Thaum yuav khoom rau TV, koj tuaj yeem hla cov ntsiab lus 4K thiab HDR. Ob qho ntawm cov thev naus laus zis no txhim kho cov duab zoo. Txawm li cas los xij, lawv ua li ntawd hauv ntau txoj kev sib txawv. Cia peb hla lub suab nrov thiab kawm seb 4K thiab HDR txhais li cas.
Kev Tshawb Nrhiav Txhua Yam
- Hais rau kev tshuaj ntsuam daws teeb meem (tus naj npawb ntawm pixels ib lub vijtsam tuaj yeem haum).
- Siv synonymously nrog Ultra HD (UHD). Hais txog qhov kev daws teeb meem kab rov tav ntawm 4,000 pixels.
- Yuav tsum tau UHD-tshaj cov khoom siv thiab cov khoom siv kom tsis txhob muaj qhov nce ntxiv.
- Stand rau High Dynamic Range.
- Wider xim gamut thiab qhov sib txawv ntau dua Standard Dynamic Range (SDR).
- Lub suab ci ntsa iab yog ua kom ci dua yam tsis muaj overexposing. Tsaus tones yog ua kom tsaus yam tsis muaj underexposing.
4K thiab HDR tsis yog cov qauv sib tw. 4K hais txog kev daws teeb meem ntawm lub vijtsam (tus naj npawb ntawm pixels uas haum rau ntawm lub vijtsam TV lossis zaub). Nws qee zaum hu ua UHD lossis Ultra HD, txawm hais tias muaj qhov sib txawv me ntsis.
HDR stands rau High Dynamic Range thiab hais txog qhov sib piv lossis xim ntau ntawm cov suab nrov tshaj plaws thiab tsaus tshaj plaws hauv cov duab. HDR muab qhov sib piv ntau dua-lossis loj dua xim thiab qhov ci ci-tshaj li Standard Dynamic Range (SDR), thiab muaj kev cuam tshuam ntau dua li 4K. Uas tau hais tias, 4K muab cov duab zoo dua, txhais tau ntau dua.
Ob tus qauv tau nce ntau ntawm cov xov tooj zoo tshaj digital, thiab ob qho tib si xa cov duab zoo nkauj. Cov neeg tsim TV saib xyuas qhov tseem ceeb ntawm daim ntawv thov HDR rau 4K Ultra HD TVs tshaj 1080p lossis 720p TVs. Tsis tas yuav tsum xaiv ntawm ob tus qauv.
4K daws teeb meem kuj tseem raug xa mus rau Ultra HD, UHD, 2160p, Ultra High Definition, lossis 4K Ultra High Definition.
Resolution: 4K Yog Tus Qauv
- 4K / UHD TV tus qauv yog 3840 x 2160 pixels. 4K xinesmas tus qauv yog 4096 x 2160 pixels.
- Plaub zaug tus lej pixels li 1080p, uas txhais tau tias plaub lub 1080p duab tuaj yeem haum rau hauv qhov chaw ntawm ib daim duab 4K daws teeb meem.
- Kev daws teeb meem-tsis pom kev, txawm hais tias feem ntau HDR TVs kuj yog 4K TVs.
4K yog hais txog ib qho kev daws teeb meem tshwj xeeb, thiab HDR tsis muaj dab tsi cuam tshuam nrog kev daws teeb meem. Thaum HDR muaj cov qauv kev sib tw, qee qhov qhia qhov tsawg kawg nkaus 4K daws teeb meem, feem ntau cov lus piav qhia txog cov yeeb yaj kiab lossis cov yeeb yaj kiab uas muaj qhov sib txawv ntau dua lossis muaj zog ntau dua li cov ntsiab lus SDR.
Rau cov TV digital, 4K tuaj yeem txhais tau tias yog ib qho ntawm ob qhov kev daws teeb meem. Feem ntau yog Ultra HD lossis UHD hom ntawm 3, 840 kab rov tav pixels los ntawm 2160 ntsug pixels. Qhov kev daws teeb meem tsawg dua, feem ntau tshwj tseg rau xinesmas thiab cov yeeb yaj kiab yeeb yaj kiab, yog 4096 × 2160 pixels.
Txhua 4K daws teeb meem yog plaub npaug ntawm cov pixels (lossis ob zaug ntawm kab) ua 1080p zaub-qhov kev daws teeb meem siab tshaj plaws tom ntej koj yuav pom hauv cov neeg siv khoom siv TV. Qhov ntawd txhais tau hais tias plaub 1080p duab haum rau hauv qhov chaw ntawm ib daim duab 4K daws teeb meem. Nrog rau qhov sib piv ntawm 16: 9, lossis 16 los ntawm 9, tag nrho cov pixels hauv 4K duab tshaj li yim megapixels.
4K (nrog rau txhua qhov kev daws teeb meem hauv TV) tseem nyob tas li tsis hais qhov screen loj npaum li cas. Txawm li cas los xij, tus naj npawb ntawm pixels ib nti (PPI) tuaj yeem sib txawv nyob ntawm qhov loj ntawm lub vijtsam. Qhov no txhais tau hais tias thaum lub vijtsam TV loj tuaj, pixels tau nce hauv qhov loj lossis sib nrug ntxiv kom ua tiav tib qhov kev daws teeb meem.
HDR TVs yuav tsum ua tau raws li cov teeb pom kev zoo, qhov sib piv, thiab cov qauv xim kom suav tias yog HDR. Cov qauv no sib txawv, tab sis tag nrho HDR cov lus txhais tau hais tias muaj qhov muaj zog ntau dua li SDR, nrog rau qhov tsawg kawg nkaus 10-ntsis xim qhov tob. Raws li feem ntau HDR TV yog 4K TVs, feem ntau muaj kev daws teeb meem ntawm 3840 x 2160 pixels (muaj tsawg tsawg ntawm 1080p thiab 720p HDR TVs).
Qee lub LED / LCD HDR TVs muaj qhov tso zis siab tshaj plaws ntawm 1,000 nits lossis ntau dua. Rau OLED TV kom tsim nyog raws li HDR TV, nws yuav tsum tso tawm tsawg kawg 540 nits ntawm lub siab tshaj plaws ci. Feem ntau tshaj tawm ntawm txog 800 nits.
Xim thiab qhov sib txawv: HDR cuam tshuam pom qhov pom
- Raws li kev daws teeb meem, qhov cuam tshuam ntawm 4K hais txog xim yog feem ntau dhau los ntawm kev txhais siab dua.
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ua kom cov xim zoo dua qub thiab sib piv. HDR muaj qhov cuam tshuam pom loj dua li 4K.
- cuam tshuam qhov pom ntau dua li SDR. Cov xim muaj tseeb dua, lub teeb ci dua thiab xim xim, thiab cov duab ntxaws ntxiv.
Kev tsim xim xim txhim kho zoo heev hauv HDR TVs. Raws li kev daws teeb meem, 4K tsis cuam tshuam cov xim tag nrho, dua li muab cov ntsiab lus ntxiv. Qhov no yog vim li cas 4K thiab UHD feem ntau mus tuav tes. Cov thev naus laus zis no ntxiv ob qho tseem ceeb tshaj plaws ntawm cov duab zoo-txhais thiab xim.
Raws li thev naus laus zis, HDR nthuav qhov kev ncua deb ntawm dawb thiab dub. Qhov no ua rau qhov sib txawv hnyav dua yam tsis muaj cov xim ci ntsa iab lossis tsis pom cov xim tsaus.
Thaum cov dluab muaj zog siab ntau npaum li cas, cov ntaub ntawv yog siv tom qab tsim khoom los muab qib cov ntsiab lus thiab tau txais qhov sib txawv loj tshaj plaws. Cov duab tau muab qhab nia los tsim cov xim dav dav, uas ua rau cov xim sib sib zog nqus, ntau cov xim saturated, nrog rau cov shading smoother, thiab cov duab ntxaws dua. Kev muab qhab nia yuav raug siv rau txhua tus ncej lossis qhov chaw, lossis ua cov ntsiab lus zoo li qub rau tag nrho cov yeeb yaj kiab lossis cov haujlwm.
Thaum lub TV HDR pom HDR-encoded cov ntsiab lus, cov xim dawb zoo li tsis tawg lossis ntxuav tawm, thiab cov xim dub tob tsis muaj av nkos lossis crushing. Hauv ib lo lus, cov xim zoo li saturated.
Piv txwv li, hauv qhov chaw hnub poob, koj yuav tsum pom lub teeb ci ntawm lub hnub thiab qhov tsaus ntuj ntawm cov duab nrog qhov pom tseeb zoo sib xws, nrog rau tag nrho cov qib ci nyob nruab nrab. Mus saib qhov piv txwv hauv qab no.
Muaj ob txoj hauv kev rau TV los tso saib HDR:
- HDR Encoded Content: Plaub hom HDR thawj yog HDR10/10+, Dolby Vision, HLG, thiab Technicolor HDR. Lub hom lossis qauv ntawm HDR TV txiav txim siab seb hom twg nws haum rau. Yog tias lub TV tsis tuaj yeem ntes tau HDR hom ntawv, nws qhia cov duab hauv SDR.
- SDR rau HDR ua: Zoo ib yam li TVs nce kev daws teeb meem, HDR TV nrog SDR-rau-HDR kev nce qib ntsuas qhov sib piv thiab cov ntaub ntawv ci ntsa iab ntawm SDR teeb liab. Tom qab ntawd, nws nthuav dav ntau yam dynamic kom kwv yees HDR zoo.
Compatibility: Xaus-rau-kawg rau tag nrho 4K HDR Kev Paub
- Txhua 4K UHD daws teeb meem xav tau 4K-tshaj khoom siv los ntawm qhov chaw los tso saib-xws li lub thawv teeb lossis Blu-duab tshav player, streaming ntaus ntawv, HDMI cable, thiab TV.
- Yuav tsum muaj kev sib haum xeeb kawg-rau-kawg.
- Muaj cov ntsiab lus raug txwv piv rau 4K.
4K TVs xav tau qhov kawg-rau-kawg kev sib raug zoo ntawm txhua yam khoom los tsim qhov tseeb lossis qhov tseeb 4K daws teeb meem. Tib yam yog feem ntau muaj tseeb ntawm HDR. Koj xav tau ob qho tib si HDR TV thiab cov ntsiab lus uas tau tsim siv hom HDR. Los ntawm qee qhov kev ntsuas, muaj cov ntsiab lus tsawg dua hauv HDR dua li muaj nyob hauv 4K, tab sis qhov ntawd pib hloov.
Kom txaus siab rau tag nrho 4K UHD daws teeb meem, koj xav tau 4K-tshaj cov cuab yeej hauv kab. Qhov ntawd suav nrog cov neeg txais kev ua yeeb yam hauv tsev, cov tshaj tawm xov xwm, Ultra HD Blu-duab tshav players, thiab 4K video projectors, nrog rau cov kev daws teeb meem qub ntawm cov ntsiab lus koj tab tom saib. Koj tseem yuav xav tau high-speed HDMI cable. 4K yog ntau dua ntawm cov TV loj dua vim qhov sib txawv ntawm 4K thiab 1080p tsis pom zoo ntawm cov ntxaij vab tshaus me dua 55 ntiv tes. Txawm li cas los xij, cov nyhuv HDR yuav zoo li txawv ntawm TV rau TV, nyob ntawm seb lub teeb pom kev zoo li cas.
Qee 4K cov cuab yeej nce qib kev daws teeb meem qis dua rau 4K, tab sis kev hloov pauv tsis tu ncua. 4K tsis tau ua tiav hauv TV tshaj tawm hauv huab cua hauv Tebchaws Meskas, yog li cov ntsiab lus tshaj tawm huab cua (OTA) yuav tsum tau nce qib kom pom hauv 4K. Ib yam li ntawd, tsis yog txhua lub TV HDR tuaj yeem nce qib ntawm SDR mus rau HDR. Thaum mus yuav lub TV nrog HDR muaj peev xwm, xav txog TV qhov kev sib raug zoo nrog HDR10/10+, Dolby Vision, thiab HLG hom, nrog rau TV lub siab tshaj plaws brightness peev xwm, uas yog ntsuas nyob rau hauv nits.
Qhov zoo npaum li cas HDR-enabled TV qhia HDR nyob ntawm seb lub TV tawm ntau npaum li cas. Qhov no yog hu ua peak brightness thiab ntsuas hauv nits. Cov ntsiab lus encoded nyob rau hauv Dolby Vision HDR hom, piv txwv li, tej zaum yuav muab ib tug ntau yam ntawm 4,000 nits ntawm cov dub tshaj dub thiab dawb tshaj plaws. Ob peb HDR TVs tso tawm lub teeb ntau, tab sis ntau qhov kev nthuav qhia nce mus txog 1,000 nits. Feem ntau HDR TVs tso saib tsawg dua.
OLED TVs max tawm ntawm kwv yees li 800 nits. Ntau tus naj npawb ntawm LED / LCD TVs tso tawm 1,000 nits lossis ntau dua, tab sis cov teeb tsa qis kawg tuaj yeem tso tawm tsuas yog 500 nits (lossis qis dua). Ntawm qhov tod tes, txij li cov pixels hauv OLED TV tau teeb tsa ib tus zuj zus, ua rau cov pixels los tso saib cov xim dub, cov TVs no yuav muaj qhov pom tau ntau dua qhov kev pom zoo txawm tias muaj qhov qis dua qhov ci ntsa iab.
Thaum lub TV pom lub teeb liab HDR tab sis tsis tuaj yeem tso lub teeb txaus los tso saib nws lub peev xwm ua tau zoo, nws siv cov suab lus piav qhia kom phim qhov sib txawv ntawm cov ntsiab lus HDR nrog rau TV lub teeb tso zis.
kab hauv qab
4K thiab HDR tsis yog cov qauv sib tw, yog li koj tsis tas yuav xaiv ntawm ob. Thiab vim hais tias feem ntau cov TVs hwm muaj ob tus qauv, koj tsis tas yuav tsom mus rau ib qho qauv ntawm lwm tus, tshwj xeeb tshaj yog tias koj tab tom yuav lub TV uas loj dua 55 ntiv tes. Yog tias koj xav tau lub TV me dua li qhov ntawd, koj yuav zoo siab nrog 1080p zaub, raws li tej zaum koj yuav tsis pom qhov txawv ntawm qhov kev daws teeb meem.
Cov lus nug nquag
- Puas HDR zoo dua 4K? Qhov koj yuav txaus siab dua nyob ntawm koj yog leej twg thiab koj tus kheej teeb tsa. HDR ua haujlwm hauv cov ntsiab lus ntawm qhov sib piv thiab xim thiab qhov ci, thaum 4K hais txog kev daws teeb meem, uas yog tus lej ntawm pixels hauv ib daim duab.
- Puas HDR zoo dua HD? Ib qho tsis zoo dua li lwm tus, vim HD thiab HDR yog cov ntsiab lus sib cais tag nrho. HD hais txog kev daws teeb meem zoo li 4K ua, thaum HDR ua haujlwm hauv cov ntsiab lus ntawm qhov sib txawv, xim, thiab ci ntsa iab.
- Puas yog HDR txawv ntawm cov xov tooj, koob yees duab, thiab cov lus qhia? Tsis yog, HDR yog HDR, txawm tias koj yuav siv lub koob yees duab HDR los tsim cov ntsiab lus HDR thiab siv HDR zaub rau saib cov ntsiab lus HDR. Koj tuaj yeem ua dab tsi nrog HDR yuav txawv raws li lub cuab yeej, tab sis thev naus laus zis tsis hloov.
- Kuv yuav tsum siv HDR? Nws yog qhov nyiam. Yog tias koj muaj lub koob yees duab HDR lossis lub xov tooj, muaj feem ntau koj yuav xav siv nws. Hauv TV lossis saib, qhov kev siv HDR nws tus kheej zoo npaum li cas yuav txiav txim siab seb koj puas xav siv nws lossis tsis.
