Ob peb xyoos dhau los, lub sij hawm HDR tau cuam tshuam nrog cov TVs uas muaj qhov siab, thiab niaj hnub no cov yam ntxwv tau pom hauv nruab nrab cov khoom lag luam. Cov tsom kwm tsis muaj kev zam, thiab cov tuam txhab ntau thiab ntau yog suav HDR thev naus laus zis rau hauv lawv cov khoom.
Lub ntsiab ntawm HDR
Muaj lub ntsuas nrog qhov zoo, qhov zoo ntawm kev sib txig sib luag, qhov sib txig sib luag thiab cov xim luam tawm tsis yog lav tias kev ua si thiab cov kev zov me nyuam tuaj yeem siv cov txiaj ntsig no.
Qhov tseeb, dua li ntawm cov ntawv thov tshwj xeeb, cov programmes zoo tib yam tsis tuaj yeem siv lub gamut txuas ntxiv ntawm cov xim uas cov zaub muaj. Tshwj tsis yog tias cov khoom siv qee qhov emulates qhov chaw tsis tshua muaj xim.
Qhov no yog qhov uas HDR suav nrog nws cov metadata kom paub tseeb tias cov xim tu tub tu kiv. HDR TVs lossis cov kuaj xyuas pom pom cov cim tshwj xeeb thiab muab cov kev ua tiav xim raws li cov ntsiab lus tsim tawm tau tso cia hauv lawv cov software.
Dab tsi yog HDR hom
Muaj ntau ntau yam sib txawv HDR tawm los ntawm cov kim thiab xav tau Dolby Vision mus rau ntau yam thiab nrov tshaj HDR10. Thiab tseem tshwj xeeb tshaj lij xws li Advanced HDR los ntawm Technicolor lossis HLG los ntawm BBC thiab YouTube.
Dolby Lub Zeem Muag
Tau kim thiab xav tau ntawm kev kho vajtse HDR hom. Cov zaub yuav tsum muab lub teeb siab kawg ntawm tsawg kawg 10,000 cd / m2 thiab qhov xim xim tob hauv 12 cov khoom. Yuav tsum tau muaj daim ntawv tso cai them nqi los pab lub tshuab Dolby Vision. Hom ntawv muaj ntau qhov kev siv metadata uas kho qhov pom kev ci los ntawm qhov pom mus rau qhov xwm txheej. Yog li ntawd, daim duab no tau ntxim nyiam dua.
HDR10
Cov hom ntawv no tsis tshua xav tau rau hauv txhua qhov muaj nuj nqis nrog rau Dolby Lub Zeem Muag. Lub ncov ntawm lub teeb pom kev zoo yuav tsum yog 4000 cd / m2, thiab qhov xim xim yog lav ntawm 10 cov khoom. Thiab cov kev tau txais txiaj ntsig zoo ntawm cov thev naus laus zis yog qhov uas tsis tas yuav tsum muaj kev txwv daim ntawv tso cai ntawm kev siv hom. Vim tias qhov no, cov ntsiab lus tsim thiab cov chaw tsim khoom lag luam tawm tau ywj pheej thiab qhib qhov pib HDR10.
Cas UltraHD Hwm Nyiaj rau
Lub koom haum tshwj xeeb UltraHD Alliance tau tsim los tswj kev tsim kho thiab siv cov thev naus laus zis uas muaj feem xyuam. Raws li cov kev cai pom zoo, tsawg kawg cov kev cai tsim tawm rau cov lus qhia kom pom cov ntsiab lus HDR yuav tsum tsis muaj kev phem ntau dua li hauv qab no:
- 4K Ultra HD 3840 x 2160 daws teeb meem;
- Txhawb rau 10-ntsis xim, npog tsawg kawg 90% ntawm qhov chaw DCI-P3 xim (125% sRGB, 117% Adobe RGB);
- HDMI 2.0;
- rau cov tso saib LCD. Ncov qhov ci ci tsawg kawg ntawm 1000 qe ntshauv, theem xim dub tsawg kawg 0.05 nits, sib piv sib txawv 20,000: 1;
- rau OLED cov lus. Ncov qhov ci ci tsawg kawg 540 cov qe, dub theem tsawg kawg 0,0005 nits, sib piv sib piv 1,080,000: 1;
Feem ntau cov neeg saib thiab TVs ua tau raws li cov lus sau tseg saum toj no nkaus xwb tsuas pub tsawg. Raws li, lawv ib nrab muab kev txhawb nqa rau HDR hom. Txhawm rau kom ntseeg tau tias cov khoom koj tau yuav khoom txhawb nqa qhov tseeb HDR, koj yuav tsum ua kom ntseeg tau tias koj muaj lub siab zoo UltraHD hwm logo. Lub cim no txhais tau tias cov zaub no tau pom zoo los ntawm UltraHD Alliance.
Sib cais HDR los ntawm VESA
Thaum Lub Kaum Ob Hlis 2017, VESA (Video Electronics Standards Association) txhais cov qauv HDR tshiab. Tseem tshuav tsib pab ntxiv tau pom. Peb rau LED cov lus - DisplayHDR 400, DisplayHDR 500, DisplayHDR 600. Thiab ob qho rau OLED cov lus - DisplayHDR 400 Muaj tseeb dub, DisplayHDR 500 Muaj xim dub.
Raws li qhov cim no, koj tuaj yeem ntseeg tau qhov ua tau zoo los ntawm cov saib tau yuav. Nws yuav tsum nkag siab tias cov khoom siv uas sau tias "HDR" tuaj yeem tsuas yog tau txais lub teeb tsa HDR10 thiab ua raws cov duab pom zoo siv software. Cov tshuaj no tau hu ua "pseudo-HDR" lossis "HDR cuav".
Raws li VESA, DisplayHDR 400 qhov tshwj xeeb yog qhov tsawg tshaj qhov xav tau ntawm kev kho vajtse. Nws muaj lub ncov siab siab thiab qhov dav xim gamut. Piv rau qhov yooj yim HDR10, qhov tshwj xeeb no yog tus cwj pwm kos duab zoo dua. Tab sis ntau ntau nyob ntawm qhov chaw tsim khoom ntawm cov khoom thiab qhov zoo ntawm lub Cheebtsam.
Dab tsi yog saib dimming
Txhawm rau kom pom kev txhim kho cov duab zoo, LED-backlit cov neeg saib xyuas siv cov zaub tsaus muag. Qhov no tso cai rau koj kom ua tiav cov duab tseem ceeb sib xws. Hauv cov khoom siv sib txuas, ua kom tsaus ib feem ntawm daim duab yuav tsaus tag nrho lub vijtsam. Thiab nrog rau kev qhia ntawm HDR cov qauv tshiab, lub zos dimming tau ua tiav hauv kev kho vajtse.
Lub zos dimming yog qhov yuav tsum tau ua vim qhov DisplayHDR 500 tshwj xeeb. Tsis zoo li cov saib yooj yim, ntau tshaj kev ua qauv dim tsuas yog ib feem ntawm daim duab.
Muaj ob hom ntawm lub zos dimming siv nyob rau hauv kho vajtse hauv cov lus qhia. Cov ntug rov teeb ci rau LED teeb thiab tag nrho cov teeb pom kev zoo sab hauv zos (FALD) backlighting.
Cov teeb pom kev teeb pom kev lag luam muaj tsawg dua qhov chaw dim, tab sis tseem tuaj yeem muab cov duab zoo sib xws. Cov tshuab no yog pheej yig dua los siv tshaj li FALD.
FALD tshuab hauv zos tam sim no muab cov duab zoo tshaj plaws thiab cov duab zoo. Cais tawm cov teeb pom kev ntawm LED teeb raug teeb tsa hauv qhov screen matrix. Qhov no tso cai rau koj los tswj lub backlighting thiab dimming nyob rau hauv tej qhov chaw ntawm cov zaub. Cov ntsuas FALD yog kim heev, thiab tsis yog txhua lub tuam txhab saib khoom lag luam muab cov FALD pab kiag li.
HDR hauv PC ua si
Muaj ntau ntau lub PC thiab console ua si tsim los nrog kev txhawb nqa HDR. Ntxiv mus, cov tuam ntxhab ntawm cov kev ua lag luam tau nquag ua tiav cov khoom tso tawm yav dhau los rau hom HDR nrog kev hloov tshiab thiab thaj ua rau thaj.
Txawm li cas los xij, tseem muaj ntau yam kev nyuaj hauv kev siv HDR. Txij li thaum qhov loj ntawm software khoom tsis npaj txhij mus ua haujlwm nrog hom ntawv qib siab. Piv txwv, Windows 10 yuam kev sim hloov kho software rau HDR. Thiab qee kis, kev pom ntawm cov khoom lag luam uas tsis npaj rau qhov no dhau los ua qhov tsis txaus ntseeg. Tom qab ntawd koj yuav tsum hloov tus kheej cov chaw teeb tsa ua ntej txhua lub tso.
Xaus
HDR yog ib qhov kev tsis sib haum xeeb. Muaj nuances uas cuam tshuam rau cov duab kawg zoo. Muaj cov tsom kwm uas muab cov HDR txaus ntshai zoo tab sis muaj lwm yam zoo. Ntawm qhov tsis sib xws, cov ntsuas yoog rau HDR tej zaum yuav muaj cov yam ntxwv tsis muaj zog, tab sis vim yog cov cim HDR dhau los lawv tau nyob hauv ntu nqe siab dua.
Nyob rau hauv txhua rooj plaub, thaum yuav nws nws yog tsim nyog nyeem, saib ntawm kev txheeb xyuas. Sau cov ntaub ntawv ntau li ntau tau thiab xaiv txoj kev xaiv.
