4K, lossis UltraHD yog hais txog chav kawm ntawm cov lus qhia siab thiab yees duab. Lo lus 4K hais txog kab rov tav kev daws teeb meem ntawm daim duab, feem ntau yog 3840 pixels los ntawm 2160 pixels lossis 4096 pixels los ntawm 2160 pixels. Lub peev xwm no yog kwv yees li plaub npaug ntawm qhov kev daws teeb meem ntawm cov qauv HD tam sim no uas sab saum toj ntawm 1920 pixels los ntawm 1080 pixels. Thaum 4K lub khoos phis tawj saib tau dhau los ua qhov qub, ua tiav qhov tseeb UltraHD ntawm txhua lub PC yuav tsum tau hloov kho kho vajtse tseem ceeb.
Cov ntaub ntawv hauv kab lus no siv dav rau hom khoos phis tawj kho vajtse.
Video Bandwidth thiab kev sib txuas ntawm Computers
Computers ntsib teeb meem ua 4K lossis UHD cov ntsiab lus. Cov kev daws teeb meem siab heev yuav tsum muaj qhov loj ntawm bandwidth thiaj li yuav kis tau qhov loj ntawm cov ntaub ntawv video. Cov thev naus laus zis hauv computer qub, xws li VGA thiab DVI, tsis muaj bandwidth thiab yog li tsis tuaj yeem xa cov kev daws teeb meem no tau. Txhawm rau tswj hwm 4K daws teeb meem, koj xav tau cov yeeb yaj kiab txuas tshiab xws li HDMI, DisplayPort, thiab Thunderbolt 2 lossis 3.
Cov khoom siv hluav taws xob feem ntau txhawb HDMI, uas ua rau nws muaj txiaj ntsig zoo rau kev saws los ntawm lub khw muag khoom hauv computer. Yuav tsum muaj daim npav video nrog HDMI chaw nres nkoj, nrog rau HDMI high-speed-rated cables.
Ntau lub khoos phis tawj thiab daim npav video siv DisplayPort thev naus laus zis, txawm hais tias nws tsis tshua paub txog cov neeg siv nruab nrab. Lub DisplayPort v1.2 specification khiav tag nrho 4K UHD video teeb liab mus txog 4096 pixels los ntawm 2160 pixels ntawm 60 ntas ib ob.
kab hauv qab
HDMI cov teeb liab feem ntau xa nrog 30Hz refresh npaum li cas, lossis 30 ntas ib ob. Tus nqi no ua haujlwm rau kev saib cov yeeb yaj kiab hauv TV, tab sis rau cov neeg ua si hauv computer, tus nqi qis qis ua rau qhov muag loj heev. Gamers nyiam 60 fps refresh tus nqi lossis siab dua rau kev txav dej ntau dua ntawm qhov screen.
Video Card Performance
Txhua cov duab ua haujlwm ua haujlwm yooj yim video rendering ntawm 4K UHD cov kev daws teeb meem, tab sis nrawm nrawm 3D video games nthuav tawm hauv 4K xav tau cov duab tseem ceeb ua lub zog. Plaub zaug ntawm kev daws teeb meem ntawm tus qauv siab txhais, plaub zaug tus nqi ntawm cov ntaub ntawv yuav tsum tau ua tiav los ntawm daim npav duab.
Kev ua haujlwm ntawm cov ntawv teev lus no ua rau muaj cua sov hauv lub cev, uas yuav tsum muaj peev xwm ua kom txias dua. Qhov no tag nrho los nrog tus nqi siab dua. Kev khiav ntau lub saib nrog 4K kev daws teeb meem loj heev ua rau qhov kev xav tau ntawm bandwidth thiab ua lub zog.
Video CODECs
Streaming thiab rub tawm 4K cov yeeb yaj kiab nthuav tawm cov kev sib tw ntxiv. Qhov loj me me hauv cov ntaub ntawv kwj yuav tsum tau siv internet ntxiv txawm tias qhov loj me ntawm cov ntaub ntawv video kuj tau nce ntxiv.
Feem ntau cov yeeb yaj kiab siab txhais siv H.264 video codec los ntawm Moving Picture Experts Group, rendering MPEG4 video files. Cov codec no tau ua kom muaj txiaj ntsig zoo ntawm cov ntaub ntawv encoding, tab sis nrog 4K UHD video, Blu-duab tshav disc tuaj yeem tuav tsuas yog ib feem peb ntawm qhov ntev video. Cov tom ntej H.265, los yog High-Efficiency Video Codec, ntxiv txo cov ntaub ntawv ntau thiab tsawg.
Cov khoom siv yees duab qub qub tau raug kho kom siv H.264 yees duab kom ua tau raws li qhov ua tau. Tib yam muaj tseeb rau ntau cov kev daws teeb meem uas pom hauv cov khoom txawb. Qee qhov kev hloov kho uas tsim nyog rau 4K tuaj yeem ua haujlwm los ntawm software, tab sis ntau yam khoom siv qub qub xws li smartphones thiab ntsiav tshuaj yuav tsis tuaj yeem ua si hom video tshiab.
