Qhov Tseem Ceeb - HD vs UHD TV
HD TV sawv cev rau High Definition TV thiab UHD TV sawv rau Ultra-High Definition TV. Qhov sib txawv tseem ceeb ntawm HD thiab UHD TV yog tias, nrog UHD TV, nws tuaj yeem saib cov yeeb yaj kiab uas muaj kev daws teeb meem ntau dua (piv txwv li lawv cov duab yuav ua tau ntau dua).
HD TV yog dab tsi?
HD TVs muaj ntau qhov kev daws teeb meem ntau dua li lawv cov neeg ua ntej, SD TVs ("Standard Definition TV"). Cov yeeb yaj kiab hauv TV tau tso tawm ua cov duab, nrog rau txhua daim duab uas muaj cov kab sib chaws ntawm ntau pixels. Cov yees duab daws teeb meem siab dua yog ib qho nrog ntau tus pixels siv los ua txhua tus ncej, ua rau cov duab ntau dua. Kev daws teeb meem feem ntau yog qhia raws li tus lej ntawm pixels hauv kab × tus lej ntawm pixels hauv kab. Tus naj npawb ntawm pixels nyob rau hauv kab feem ntau tau siv los qhia qhov kev daws teeb meem ntawm lub TV, nrog rau qhov sib piv, uas yog hais txog qhov sib piv ntawm cov pixels hauv ib kab (ib kab ntsug ntawm pixels): pes tsawg pixels hauv ib kab. kab (kab rov tav array ntawm pixels).
HD TVs feem ntau muaj qhov sib piv ntawm 16: 9. Ib feem ntau "zoo" HD TV muaj hom video ntawm 1080p; piv txwv li, nws muaj 1080 pixels hauv txhua kab ntawm pixels. Ntawm no, tsab ntawv "p" yog hais txog yuav ua li cas cov duab ntawm qhov screen tau rov kho dua. Nyob rau hauv rooj plaub no, p stands rau progressive scan, uas txhais tau tias cov pixels yog refreshed ib kab tom qab lwm yam. Qhov no muab kev pom zoo dua li lub TV nrog video hom 1080i, uas muaj qhov sib cuam tshuam scanning system. Ntawm no, ib nrab ntawm cov pixels tau kho dua tshiab ib zaug, thiab ib nrab yog rov kho dua tom qab.
UHD TV yog dab tsi?
A UHD TV muaj kev daws teeb meem ntau dua li HD TV. Feem ntau, UHD TV kuj muaj qhov sib piv ntawm 16: 9. Muaj ob lub ntsiab ntawm UHD TV: 4k UHD TV, nrog cov duab ntawm 3840 × 2160p thiab 8k UHD TV, nrog cov duab ntawm 7680 × 4320p. Qhov "4k" ntawm no yog hais txog qhov tseeb tias muaj ze li ntawm 4000 pixels ua txhua kab. Nco ntsoov tias txhawm rau ua tus yam ntxwv ntawm UHD TVs, tus naj npawb ntawm pixels hauv kab yog siv, ntau dua li cov pixels hauv ib kem, xws li SD TV thiab HD TV.
Samsung Curved UHDTV
Qhov txawv ntawm HD thiab UHD TV yog dab tsi?
Plus ntsiab lus UHD TV tshaj HD TV
Pixel ceev
Los ntawm cov kev daws teeb meem, nws pom tseeb tias 4k UHD TV muaj nyob ib ncig ntawm 8 lab pixels tag nrho, qhov 1080p HD TV muaj txog 2 lab. Yog tias qhov loj ntawm cov ntxaij vab tshaus zoo sib xws, qhov no txhais tau hais tias qhov pixel ceev ntawm 4k UHD TV yog li plaub npaug siab dua 1080p HD TV. 8k UHD TV muaj txog 33 lab pixels, ua rau lawv muaj plaub npaug ntau pixels dua li 4k UHD TVs. Cov duab hauv qab no qhia txog kev sib piv ntawm cov kev daws teeb meem sib txawv ntawm cov ntxaij vab tshaus sib txawv, nrog rau thaj tsam uas sawv cev rau tag nrho cov pixels.
Image Quality
Qhov siab dua pixel ceev hauv UHD TVs pab nthuav tawm cov ntsiab lus ntxiv ntawm cov duab ntawm lub vijtsam, ua rau lawv zoo dua. Qhov no kuj txhais tau hais tias cov duab ntse dua tuaj yeem pom txawm tias nyob deb ntawm qhov screen TV. Tsis tas li ntawd, ib tus tuaj yeem tau los ze zog rau UHD TV npo yam tsis tas yuav pom tus kheej pixels.
Flipside ntawm UHD TV tshaj HD TV
Cov Ntaub Ntawv Loj thiab Hloov Cov Ntaub Ntawv
Ib qho ntawm qhov flipsides ntawm UHD TV yog tias cov duab zoo dua tuaj nrog qhov loj dua. Tsis tsuas yog khaws cia ntawm UHD TV cov ntsiab lus siv ntau qhov chaw, tab sis txhawm rau hloov cov ntaub ntawv nrog tus ncej siab, bandwidth ntawm kev sib txuas kuj yuav tsum siab dua. Piv txwv li, HDMI 1.4 cables tsuas tuaj yeem hloov 4k UHD TV yeeb yaj duab ntawm tus nqi ntawm 30 thav duab ib ob. Qhov hloov kho dua tshiab, HDMI 2.0, txhawb kev hloov pauv mus txog 60 ntas ib ob.
Price
Ib qho tsis zoo rau UHD TVs yog tias lawv kim dua li lawv cov HDTV counterparts. Thaum 50 nti HDTV feem ntau raug nqi txog US $ 500, 4k UHD TVs feem ntau yuav raug nqi txog US $ 1000.
Txawm li cas los xij, nws yog qhov kev zam tsis dhau UHD TV thev naus laus zis thaum kawg yuav ntes tau, zoo li HDTV tau dhau los ntawm SDTV ib txwm muaj. Thaum kawg, cov ntsiab lus feem ntau yuav tshaj tawm hauv UHD TV, ua rau HDTVs tsis sib xws.
