Saib ntawm qhov kev daws teeb meem
Kev daws teeb meem yog qhov tseem ceeb rau cov khoom siv hluav taws xob, uas sawv cev rau qhov tseeb ntawm qhov screen duab. Cov duab peb pom yog tsim los ntawm pixels. Qhov ntau pixels lub vijtsam hluav taws xob tuaj yeem tso tawm, cov duab ntxaws ntxiv yuav yog thiab cov ntaub ntawv ntau ntxiv yuav tshwm sim.
Lo lus "4K" feem ntau siv hauv TVs ntse hais txog kev daws teeb meem. Tam sim no, cov kev daws teeb meem ntau dua suav nrog HD, Full HD, thiab Ultra HD. Lub TV nrog qhov kev daws teeb meem ntawm 1366 * 768 pixels tuaj yeem hu ua lub TV siab txhais, tab sis nws yog feem ntau siv hauv cov khoom siv hluav taws xob qis, thiab cov TV ntse kuj tsis tshua muaj tam sim no.
Full High Definition (FHD), tseem hu ua 2K TV, muaj kev daws teeb meem ntawm 1920 * 1080 pixels thiab yog ib qho kev daws teeb meem uas feem ntau siv rau nruab nrab-rau-kawg ntse TVs. Ultra HD feem ntau hu ua 4K. Nws qhov kev daws teeb meem nce mus txog 3840 * 2160 pixels, uas yog 4 npaug ntawm tag nrho HD thiab muaj kev nthuav qhia zoo dua.
Tau kawg, nws tsis txhais hais tias tus neeg muag khoom hais tias TV yog 4K lossis nws yog 4K tiag. Koj kuj yuav tsum tau ceev faj ntawm fakes. Raws li tau hais ua ntej, kev daws teeb meem yog tsim los ntawm pixels, thiab pixels yog cov duab liab, ntsuab, thiab xiav xim (RGB matrix); fake 4K ntxiv dawb rau lub hauv paus no los tsim ib qho RGBW plaub-xim hom, ua rau qhov muag plooj xim rendering thiab duab Cov duab nyhuv deteriorates.
Tsis tas li ntawd, ntse TVs xav tau kev txiav txim siab tshaj lij kom nthuav tawm cov duab. Thaum pib ntawm txoj kev loj hlob ntawm cov ntse TVs, feem ntau siv decoding hom yog H.264, tab sis nyob rau hauv lub 4K era, lub encoding hom tau upgraded rau H.265. Yog tias tsis muaj qhov kev txiav txim siab zoo li no, nws tsis txhais tau tias TV yog 4K tiag tiag.
Saib cov xim gamut
Xim gamut kuj yog ib qho tseem ceeb parameter ntawm ntse TVs. Nws sawv cev rau ntau yam xim uas lub vijtsam hluav taws xob tuaj yeem tso saib thiab feem pua nws nyob hauv qee qhov chaw xim. Feem ntau, qhov siab dua cov xim gamut, lub TV lub peev xwm los kho cov xim muaj zog dua, cov xim ntau dua thiab cov khoom muaj tseeb dua thaum saib.
Xim gamut muaj ob txoj kev qhia: sRGB xim gamut tus nqi thiab NTSC xim gamut tus nqi. Feem ntau, peb siv NTSC xim gamut tus nqi raws li tus qauv, uas yog tsim los ntawm American TV Standards Committee. Cov xim gamut ntawm NTSC yog dav dua li ntawm sRGB. Piv txwv li, 90% ntawm sRGB xim gamut tsuas yog sib npaug li 70% ntawm NTSC xim gamut.
Txawm hais tias qhov loj dua xim gamut tus nqi yuav ua rau cov duab hauv TV ntau dua thiab cov xim hloov ntau dua ntuj, cov xim gamut ntau dua tsis zoo dua. Muaj ntau ntau xim nyob rau hauv ib tug siab xim gamut, thiab lub vijtsam muaj peev xwm tswj cov xim yuav tsis tuaj yeem khaws cia. Thaum cov xim tswj tsis raug, cov duab yuav distorted, thiab qhov nce yuav tsis tsim nyog rau qhov poob.
Raws li ib txwm muaj, yog tias lub vijtsam xim gamut ncav cuag 100% sRGB / 72% NTSC lossis siab dua, nws yog lub vijtsam zoo; yog tias nws nce mus txog 90% AdobeRGB / 90% NTSC lossis siab dua, nws yog lub vijtsam zoo heev; Yog tias lub vijtsam xim gamut ntawm lub ntse TV tsuas yog 65% sRGB lossis 45% NTSC, nws raug nquahu kom tsis txhob xaiv nws ntau li ntau tau.
Saib ntawm qhov kho vajtse
Txawm hais tias nws yog kev daws teeb meem lossis xim gamut, lawv yog ob qho tib si sab nraud ntawm cov ntse TVs, thaum kho vajtse yog sab hauv uas txhawb nqa nws txoj haujlwm. Ob leeg yog indispensable. Hardware belongs rau ntau yam, nrog rau qhov peb hu ua chips thiab nco.
Chip
Lub nti yog tus yuam sij rau kev txiav txim siab qhov ua tau zoo thiab cov duab zoo ntawm TV. Raws li kev ua haujlwm ntawm cov ntse TVs dhau los ua ntau thiab nyuaj, cov kev xav tau ntawm kev siv cov nti yuav ua rau siab dua thiab siab dua. Cov yam tseem ceeb uas cuam tshuam rau kev ua haujlwm ntawm lub nti yog tus naj npawb ntawm CPU cores thiab kev ua haujlwm zaus. Tam sim no, cov chips feem ntau siv hauv kev lag luam ntse TV yog Cortex-A53, A57 thiab A73.
Yog tias nws yog cov khoom siv nti xws li Cortex-A7, A9, thiab lwm yam, nws tsuas tuaj yeem tswj tau qee yam smoothness, thiab lags yuav tshwm sim tom qab TV software hloov tshiab. Tau kawg, cov TV ntse hloov pauv sai, thiab cov chips yuav tsum tau hloov kho raws sijhawm. Txhawm rau txiav txim siab qhov zoo ntawm CPU, koj tuaj yeem saib tus lej hauv qab. Tus lej loj dua, qhov khoom tshiab thiab qhov ua tau zoo dua.
Nco
Leej twg tau yuav lub xov tooj ntawm tes yuav paub txog kev nco. Lub cim xeeb ntawm cov ntse TVs yog tib yam li ntawm cov xov tooj ntawm tes, uas tau muab faib ua lub cim xeeb khiav thiab khaws cia. Kev khiav lub cim xeeb cuam tshuam rau kev khiav ceev thiab smoothness ntawm TV system. Lub software uas los nrog lub TV kuj yuav tuav lub cim xeeb khiav. Yog tias siv ntau lub cim xeeb, lags thiab lwm yam tshwm sim yuav tshwm sim.
Lub cim xeeb cia zoo li lub tsev khaws khoom uas cov ntsiab lus khaws cia lossis siv tau raws li qhov xav tau. Feem ntau cached cov ntsiab lus, downloaded daim ntawv thov thiab ua si tau muab tso rau ntawm no. Yog tias koj yuav TV thiab tsuas yog yuav tsum tau saib nws, nws tsis muaj teeb meem yog tias lub cim xeeb me dua. Feem ntau 2G txaus; Yog tias TV xav tau rub tawm daim ntawv thov thiab ua si, koj tuaj yeem xaiv 16G lossis 32G.