Xwb txog txhua leej txhua tus tau tsiv tawm ntawm kev txhais cov ntsiab lus analog TV hauv cov txiaj ntsim ntawm cov kev lag luam siab ntau tshaj plaws hauv lub TV. Lawv muaj 16: 9 piv piv, uas zoo sib xws rau cov yeeb yam yeeb yam saib yeeb yaj kiab, thiab lawv muaj ntau ntau dua cov kev daws teeb meem, uas ua rau lawv pom tseeb, xim, thiab kev nthuav dav. Cov kev daws teeb meem yog tsis txaus ntseeg HDTVs kev muag khoom loj tshaj plaws.
Qhov txawv ntawm qhov kev txiav txim siab yog dab tsi?
Feem ntau, ntau dua qhov kev daws teeb meem ntawm TV, zoo dua daim duab thiab ntau dua tus nqi tag. Yog li, yog tias koj yuav khoom rau lub TV, koj yuav tsum paub tias qhov kev daws teeb meem yog dab tsi thiab koj tau txais dab tsi rau koj cov nyiaj.
Tus nqi hluav taws xob HDTV yog 720p, 1080i thiab 1080p - tus lej yog cov kab uas tsim cov duab, thiab tsab ntawv piav txog hom scan siv los ntawm TV los tso duab: nruj los yog interlaced. Kev daws teeb meem vim hais tias ntau kab txhais tau tias yog ib daim duab zoo dua. Qhov no yog ib lub tswvyim zoo rau cov duab thiab seb dpi txiav txim siab zoo npaum li cas.
- 720p muaj duab daws teeb meem ntawm 1280 pixels los ntawm 720 kab. 720p yog thawj HDTV daws teeb meem. Nws yog tseem muaj tab sis tsis yog nrov li nws ib zaug yog tam sim no hais tias tus nqi tau tuaj rau ntawm 1080 TVs. Los ntawm kev sib piv, lub 720p TV muaj ob zaug daws teeb meem ntawm ib qho duab analog TV.
- 1080i muaj ib qho kev daws teeb meem ntawm 1920 pixels los ntawm 1080 kab rov tav. Txawm li cas los, nws yog interlaced ces cov kab no pleev xim rau ntawm qhov screen hauv ob qho ntawm 540 kab txhua. Daim duab zoo yog zoo rau cov ntsiab lus qeeb-taug tab sis tsis yog txaus nyiam rau cov khoom siv ceev ceev. 1080i yog ib zaug hauv tus txheej txheem hauv HDTVs tab sis tsis muaj ntxiv. Nws zoo tsis zoo dua li 720p TVs.
- 1080p muaj lub daws teeb meem ntawm 1920 los ntawm 1080 pixels, thiab nws yog ib qho scan hnyav, tsis interlaced, yog li nws muab ib daim duab nrog ib tug tag nrho 2.07 lab pixels. Qhov tam sim no yog qhov zoo tshaj plaws uas muag TV thiab nws muab cov duab zoo tshaj plaws ntawm peb yam tau hais ntawm no.
Qhov twg hauv HDTV hom yog zoo dua-720p, 1080i lossis 1080p?
Pom tias tag nrho peb ntawm cov TV hom no yog hauv koj cov nqi ntau, 1080p TV yog qhov zoo tshaj plaws xaiv . Cov 720p thiab 1080i yog cov qub technology uas maj mam muab rau txoj kev yooj yim dua TV. Nws muaj cov kev daws teeb meem zoo tshaj plaws thiab kev pom, thiab muaj ntau 1080p cov ntawv tawm muaj. Txawm li cas los xij, yog tias koj tab tom yuav ib lub TV uas muaj 32 nti los yog me dua, koj yuav tsis pom qhov txawv ntawm cov duab ntawm 1080p thiab 720p televisions.
Lub neej yav tom ntej ntawm High-Definition TVs
Lub tshuab tsis tau sawv ntsug, yog li koj yuav pom lwm cov kev sib tham hauv TV. Cov 4K TVs tam sim no tawm, thiab nws yuav tsis ntev ua ntej cov 8K teev muaj. Tsuas yog nyob ntawm ntug kev siv tshuab ua haujlwm tseem ceeb rau koj - thiab koj muaj cov nyiaj siv dav dav-UHD (ultra high definition) tsis yog qhov zoo tshaj plaws yuav khoom tam sim no vim tias tsis muaj ntau cov ntsiab lus uas yuav siv cov txiaj ntsim zoo tshaj cov tshooj cai.
- 4K UHD : Muaj 4K xov tooj tawm tam sim no, tab sis lawv kim. Cov TV no muaj ib qho kev daws teeb meem ntawm 3840 pixels los ntawm 2160 kab.
- 8K UHD : Ua raws li txoj hlua ntawm 4 k, 8K UHD yuav tsum muaj sai sai no. Tsis muaj cov ntsiab lus tam sim no rau 8K TVs. Lub 8K TVs muab ib qho kev sib tw 7680 pixels los ntawm kab 4320.
Hais txog kev nthuav dav dav
Lwm cov kev txhim kho ntawm HDTVs dhau analog TVs yog qhov dav-npo es tsis pom qhov square screen. Daim duab thaij duab zoo rau peb ob lub qhov muag - peb pom cov duab thaij duab zoo tshaj qhov qub kab hom ntawm analog TV. Peb lub qhov muag pom qhov zoo ntawm sab laug mus rau sab xis los ntawm kev nce saum mus. Lub widescreen kuj qhia ntau ntxiv ntawm kev tshuaj xyuas on-screen, uas zoo rau kev ua si thiab cov yeeb yaj kiab. Txhua HDTVs muaj qhov sib piv thoob plaws hauv lub voj voog, yog li kev txhim kho no tsis xam rau hauv hom ntawv TV zoo dua.