Kev ua yeeb yaj kiab ua tau zoo yog ib qho ntawm cov yuam sij los tso saib cov duab zoo tshaj plaws ntawm HD TVs. Progressive scan yog cov txheej txheem ua tiav uas tau nthuav dav thiab tseem siv los ua lub hauv paus ntawm cov txheej txheem ua yeeb yaj kiab niaj hnub rau cov qauv zoo li Blu-duab tshav discs.
Los ntawm Interlaced rau Kev Tshawb Fawb Txog Kev Tshawb Fawb
Nrog rau qhov tshwm sim ntawm lub khoos phis tawj desktop, nws tau tshawb pom tias kev siv TV ib txwm siv rau cov duab hauv computer tsis tau txais txiaj ntsig zoo, tshwj xeeb nrog cov ntawv nyeem. Qhov no yog vim qhov cuam tshuam ntawm interlaced scanning. Txhawm rau tsim txoj hauv kev meej dua ntawm kev nthuav tawm cov duab ntawm lub khoos phis tawj saib, kev siv thev naus laus zis thev naus laus zis tau tsim.
Dab tsi yog kev sib cuam tshuam scan?
Tsev analog TV tshaj tawm (nrog rau cov laus cable / satellite thawv, VCRs, thiab DVDs) tau tso tawm rau ntawm lub vijtsam TV uas siv lub tshuab hu ua interlaced scanning. Muaj ob lub ntsiab interlaced scan tshuab siv: NTSC thiab PAL.
NTSC yog raws li qhov system ntawm 525-kab, 60 teb, thiab 30 ntas-ib-thib ob (fps) ntawm 60Hz. Txhua tus ncej tau muab faib ua ob ntu ntawm 262 kab. Cov kab raug xa mus ua ke thiab tom qab ntawd tso tawm raws li cov duab sib cuam tshuam. Lub teb chaws uas siv NTSC suav nrog Asmeskas, Canada, Mexico, qee qhov chaw ntawm Central thiab South America, Nyiv, Taiwan, thiab Kauslim Teb.
PAL yog raws li qhov system ntawm 625 kab, 50 teb, thiab 25fps ntawm 50Hz. Zoo li NTSC, lub teeb liab yog interlaced rau hauv ob lub teb muaj li ntawm 312 kab txhua. PAL muaj tus ncej tus nqi ze dua rau cov yeeb yaj kiab (cov ntsiab lus zaj duab xis yog raws li tus ncej tus nqi ntawm 24fps). Lub teb chaws uas siv PAL system suav nrog U. K., Lub teb chaws Yelemees, Spain, Portugal, Ltalis, Tuam Tshoj, Is Nrias teb, feem ntau ntawm Africa, thiab Middle East.
kab hauv qab
Kev ntsuas qib siab txawv ntawm kev sib cuam tshuam scan nyob rau hauv uas cov duab tso tawm rau ntawm lub vijtsam los ntawm kev tshuaj xyuas txhua kab (lossis kab ntawm pixels) hauv kev txiav txim los ntawm sab saum toj mus rau hauv qab. Los ntawm kev txheeb xyuas cov duab mus rau ib qho screen hauv ib qho cheb (tshwj tsis yog tsim cov duab los ntawm kev sib txuas ob lub halves), cov duab smoother, cov ncauj lus kom ntxaws ntxiv tuaj yeem tshwm sim uas zoo dua rau kev saib cov ntawv thiab cov lus tsa suab. Kev soj ntsuam kev vam meej kuj tsis tshua muaj kev cuam tshuam rau flicker.
Kab ob
Nrog rau qhov tshwm sim ntawm lub siab txhais LCD TVs thiab video projectors, qhov kev daws teeb meem uas tsim los ntawm ib txwm TV, VCR, thiab DVD qhov chaw tsis tau tsim dua zoo heev los ntawm kev sib cuam tshuam scanning. Txhawm rau kom them nyiaj, ntxiv rau kev soj ntsuam kev vam meej, cov neeg tsim TV kuj tau qhia txog lub tswv yim ntawm kab ob npaug.
A TV nrog kab ob npaug tsim "kab ntawm kab", uas muab cov yam ntxwv ntawm kab saum toj no nrog cov kab hauv qab no txhawm rau muab cov duab zoo dua. Cov kab tshiab no tau ntxiv rau cov qauv kab thawj, thiab tag nrho cov kab yuav raug tshuaj ntsuam xyuas ntawm lub vijtsam TV.
Qhov teeb meem ntawm kab ob npaug yog tias nws tuaj yeem ua rau cov khoom siv dag zog vim tias cov kab uas tau tsim tshiab kuj yuav tsum tau txav mus rau qhov kev txiav txim hauv daim duab. Txhawm rau kom ua tiav cov duab, kev ua yeeb yaj kiab ntxiv feem ntau yog ua haujlwm.
Hloov zaj duab xis rau Video
Txawm hais tias muaj kev vam meej scan thiab kab ob zaug sim los daws qhov teeb meem ntawm cov duab sib cuam tshuam ntawm cov duab video, tseem muaj lwm qhov teeb meem tiv thaiv qhov tseeb ntawm cov yeeb yaj kiab thaum xub thawj tua ntawm zaj duab xis: video ncej npaum li cas. Rau PAL-raws li cov khoom siv thiab TVs, qhov no tsis yog qhov teeb meem loj vim tias PAL ncej tus nqi (25fps) thiab zaj duab xis tus nqi (24fps) yog ze heev, yog li yuav tsum tau kho me me rau kev qhia zaj duab xis kom raug ntawm PAL TV screen.
Txawm li cas los xij, qhov ntawd tsis yog qhov teeb meem nrog NTSC raws li nws tsim thiab tso tawm video ntawm 30fps. Yog tias koj tau sim hloov cov yeeb yaj kiab hauv tsev 8 hli los ntawm kev kaw cov yeeb yaj kiab uas siv lub camcorder, koj yuav pom qhov teeb meem no. Txij li thaum tus ncej txav tsis sib xws, qhov no ua rau pom kev flicker thaum cov yeeb yaj kiab raug xa mus rau video yam tsis muaj kev hloov kho.
Thaum cov yeeb yaj kiab raug xa mus rau DVD (lossis videotape) hauv NTSC-based system, qhov sib txawv ntawm cov yeeb yaj kiab thiab cov yeeb yaj kiab yuav tsum sib haum. Txhawm rau tshem tawm cov flicker, zaj duab xis tus nqi yog "txhaj" los ntawm cov qauv uas zoo sib xws rau cov yeeb yaj kiab tus nqi rau tus nqi video.
Progressive Scan thiab 3:2 Pulldown
Yuav kom pom cov yeeb yaj kiab hauv nws lub xeev qhov tseeb tshaj plaws, nws yuav tsum tau tso tawm ntawm 24 thav duab-ib-ob thib ob siv lub projector lossis TV uas tuaj yeem tso saib tus ncej tus nqi ib txwm muaj. Txhawm rau ua qhov no hauv NTSC-based system, lub hauv paus yuav tsum muaj 3: 2 rubdown nrhiav kom pom. Txoj kev ntawd, nws tuaj yeem thim rov qab cov txheej txheem 3: 2 rub tawm kom hloov cov yees duab los ntawm zaj duab xis kom nws tuaj yeem tso tawm rau hauv nws thawj 24fps hom ntawv nrog kev nce qib scan.
Qhov no yog ua tiav los ntawm DVD (lossis Blu-duab tshav / Ultra HD Blu-duab tshav) player nruab nrog hom tshwj xeeb ntawm MPEG decoder, ua ke nrog lub deinterlacer uas nyeem 3: 2 rub down interlaced video teeb liab tawm ntawm lub DVD thiab rho tawm cov yeeb yaj kiab kom zoo los ntawm cov thav duab video. Cov thav duab tom qab ntawd tau nce qib scanned, kho cov khoom siv kho kom raug, thiab cov teeb liab video tshiab raug xa tawm los ntawm kev ua kom zoo dua scan-enabled tivthaiv yees duab lossis HDMI kev sib txuas rau TV lossis video projector.
Yog tias koj lub DVD player tau nce qib scan tsis muaj 3: 2 rubdown nrhiav pom, nws tseem yuav xa cov duab zoo dua li cov yees duab sib txuas. Tus neeg uas ua ntawv yuav nyeem cov duab sib cuam tshuam ntawm DVD, ua cov duab zoo ntawm lub teeb liab, thiab dhau mus rau TV lossis video projector hauv 30fps system.
Yuav Ua Li Cas Koj Yuav Tsum Tau Nkag Mus Nkag Siab
Ob lub hauv paus (DVD player, HD cable, satellite box, kav hlau txais xov, thiab lwm yam) thiab TV lossis video projector yuav tsum ua kom muaj peev xwm scan. Lub hauv paus tseem xav tau kom muaj kev nce qib scan-enabled tivthaiv video tso zis, lossis DVI lossis HDMI tso zis uas tso cai rau kev hloov pauv ntawm cov duab scan loj.
Yog tias ib daim vis dis aus muab tso rau hauv DVD hauv daim ntawv sib cuam tshuam, kev luam theej duab tuaj yeem siv tau los ntawm DVD player ua ib qho ntawm nws cov kev xaiv playback. Composite thiab S-Video kev sib txuas tsis hloov pauv cov duab scan video.
