Thaum peb saib ib qho kev pab cuam lossis yeeb yaj kiab hauv TV lossis video projection screen, peb xav pom cov duab huv si tsis muaj kev cuam tshuam, thiab tsis muaj khoom cuav. Hmoov tsis zoo, muaj qee lub sijhawm uas tsis tshwm sim. Ob qhov tsis xav tau, tab sis feem ntau, cov khoom qub uas koj tuaj yeem pom hauv koj lub TV lossis qhov kev tshuaj ntsuam xyuas thaum saib yog macroblocking thiab pixelation.
kab hauv qab
Macroblocking yog cov khoom siv yees duab uas cov khoom lossis thaj chaw ntawm cov duab yees duab tshwm los ua los ntawm cov squares me me, tsis yog qhov nthuav dav thiab cov npoo du. Cov blocks yuav tshwm sim thoob plaws hauv daim duab, lossis tsuas yog nyob rau hauv ib feem ntawm daim duab. Qhov ua rau macroblocking muaj feem xyuam rau ib lossis ntau yam hauv qab no: video compression, cov ntaub ntawv hloov ceev, teeb liab cuam tshuam, thiab kev ua yeeb yaj kiab ua haujlwm.
Thaum Macroblocking Pom tau tshaj plaws
Macroblocking yog qhov pom tau zoo tshaj plaws ntawm cable, satellite, thiab internet streaming cov kev pabcuam, vim tias cov kev pabcuam no qee zaum siv ntau cov yeeb yaj kiab compression txhawm rau txhawm rau ntau cov channel hauv lawv cov bandwidth infrastructure. Hais lwm txoj hauv kev, TV tsis tuaj yeem tswj hwm tus nqi ntawm cov ntaub ntawv uas nws tau hais kom ua, yog li nws thaiv cov duab ua ke hauv qhov tsawg saib lossis lub vijtsam laptop. Tom qab ntawd zoom hauv lossis tshuab qhov loj ntawm daim duab. Qhov ntau koj zoom los yog tshuab cov duab, qhov rougher daim duab yuav saib, thiab koj yuav pib pom jagged npoo thiab tsis paub meej. Thaum kawg, koj yuav pib pom tias cov khoom me me thiab cov npoo ntawm cov khoom loj pib zoo li cov khoom me me.
Macroblocking thiab pixelation ntawm cov DVDs kaw
Lwm txoj kev koj yuav ntsib macroblocking lossis pixelation yog nyob rau hauv tsev ua DVD kaw. Yog hais tias koj lub DVD recorder (los yog PC-DVD sau ntawv) tsis muaj ib tug txaus disc sau ceev los yog yog hais tias koj xaiv 4, 6, los yog 8 cov ntaub ntawv hom (uas ua rau kom cov compression siv) kom haum ntau video sij hawm ntawm lub disc, ces lub DVD recorder tej zaum yuav tsis tau txais tus nqi ntawm cov ntaub ntawv video nkag.
Vim li ntawd, koj tuaj yeem xaus nrog ob qho tib si poob qis, pixelation, thiab txawm tias lub sijhawm macroblocking cuam tshuam. Nyob rau hauv cov ntaub ntawv no, txij li thaum lub poob ntas thiab pixelation los yog macroblocking teebmeem tau raug kaw rau lub disc, ces tsis muaj ntxiv video ua rau hauv ib tug DVD player los yog TV yuav tshem tau lawv.
Kev Ncauj Feem Ntau Uas
Macroblocking thiab pixelation yog cov khoom cuav uas tuaj yeem tshwm sim thaum saib cov ntsiab lus video los ntawm ntau qhov chaw. Txij li thaum macroblocking thiab pixelation tuaj yeem tshwm sim los ntawm ib qho ntawm ntau yam, txawm tias koj muaj TV dab tsi, koj tuaj yeem ntsib lawv cov teebmeem ntawm lub sijhawm.
Txawm li cas los xij, kev txhim kho video compression codecs (xws li Mpeg4 thiab H264) thiab ntau cov txheej txheem video ua kom zoo thiab cov neeg nce qib tau txo qis ntawm macroblocking thiab pixelation. Cov kev txhim kho no cuam tshuam rau txhua qhov kev tshaj tawm, suav nrog kev tshaj tawm xov xwm, xov tooj cua, thiab cov kev pabcuam streaming, tab sis qee zaum teeb liab cuam tshuam tsis tau.
Tsis tas li, nws yuav tsum raug sau tseg tias qee zaum macroblocking thiab pixelation tuaj yeem tsim los ntawm lub hom phiaj los ntawm cov neeg tsim cov ntsiab lus lossis cov tshaj tawm, xws li thaum tib neeg lub ntsej muag, daim ntawv tsav tsheb, lub cev ntiag tug, lossis kev txheeb xyuas cov ntaub ntawv yog lub hom phiaj tsis meej pem los ntawm tus muab cov ntsiab lus.
Qhov no qee zaum ua tiav hauv TV tshaj tawm xov xwm, TV yeeb yam tiag tiag, thiab qee qhov kev sib tw kis las uas tib neeg yuav tsis tau tso cai siv lawv cov duab. Nws kuj tseem siv los tiv thaiv cov neeg raug tsim txom los ntawm kev raug txheeb xyuas thaum raug ntes lossis thaiv cov npe cov npe uas cuam tshuam rau tee-shirts lossis kaus mom.
Txawm li cas los xij, sib nrug los ntawm kev siv lub hom phiaj, macroblocking thiab pixelation yog cov khoom tsis zoo uas koj tsis xav pom ntawm koj lub TV screen.
