Daim Ntawv Cuam Tshuam Dab Tsi Ua Luam Dua thiab Suab Zoo
Thaum yees duab, yees duab lossis suab paj nruag raug txuag nyob rau hauv digital hom ntawv cov txiaj ntsig tau ua rau cov ntaub ntawv loj heev uas nyuaj rau kev khiav dej num thiab siv ntau lub cim xeeb ntawm lub computer los yog cov tsav nyuaj uas tau txais kev cawmdim. Yog li ntawd, cov ntaub ntawv yog cov sau tawm - los yog ua me dua - los ntawm kev tshem qee cov ntaub ntawv. Qhov no yog hu ua "ntswg" compression.
Cov Teebmeem Ntawm Compression
Feem ntau, txoj kev muab xam (algorithm) yog siv kom cov teebmeem ntawm cov ntaub ntawv ploj yog tsis zoo rau lub qhov muag hauv kev yees duab thiab cov duab, lossis tsis tuaj yeem hnov hauv suab nkauj. Qee yam ntawm cov ntaub ntawv uas pom tau tias ploj yuav siv sijhawm ntawm qhov muag tib neeg qhov tsis muaj peev xwm ua kom muaj qhov sib txawv ntawm cov xim.
Nyob rau hauv lwm yam lus, nrog kev ywj pheej zoo compression, koj yuav tsum tsis muaj peev xwm perceive ib tug poob ntawm daim duab los yog suab zoo. Tab sis, yog tias cov ntaub ntawv yuav tsum tau muab luam tawm kom ua kom ntau me dua nws cov qauv qub, qhov no yuav tsis zoo rau nws, tiam sis nws yeej ua tau cov duab zoo li tsis zoo los yog lub suab nkauj tsis ncaj thiab tsis muaj sia.
Ib lub yeeb yaj duab siab txhais tau ntau heev ntawm kev nco - qee zaum ntau tshaj plaub gigabytes. Yog tias koj xav mus ua si cov yeeb yaj kiab hauv smartphone, koj yuav tsum ua kom tau ib daim ntawv me me los sis nws yuav siv tag nrho cov xov tooj nco. Kev poob ntawm cov ntaub ntawv los ntawm kev yuam kev siab yog tsis pom tshwm rau ntawm plaub-nti screen.
Tab sis, yog tias koj xav kom kwj ntawv cov ntawv xa mus rau Apple TV, Roku Box, los yog cov cuab yeej zoo sib xws , uas yog txuas nrog lub TV loj loj, lub compression yuav tsis tsuas cuab kev, tab sis nws yuav ua rau saib video zoo heev thiab nyuaj rau saib. Cov xim muaj peev xwm saib nris, tsis du. Ntoo tuaj yeem yuav qhov muag plooj thiab zuaj. Tawm zuj zus lossis plhu. Qhov no yog qhov teeb meem nrog kev siv AirPlay los ntawm ib qho iPhone lossis iPad. AirPlay tsis yog los ntawm lub hauv paus xwb. Xwb, nws yog streaming lub playback mus rau hauv lub xov tooj. Thawj kauj ruam ntawm AirPlay feem ntau yog tsim txom rau cov teebmeem ntawm kev yees duab siab video.
Compression kev txiav txim siab - Qhov zoo ntawm qhov chaw txuag chaw
Thaum koj yuav tsum xav txog qhov loj ntawm cov ntaub ntawv, koj yuav tsum tau sib npaug nrog kev tuav cov suab paj nruag, duab los yees duab. Koj tus tsav tsheb los yog cov neeg ua hauj lwm hauv xov xwm qhov chaw yuav raug txwv, tab sis sab nraud cov drives los hauv nqi rau cov kev pabcuam loj dua. Qhov kev xaiv yuav muaj nuj nqis thiab zoo. Koj tuaj yeem tau txais phav phav compressed ntaub ntawv ntawm 500 GB hard drive, tab sis koj xav tau kom muaj ntau pua cov ntaub ntawv zoo.
Koj tuaj yeem tsim cov kev nyiam rau ntau npaum li cas ntawm cov ntaub ntawv xa los yog cov ntaub ntawv ceev tseg. Muaj ntau qhov chaw nyob hauv cov suab paj nruag cov kev kawm xws li iTunes uas tso cai rau koj los laij cov nqi nias rau cov nkauj uas koj ntshuam. Suab paj nruag purists pom zoo kom siab tshaj plaws yog li koj tsis poob ib lub subtleties ntawm cov nkauj - 256 kbps rau lub tso suab ntawm tsawg kawg - HiRes lub suab tawm kom cia ntau me ntsis nqi. Diam duab jpeg yuav tsum muab tso rau qhov siab tshaj qhov loj kom muaj duab zoo. High definition movies yuav tsum tau nyob rau hauv lawv cov keeb kwm kev cawm dim cov qauv zoo li h.264, lossis MPEG-4.
Lub hom phiaj nrog compression yog tau txais cov ntaub ntawv tsawg tshaj plaws uas tsis muaj duab thiab / lossis cov ntaub ntawv suab tau pom. Koj mus tsis tau nrog cov ntaub ntawv loj thiab tsis yooj yim dua yog tias koj khiav tawm ntawm qhov chaw.