Yuav ua li cas xaiv lub DVR rau lub tsheb: tshuaj xyuas thiab yeeb yaj duab
DVRs tau ntev tau siv los ntawm ntau tus neeg tsav tsheb, cov cuab yeej no tau dhau los ua tus cwj pwm tseem ceeb hauv chav tsev. Ua tsaug rau nws, koj tuaj yeem sau txhua yam uas tshwm sim rau koj thaum tsav tsheb, thiab thaum muaj kev sib tsoo tsheb, koj tuaj yeem ua pov thawj koj qhov tsis muaj txim. Yog tias koj mus rau ib lub khw lossis mus ntsib lub khw hauv online, koj yuav pom ntau yam ntawm cov khoom siv no, uas txawv ntawm ib leeg ntawm lawv cov nqi thiab lawv cov yam ntxwv.
Yuav ua li cas xaiv ib tug zoo DVR rau ib lub tsheb, dab tsi yam ntxwv kuv yuav tsum tau them tshwj xeeb mloog mus rau? Peb twb tau hais txog cov ncauj lus no ntawm peb lub vev xaib Vodi.su, piav qhia cov qauv nrov ntawm cov neeg sau npe hauv xyoo 2015.
Hauv qhov tseem ceeb, DVR yog lub koob yees duab me me rau ntawm lub tshuab cua, tab sis nyob rau hauv xyoo tas los no kev ua haujlwm tau nthuav dav, thiab cov ntaubntawv povthawj siv tau zoo dua qub, thiab qhov no tsis yog qhov xav tsis thoob - saib seb lub xov tooj ntawm tes tau dhau los hauv 10 xyoo - los ntawm loj heev. monoblocks nrog cov kav hlau txais xov thiab muaj peev xwm txwv, mus rau ultra-nyias smartphones, uas yog tag nrho-fledged mini computers.
Tib yam tshwm sim nrog cov kaw video. Txawm li cas los xij, puas yog tag nrho cov haujlwm no xav tau hauv lub neej tiag? Cia peb xav txog ntau yam ntxiv.
Cov ntaubntawv povthawj zoo yog qhov tseem ceeb parameter.
Cov qauv hauv qab no yog tam sim no siv:
- VGA - 640x480 pixels, ib hom ntawv dhau los, hauv daim duab zoo li no koj tuaj yeem pom txoj kev, tsheb nyob rau hauv pem hauv ntej, txoj kev taug kev, tab sis koj tsis tuaj yeem paub qhov txawv ntawm txhua yam kom ntxaws: koj tsis zoo li yuav txiav txim siab tus lej, txawm tias cov qauv ntawm lwm lub tsheb, Dhau li ntawm cov xim yog noticeably distorted;
- HD - kev daws teeb meem siab 1280x720 pixels, cov ntaubntawv povthawj siv tau zoo dua ob peb zaug, cov yeeb yaj kiab zoo li no tuaj yeem pom ntawm lub vijtsam loj, txawm hais tias cov ntsiab lus me me - cov lej tsheb - tsuas yog nyeem tau ntawm qhov ze, graininess kuj tseem nyob;
- Full-HD - 1920x1080 pixels - daim duab zoo heev, koj tuaj yeem pom yuav luag tag nrho cov ntsiab lus, mus txog rau cov lej tsheb uas tsis nyob deb heev;
- Super-HD - 2304 × 1296 - qhov kev daws teeb meem zoo tshaj plaws tam sim no, cov yeeb yaj kiab zoo li no tuaj yeem pom ntawm lub vijtsam TV loj, qhov zoo yuav txaus siab rau koj, yuav luag tag nrho cov ntsiab lus tsim nyog yuav pom rau koj: cov lej, cov paib thiab cov paib, neeg lub ntsej muag thiab hais txog.
Ntawd yog, yog tias koj xav kom tus neeg sau npe ua nws txoj haujlwm tseem ceeb, xaiv los ntawm ob hom ntawv kawg.
Txawm li cas los xij, kev daws teeb meem tsuas yog ib qho ntawm cov yam ntxwv uas cuam tshuam rau qhov zoo ntawm cov ntaub ntawv; xws li qhov ntsuas qhov ceev yog qhov tseem ceeb sib npaug, nws ntsuas hauv thav ntawv ib ob. Los ntawm cov qauv niaj hnub no, cov ntaub ntawv ceev yuav tsum yog tsawg kawg 25 thav duab ib ob, muaj cov qauv siab dua uas tuaj yeem ua 30 ntas ib ob.
Qhov zoo ntawm cov yees duab zoo, qhov ntau qhov chaw nws siv rau ntawm daim npav nco. Kuj tseem muaj cov qauv uas koj tuaj yeem xaiv qhov ceev ceev, piv txwv li, yog tias daim npav nco tau tsim rau 8 lossis 16 GB, ces nws yog qhov zoo dua los xaiv qhov qis qis, txawm hais tias feem ntau video recorders ntawm nruab nrab thiab siab dua cov nqi sib txawv tuaj yeem. txhawb daim npav ntawm 36, 64 thiab txawm 128 lossis 256 Gigabyte.
Txhawm rau kom haum cov ntaub ntawv ntau ntxiv ntawm daim npav nco, koj yuav tsum xaiv tus neeg sau npe zoo raws li cov ntaub ntawv compression txoj kev (encoder, codec, decoder).
Cov ntaub ntawv compression hom:
- MJPEG - ib hom ntawv tsis tu ncua raws li cov ncej-los ntawm-thav duab compression, xws li cov yeeb yaj kiab siv ntau qhov chaw, lub suab tau txais kev cawmdim;
- MPEG4 - ib txhij compression ntawm lub suab thiab video ntws, video yuav siv sij hawm li 10 lub sij hawm tsawg qhov chaw;
- H.264 yog hom kev tshaj lij tshaj plaws, nws yuav siv sij hawm ib nrab ntawm qhov chaw tshaj li qhov dhau los, thiab ntxiv rau, muaj cov xim zoo dua thiab lub suab tsim tawm.
Muaj cov tawm tswv yim zoo li MOV los yog AVI, cov ntaub ntawv video nyob rau hauv ib daim ntawv tais ceev tseg rau hauv cov hom ntawv yog cim zoo li no: video.mov lossis video.avi. Kuj tseem muaj cov qauv tshwj xeeb uas siv los ntawm cov neeg tsim khoom lag luam. VisionDrive hom, uas yog tsim tshwj xeeb rau kev kaw cov yeeb yaj kiab ntawm kev txav mus los, qhia nws tus kheej zoo. Txhawm rau ua si nws, koj yuav tsum rub tawm qhov tshwj xeeb media player program rau koj lub computer.
Lwm qhov tseem ceeb yog lub hmo ntuj. Hauv txoj cai, hmo ntuj hom yog qhov teeb meem ntawm txhua tus neeg sau npe. Ntawm illuminated nroog txoj kev loj, cov vis dis aus tawm ntau dua lossis tsawg dua ntawm qhov zoo, tab sis sab nraum lub nroog, qhov twg txoj kev feem ntau tsis pom, nws nyuaj heev kom pom dab tsi. Txhawm rau kho qhov teeb meem no, ntau lub tuam txhab teeb tsa infrared illumination, tab sis los ntawm peb tus kheej kev paub peb yuav hais tias nws tsis siv.
Zoo, lwm qhov tseem ceeb heev parameter yog lub kaum sab xis saib. Lub kaum sab xis feem ntau ntsuas diagonally thiab tuaj yeem nyob ntawm 60 txog 170 degrees. Peb yuav hu rau qhov pom qhov sib txawv - 90-140 degrees. Nws yog lub kaum sab xis no uas yuav tso cai rau peb los txiav txim siab cov neeg nyob sib ze. Yog hais tias lub kaum sab xis yog nqaim dhau, ces koj yuav tsis pom, piv txwv li, tsheb nyob rau hauv cov kab nyob sib ze, tab sis yog tias lub kaum sab xis siab tshaj 140 degrees, ces cov duab yog distorted heev vim cov nyhuv fisheye.
Mounting txoj kev, lub peev xwm tig 180 degrees - muaj cov neeg sau npe uas tuaj yeem ua kom muaj kev nyab xeeb nyob rau hauv cov lus qhia sib txawv los sau kev sib tham nrog tub ceev xwm soj ntsuam. Kuj tseem muaj cov uas tau nruj nreem rau ntawm lub tripod.
Cov lus tsa suab sensor yog qhov muaj txiaj ntsig zoo, lub kaw lus cia li sawv los ntawm kev pw tsaug zog sai li sai tau thaum pom txhua qhov txav ntawm qhov pom.
G-Sensor los yog poob siab sensor - ib qho tshwj xeeb uas tsis yog-tshem tawm tau muab faib rau ntawm daim npav nco, uas tau khaws cov vis dis aus thaum muaj xwm txheej ceev. Piv txwv li, yog tias koj raug ntaus los ntawm tom qab, los yog koj raug yuam kom nres nyuaj, cov yees duab yuav tau txais kev cawmdim nyob rau hauv daim nplaub tshev no thiab yuav tsis raug deleted thaum lub voj kaw.
GPS yog ib qho tseem ceeb ntxiv. Cov vis dis aus kaw qhov nrawm ntawm kev txav thiab hnub tam sim no. Thiab tom qab ntawd, thaum saib cov vis dis aus hauv computer, koj tuaj yeem txuas nws nrog Google maps, thiab qhov nrawm ntawm kev txav yuav tshwm sim ntawm txhua ntu.
Ua tib zoo saib xyuas qhov loj ntawm cov zaub, roj teeb muaj peev xwm, yees duab muaj nuj nqi, nyiaj tshuav dawb, lim (tsim tawm hluav taws xob tsis tsim nyog).
Ib tug ntau dua los yog tsawg dua ib txwm video recorder yuav raug nqi tsawg kawg yog 4 txhiab rubles.
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