DVRs rau lub tsev yog nyob rau hauv qeb ntawm cov khoom siv uas sau thiab ua cov cim qhia los ntawm kev ruaj ntseg. Lawv tsim nyog rau kev tshaj tawm cov duab ntawm lub monitor, khaws cov ntaub ntawv thiab xa lawv mus rau lub network hauv zos. Cov cuab yeej zoo li no yog lub ntsiab lus tseem ceeb ntawm kev soj ntsuam video thiab cuam tshuam ncaj qha rau kev ua haujlwm ntawm tag nrho cov kab ke.
Purpose
Sab nraum zoov zais vis dis aus rau lub tsev ceeb toom rau cov tswv ntawm kev cuam tshuam ntawm thaj chaw vim tias muaj peev xwm kho txhua qhov txav. Tsis tas li ntawd, lawv pab tiv thaiv tub sab hauv tsev.
Yog li, koj tuaj yeem taug qab kev ua haujlwm ntawm cov neeg ua haujlwm ntawm lub xaib, tsis hais koj qhov chaw nyob. Cov txheej txheem soj ntsuam tso cai rau koj los daws ntau qhov teeb meem tsis sib haum xeeb, piv txwv li, txheeb xyuas tus neeg uas tau ua txhaum cai, lossis sau cov txheej txheem tsim ntau yam khoom hauv thaj chaw.
Views
Hidden DVRsrau lub tsev tau muab faib ua ob peb hom:
- Mixed yog cov khoom siv ntau yam uas muaj peev xwm kaw, txuag, tshaj tawm thiab ua cov ntaub ntawv los ntawm ntau lub koob yees duab. Lawv tuaj yeem ntsia tau rau hauv txhua qhov chaw yooj yim, qhov tsuas yog qhov tsis zoo yog tus nqi siab heev.
- Network khaws cov vis dis aus uas xa mus rau lawv los ntawm cov khoom siv digital. Lawv tau npaj rau kev teeb tsa hauv ib lub tsev thiab muaj kev ua haujlwm tsawg.
- Digital video recorder ntawm ib lub tsev ntiag tug muab kaw, saib thiab txuag cov ntaub ntawv hauv hom video. Nws yog siv rau hauv cov khoom siv analog, muaj cov npe txuas ntxiv ntawm cov yam ntxwv, cov ntaub ntawv zoo heev, thiab nws qhov kev yuav khoom muaj nqis rau txhua tus.
- Tsheb recorders yog rau kaw thiab saib cov duab video nkaus xwb. Lawv tsau rau hauv lub tsheb ntawm lub qhov cua.
Txhua yam khoom siv, raws li lub npe qhia, muab kev soj ntsuam ntawm thaj chaw ib puag ncig thiab sau txhua yam uas tshwm sim. Raws li kev ruaj ntseg systems, cov khoom siv wireless tau dhau los ua ntau tshaj plaws.
txiaj ntsig
Koj xav tau DVR dab tsi ntxiv? Lub koob yees duab rau lub tsev kuj tseem siv tau thaum tsim nyog los saib xyuas qhov chaw nres tsheb, chaw nres tsheb sib koom ua ke, warehouses thiab cov khoom ntiag tug. Cov cuab yeej nruab nrog lub suab sensors thiab siv sab nraum zoov muaj ntau yam haujlwm uas tsis muaj nyob hauv cov khoom siv,ntsia hauv tsheb:
- Sau txhua qhov txav. Tus tsim muaj xws li ib tug infrared receiver uas teb rau txhua lub suab thiab txav nyob rau hauv kev pab them nqi.
- Lub xub ntiag ntawm daim npav nco ua kom cov ntaub ntawv khaws cia ntev. Nyob rau tib lub sijhawm, nws tuaj yeem yuav daim npav nrog lub peev xwm kaw ntau.
- Tus kheej-nrho cov ntaub ntawv. Yog tias tsis muaj qhov chaw pub dawb ntawm daim npav, kev tua yuav txuas ntxiv tom qab thawj cov ntaubntawv povthawj siv tau raug rho tawm.
- Kev tiv thaiv los ntawm qhov tsis zoo ntawm ib puag ncig. Lub xub ntiag ntawm ib rooj plaub tshwj xeeb tiv thaiv kom tsis txhob ya raws thiab plua plav nkag mus rau hauv cov khoom sab hauv.
- Kev kaw tsis cuam tshuam los ntawm teeb pom kev zoo thiab lwm yam. Qhov zoo ntawm kev tua tseem siab thiab meej txhua lub sijhawm ntawm hnub.
- Txuas rau lub computer lossis TV.
- Muaj peev xwm saib cov ntaub ntawv kaw nyob rau lub sijhawm tshwj xeeb.
- Khoom siv nrog cov chaw taws teeb tswj tso cai rau koj los kho cov haujlwm ua haujlwm ntawm qhov deb.
Ntse
Txhua qhov kev txav mus los hauv tsev DVR muaj cov lus qhia hauv qab no:
- Frame size.
- Triggered by txav.
- Xaiv txoj kev compression.
- Ntau qhov txuas rau ntau hom koob yees duab.
Lub cuab yeej tuaj yeem txuas rau ntau lub koob yees duab tib lub sijhawm, kom tag nrho thaj chaw ib puag ncig tswj hwm, thiab tsis tas yuav yuav khoom siv ntxiv.
Formats
Muaj ntau ntau hom compression yooj yim niaj hnub no. Ntawm lawvsuav nrog cov hauv qab no: H.264, MPEG4 thiab MJPEG. Qhov kev xaiv tom kawg tau dhau los ua tsis tshua muaj tom qab qhov tshwm sim ntawm ntau txoj hauv kev niaj hnub. Ib tug yam ntxwv feature yog siv ceev ceev ntawm qhov chaw dawb disk vim qhov tseeb tias cov ntaub ntawv tau txais kev cawmdim los ntawm encoding. Hom ntawv nrov tshaj plaws yog MPEG4, uas hla cov thav ntawv zoo ib yam, ua rau cov ntaub ntawv khaws cia thiab txuag chaw rau cov ntaub ntawv tom qab. H.264 yog lub xeev-ntawm-tus-kos duab compression txoj kev uas muab cov duab siab txhais nrog nplua nuj xim. Tsis tas li ntawd, cov ntaub ntawv kaw tseg yuav tsum muaj qhov chaw dawb tsawg dua.
DVR rau 4 lub koob yees duab rau hauv tsev, nruab nrog lub zog tshawb nrhiav, tig rau ntawm qhov kev txav me ntsis hauv thaj chaw them nyiaj, thaum hloov lub sijhawm tua yog ua tau. Qhov kev daws teeb meem zoo tshaj plaws yog 720 x 526 pixels. Cov ntaub ntawv hauv hom ntawv no tau tso tawm kom pom tag nrho thiab muaj cov ntsiab lus siab.
Txoj Cai Ua Haujlwm
Tom qab kev teeb tsa thiab qhib lub kaw lus, kaw qhov tshwm sim pib. Txhua yam ntawm cov cuab yeej muaj lub hauv paus ntsiab lus ntawm kev ua haujlwm, tshwj tsis yog qee qhov nta muaj nyob hauv qee qhov ntawm lawv.
Lub cuab yeej tig rau ob peb feeb thaum kuaj pom cov lus tsa suab. Txawm li cas los xij, nws tsis ua haujlwm rau cov tsiaj uas hnyav dua 20 kg. Lub teeb liab kis tau los ntawm lub koob yees duab mus rau DVR. Cov ntaubntawv povthawj siv tau ua rau lub sijhawm teem sijhawm thiab khaws cia rau hauv lub cim xeeb kom txog rau thaumthov los yog tshaj tawm tam sim ntawm lub monitor. Tom qab txheeb xyuas qhov chaw ntawm cov lus tsa suab, cov teeb liab tuaj yeem mus rau ib lossis ntau lub vijtsam. Qhov no txiav txim siab hom teeb tsa thiab tus naj npawb ntawm kev sib txuas. Cov ntaub ntawv tuaj yeem pom tsis yog thaum lub sijhawm ua haujlwm, tab sis kuj tom qab kaw.
Lub hauv paus ntsiab lus ntawm kev ua haujlwm ntawm cov khoom siv tsheb sib txawv me ntsis. Cov cuab yeej no pib kaw tam sim ntawd tom qab qhib thiab kaw txuas ntxiv mus txog thaum lawv raug tua.
View files
Cov khoom siv network tuaj yeem nkag tau ntawm:
- Daim ntawv thov xov tooj ntawm tes. Raws li txoj cai, cov no yog cov kev pab cuam rau Android thiab iOS, kuj tseem muaj software rau Windows Phone thiab Blackberry.
- Network cov neeg siv khoom rau lub computer. Linux tau yuav luag tawm ntawm kev siv, Windows tau coj nws qhov chaw, MAC kuj pom.
- Browser ntawm ob lub xov tooj ntawm tes thiab desktop.
Hybrid devices
Hybrid DVRs rau tsev tau dhau los ua ntau dua niaj hnub no. Lawv tuaj yeem ua ke nrog cov khoom siv analog thiab IP koob yees duab (lossis HD-SDI). Cov txheej txheem zoo li no muaj ntau yam zoo, ntawm qhov tseem ceeb yog cov hauv qab no:
- Kev hloov pauv video zoo uas tsis nyob ntawm qhov deb ntawm cov khoom siv.
- Kev lag luam ua tiav los ntawm kev siv cov khoom siv analog thaum tsis xav tau kom nthuav dav.
- Txhim kho qhov ua tau zoo ntawm qhov system tam sim no los ntawmntxiv ob peb lub koob yees duab IP, piv txwv li, txhawm rau ntes lub ntsej muag lossis thaj chaw ntawm thaj chaw uas xav tau kom nthuav dav zoo.
Home DVRs
Cov tshuab niaj hnub tuaj yeem ntxiv nrog ntau qhov sib txawv ntawm cov khoom siv video, tus naj npawb ntawm cov koob yees duab soj ntsuam txiav txim siab qhov ntsuas no. Ntawd yog, ib qho khoom siv nrog 16 raws yog tsim los sau thiab khaws cov ntaub ntawv xa los ntawm 16 lub koob yees duab. Kho tsev DVR tuaj yeem muaj 64, 32, 16, 8 thiab 4 inputs.
Lwm yam tseem ceeb kuj tseem ceeb:
- Qhov kev daws teeb meem ntawm lub koob yees duab hauv cov khoom siv niaj hnub tuaj yeem sib txawv, piv txwv li, megapixel lossis tus qauv.
- Ib lub kaw lus tuaj yeem nruab nrog ntau lub kaw lus nrog cov qauv kev ua haujlwm sib txawv (AHD + HD-TVI lossis IP + SD + AHD).
- Saib tau los ntawm txhua qhov chaw ntawm huab cia. Cov haujlwm zoo li no tshwj xeeb tshaj yog yooj yim thaum tsis muaj tus IP zoo li qub thiab yog tias koj xav tau saib cov ntaub ntawv remotely.
- Thawj qhov tob. Lub tsev niaj hnub 2-lub koob yees duab DVR txuag cov ntaub ntawv khaws tseg ntawm lub disk built-in, kom cov ntaub ntawv khaws cia tau ntev.
Kev xaiv ntawm pob nyiaj siv thiab khoom kim
Thaum xaiv ib lub cuab yeej, koj yuav tsum xyuam xim rau nws cov ntsiab lus tseem ceeb:
- Ntau tus channels. Yog tias lub kaw lus tsuas muaj ib qho channel xwb, nws muaj peev xwm muab khi rau ib lub koob yees duab tshwj xeeb.
- Hard drives. mus rau pob nyiaj sivsystems, raws li txoj cai, tuaj yeem txuas ib lub hard drive, thiab tseem muaj peev xwm txwv qhov loj ntawm HDD. 3 TB tsav yuav tsis ua haujlwm zoo ntawm qee cov khoom siv.
- Yooj yim siv archive thiab interface. Ntau DVRs rau hauv tsev tsis yog qhov yooj yim tshaj plaws nrhiav rau cov ntaub ntawv tsim nyog thiab cov ntawv qhia zaub mov.
- tswb inputs. Lawv tau tsim los pib kaw tom qab kev ua haujlwm ntawm cov sensors sab nraud. Txawm tias muaj tseeb hais tias feem ntau ntawm cov khoom yog nruab nrog ib tug software built-in detector, lub tswb cuav yuav tshwm sim vim muaj ntau yam cuam tshuam. Qhov kev xaiv zoo tshaj plaws yog txhawm rau nruab cov cuab yeej tiv thaiv kev ruaj ntseg ntxiv. Vim muaj ntau lub tswb inputs, nws muaj peev xwm txuas lub tswb GSM, siren thiab lwm yam add-ons.
- Lub xub ntiag ntawm qhov tshwj xeeb interface rau tswj lub koob yees duab PTZ thiab siv cov chaw taws teeb tswj ntxiv.
- Siv lub DVD-RW lossis CD-RW tsav. Tam sim no, qhov xav tau ntawm qhov kev ua haujlwm no tau dhau los ua tsawg dua vim qhov tseeb tias ntau DVRs rau hauv tsev tuaj yeem hloov cov ntaub ntawv mus rau flash cards.
- Txhawb rau 3G modems. Feem ntau tsis tas yuav txuas rau lawv niaj hnub no, vim tias hom tshiab ntawm modems tau tshwm sim tas li, thiab cov qub tau dhau los ua tsis cuam tshuam. Qhov kev xaiv zoo tshaj plaws yuav yog los yuav ib lub cuab yeej nrog lub built-in GSM module yog tias koj xav tau nkag mus rau qhov system los ntawm kev sib txuas lus hauv xov tooj.
AHD technology
Qhov txiaj ntsig tseem ceeb ntawm qhov nothev naus laus zis yog hloov cov ntaub ntawv mus ntev. Nws yog nqa tawm los ntawm ib tug coaxial cable thiab khaws zoo tib yam txawm nyob rau hauv ib tug deb ntawm 500 meters. Tib lub sijhawm, IP systems kuj tseem tuaj yeem xa cov ntaub ntawv mus ntev, tab sis tsuas yog yog tias lub network fiber ntau tau tsim lossis ntxiv nrog cov cuab yeej tshwj xeeb.
Vim tias qhov zoo ntawm cov cuab yeej siv tsis cuam tshuam rau lub teeb liab, nws raug xa mus yam tsis muaj kev ncua, tsis compressed thiab tsim cov duab qhia ntawm lub monitor. Tib lub sijhawm, tswj cov teeb liab thiab cov ntaub ntawv audio tuaj yeem kis tau.
Lub tsev soj ntsuam DVR no tsis muaj kev cuam tshuam, uas yog ib qho teeb meem tshwm sim hauv kev xa cov ntaub ntawv, vim muaj cov cuab yeej siv tsawg. Cov txheej txheem installation zoo ib yam li kev teeb tsa ntawm cov khoom siv analog. Coaxial thiab ua ke cables yog siv rau kev sib kis. Yog tias koj muaj kev paub dhau los ntawm kev siv cov khoom siv analog, tsis tas yuav tsum tau txais cov txuj ci tshwj xeeb, uas yog qhov tseem ceeb tshwj xeeb yog tias koj tab tom ntxiv cov txheej txheem uas twb muaj lawm.
