Kev Siv Lub Sijhawm Tsis Siv Neeg Sau Tseg rau ntawm CCTV Cov Ntaub Ntawv
Hauv cov txheej txheem kev ruaj ntseg niaj hnub no, cov koob yees duab CCTV tsis yog tsuas yog ua cov cuab yeej saib xyuas pom xwb tab sis kuj yog cov cuab yeej sau ntawv uas khaws cov pov thawj ntawm cov xwm txheej raws sijhawm. Ib qho ntawm cov yam ntxwv tseem ceeb tshaj plaws - tab sis feem ntau tsis quav ntsej - yog lub sijhawm luam tawm tsis siv neeg ntawm cov yeeb yaj kiab CCTV. Qhov no qhia lub sijhawm thiab hnub tim ncaj qha rau ntawm cov yeeb yaj kiab, lossis khaws cia ua cov ntaub ntawv metadata uas tuaj yeem rov qab tau thaum xav tau. Tsab xov xwm no tham txog lub sijhawm luam tawm tsis siv neeg yog dab tsi, nws ua haujlwm li cas, vim li cas nws thiaj li tseem ceeb, thiab cov kev coj ua zoo tshaj plaws rau kev ua kom qhov no muaj tseeb thiab ntseeg tau thaum xav tau.
Kev Kaw Sijhawm Tsis Siv Neeg ntawm CCTV yog dab tsi?
Kev kaw lub sijhawm tsis siv neeg yog ib qho feature uas tso cai rau CCTV systems ntxiv cov ntaub ntawv hnub tim thiab sijhawm rau cov yeeb yaj kiab kaw. Cov ntaub ntawv no feem ntau pom ua cov ntawv me me nyob rau hauv kaum ntawm lub vijtsam. Ntawm qee lub systems, ntxiv rau qhov overlay, lub sijhawm kuj tseem khaws cia ua metadata hauv cov ntaub ntawv video, ua rau nws yooj yim dua rau kev tshawb nrhiav thiab synchronize.
Cov ntawv cim sijhawm feem ntau muaj:
– Hnub Tim (hom ntawv tuaj yeem yog DD/MM/YYYY lossis YYYY-MM-DD)
– Teev, feeb, vib nas this (HH:MM:SS)
- Qee zaum thaj chaw sijhawm (piv txwv li GMT + 7)
- Qee zaum lub koob yees duab lossis tus kheej channel (Cam 01, Chav tos txais qhua, Tsev rau khoom)
Nrog cov ntaub ntawv no, daim vis dis aus tsis yog tsuas yog qhia "dab tsi tshwm sim", tab sis kuj qhia "thaum twg nws tshwm sim" meej.
Vim li cas cov ntawv teev sijhawm thiaj tseem ceeb?
1. Txhim Kho Qhov Tseem Ceeb ntawm Cov Pov Thawj ntawm Cov Ntaub Ntawv Sau Tseg
Hauv cov ntsiab lus tshawb nrhiav, cov duab CCTV feem ntau siv los ua pov thawj txhawb nqa. Cov cim sijhawm pab tsim kom muaj qhov sib lawv liag ntawm cov xwm txheej thiab txuas cov duab rau lwm yam xwm txheej, xws li cov ntawv ceeb toom kev ruaj ntseg, cov ntaub ntawv nkag mus rau qhov rooj, lossis cov nyiaj them nqi. Yog tsis muaj cov cim sijhawm, cov duab tuaj yeem tsis meej: cov xwm txheej yuav zoo li meej, tab sis lub sijhawm tsis paub meej.
2. Ua kom yooj yim dua rau kev tshawb nrhiav cov ntaubntawv kaw suab
Ib qho ntawm cov teeb meem loj tshaj plaws hauv kev tswj hwm CCTV yog nrhiav ib daim vis dis aus tshwj xeeb ntawm ntau teev lossis ntau hnub ntawm cov yeeb yaj kiab. Nrog cov sijhawm tseeb, cov neeg ua haujlwm tuaj yeem dhia mus rau lub sijhawm ntawm qhov xwm txheej, xws li "02:13 sawv ntxov," yam tsis tas yuav rov qab ua daim vis dis aus los ntawm qhov pib.
3. Kev Sib Txuas Ntau Lub Koob Yees Duab
Hauv cov chaw ua haujlwm, tsev rau khoom, tsev kawm ntawv, lossis thaj chaw pej xeem, feem ntau muaj ntau lub koob yees duab. Kev tshawb nrhiav feem ntau xav tau kev kaw cov ntaub ntawv los ntawm ntau lub kaum sab xis tib lub sijhawm. Cov sijhawm sib xws ntawm cov koob yees duab tso cai rau kev sib dhos sai. Yog tias cov moos sib txawv txawm tias ob peb feeb ntawm cov koob yees duab, kev tshuaj xyuas qhov xwm txheej tuaj yeem tsis meej thiab kev txiav txim siab raws sijhawm tuaj yeem nyuaj.
4. Txhawb Kev Ua Haujlwm Tsis Siv Neeg thiab Kev Tshawb Fawb
Ntau lub tshuab niaj hnub siv cov kev tshuaj xyuas video, xws li kev ntes kev txav mus los, kev paub txog daim ntawv tsav tsheb, lossis kev suav neeg. Cov ntaub ntawv tshuaj xyuas feem ntau khaws cia nrog cov ntawv cim sijhawm. Cov ntawv cim sijhawm raug tseeb ua kom ntseeg tau tias cov xwm txheej uas tau ntes tau muaj lub sijhawm siv tau rau kev tshaj tawm thiab kev tshuaj xyuas.
Yuav Ua Li Cas Kev Sau Sijhawm Tsis Siv Neeg Ua Haujlwm
Feem ntau, lub sijhawm ntawm CCTV cov ntaub ntawv tuaj yeem los ntawm ntau qhov chaw:
1. DVR/NVR/Lub Koob Yees Duab Lub Moos Sab Hauv
Cov khoom siv kaw suab (DVRs rau cov koob yees duab analog, NVRs rau cov koob yees duab IP) muaj lub moos sab hauv. Qee lub koob yees duab IP kuj tswj hwm lawv tus kheej lub moos. Yog tias tsis sib dhos ua ke, cov moos sab hauv no tuaj yeem ploj mus raws sijhawm (lub moos ploj mus), tshwj xeeb tshaj yog rau cov khoom siv pheej yig lossis qub dua.
2. Sib txuas nrog NTP (Network Time Protocol)
Yuav kom tswj tau qhov tseeb, ntau lub tshuab muab kev sib dhos ua ke tsis siv neeg los ntawm NTP. Cov khoom siv yuav phim lawv lub sijhawm nrog lub server sijhawm hauv internet lossis lub tuam txhab lub server hauv zos. Qhov no yog txoj kev siv ntau tshaj plaws thiab pom zoo, vim nws tswj lub moos ruaj khov thiab sib xws thoob plaws ntau lub khoom siv.
3. Kev Sib Txuas Lus Nrog Centralized System
Hauv ib qho chaw ua lag luam, lub sijhawm tuaj yeem sib dhos ua ke los ntawm lub server sab hauv (piv txwv li, lub server sau npe lossis lub server sijhawm tshwj xeeb). Txoj hauv kev no ua rau muaj kev tswj hwm ntau dua, tshwj xeeb tshaj yog thaum kev nkag mus rau hauv internet raug txwv.
Overlay Timestamp vs Metadata: Qhov txawv yog dab tsi?
Daim Ntawv Teev Sijhawm Overlay
- Pom ncaj qha hauv video.
- Nyuaj rau tshem tawm yam tsis tau hloov kho cov yeeb yaj kiab.
- Muaj txiaj ntsig zoo thaum cov yeeb yaj kiab raug xa tawm mus rau cov ntaub ntawv ib txwm muaj thiab ua si ntawm txhua lub cuab yeej.
Qhov tsis zoo: Yog tias cov ntawv sau txog cov khoom tseem ceeb (xws li lub ntsej muag lossis daim ntawv tsav tsheb), nws tuaj yeem ua rau neeg tsis xav nyeem. Yog li ntawd, kev teeb tsa thiab qhov loj ntawm cov ntawv sau kom zoo yog qhov tseem ceeb.
Lub Sijhawm Ua Metadata
- Feem ntau tsis pom ntawm qhov screen.
- Siv rau kev tshawb nrhiav, kev ntsuas, thiab kev ua si hauv qee cov software.
- Zoo nkauj dua, tab sis nyob ntawm tus neeg ua si lossis daim ntawv thov uas txhawb nqa nws.
Qhov zoo tshaj plaws, lub kaw lus txhawb nqa ob qho tib si: overlays rau cov pov thawj pom thiab metadata rau kev tshawb nrhiav sai.
Cov Teeb Meem Feem Ntau Nrog CCTV Timestamps
1. Lub moos kaw lawm (tsis yog)
Cov ua rau muaj xws li tsis siv NTP, lub roj teeb CMOS tsis muaj zog (hauv qee lub DVRs), fais fab tuag ntau zaus, lossis kev teeb tsa tsis raug. Cov txiaj ntsig yog qhov loj heev: cov ntaub ntawv kaw suab nyuaj rau siv ua lub sijhawm siv thiab tuaj yeem ua rau muaj kev tsis ntseeg siab thaum lub sijhawm tshuaj xyuas.
2. Lub Sijhawm Hloov Tom Qab Qhov Xwm Txheej
Yog tias tus thawj coj hloov lub moos ntawm lub cuab yeej tom qab muaj xwm txheej, lub sijhawm ua haujlwm yuav ua rau tsis meej pem. Txawm tias lub hom phiaj tsuas yog kho qhov xwm txheej xwb, qhov kev hloov pauv no tuaj yeem ua rau muaj lus nug txog kev ncaj ncees ntawm cov pov thawj. Yog li ntawd, cov kev hloov pauv teeb tsa yuav tsum tau sau tseg thiab ua raws li cov txheej txheem meej.
3. Lub Sijhawm Thaj Tsam Tsis Yog
Qhov yuam kev ntawm thaj chaw sijhawm ua rau cov ntaubntawv povthawj zoo li "ua ntej" lossis "rov qab" ntau teev. Qhov no feem ntau tshwm sim rau cov khoom siv uas siv cov chaw teeb tsa ua ntej ntawm lub Hoobkas lossis raws li thaj chaw sijhawm ntawm lub tebchaws sib txawv.
4. Hom Hnub Tim Uas Tsis Meej
Hom ntawv DD/MM/YYYY piv rau MM/DD/YYYY feem ntau ua rau kev nkag siab yuam kev, tshwj xeeb tshaj yog thaum hnub thiab hli yog ob qho tib si <= 12. Rau cov kab ke uas muaj ntau tus neeg siv, hom ntawv ISO (YYYY-MM-DD) feem ntau muaj kev nyab xeeb dua. Cov Kev Xyaum Zoo Tshaj Plaws rau Cov Sijhawm Tseeb 1. Qhib NTP ntawm DVR/NVR thiab txhua lub koob yees duab IP, tom qab ntawd teev ib lub server NTP uas ntseeg tau. 2. Teem lub sijhawm thaj tsam rau tib yam (piv txwv li, WIB/GMT+7) thiab xyuas kom meej tias cov khoom siv ua raws li qhov chaw ntawd. 3. Xauv kev nkag mus rau kev teeb tsa: txwv tsis pub leej twg tuaj yeem hloov lub sijhawm thiab cov chaw teeb tsa ntawm lub kaw lus. 4. Siv UPS rau DVR/NVR thiab cov khoom siv network kom tiv thaiv lub sijhawm los ntawm kev pib dua thaum lub zog hluav taws xob tsis ua haujlwm. 5. Kev tshuaj xyuas tsis tu ncua: xyuas qhov tseeb ntawm lub sijhawm tsawg kawg ib hlis ib zaug, tshwj xeeb tshaj yog nyob rau hauv cov chaw uas muaj kev tsaus ntuj ntau zaus lossis kev sib txuas hauv internet tsis ruaj khov. 6. Tso cov overlays kom lawv tsis npog cov chaw tseem ceeb (qhov rooj, cov neeg sau nyiaj, ntsej muag, daim ntawv tsav tsheb). 7. Khaws cov ntaub ntawv hloov pauv: cov khoom siv zoo sau thaum lub sijhawm teeb tsa tau hloov pauv thiab los ntawm leej twg. Qhov no pab tswj qhov kev ntseeg siab ntawm cov ntaubntawv kaw. Cov sijhawm sau hauv Cov Cai thiab Kev Ua Raws Cai Hauv qee kis, cov duab CCTV siv rau kev tshaj tawm sab hauv, kev thov pov hwm, lossis kev foob raws cai. Cov sijhawm sau sib xws thiab txhim khu kev qha pab qhia tias cov duab muaj lub sijhawm meej. Txawm hais tias cov sijhawm sau tsis yog tib qho tseem ceeb hauv kev txiav txim siab qhov tseeb ntawm cov pov thawj, lawv qhov tsis muaj lossis tsis raug tuaj yeem ua rau lub zog ntawm tog neeg uas nthuav tawm cov duab ua pov thawj txhawb nqa. Ntxiv mus, hauv cov tuam txhab uas muaj cov cai ruaj ntseg ntawm cov ntaub ntawv, kev sau sijhawm kuj tseem cuam tshuam nrog kev ua raws cai: thaum cov ntaub ntawv raug kaw, nws khaws cia ntev npaum li cas, thiab thaum nws raug rho tawm. Tag nrho cov no nyob ntawm lub sijhawm system raug. Xaus Lus Kev sau sijhawm tsis siv neeg ntawm cov duab CCTV yog ib qho tseem ceeb ntawm lub kaw lus ruaj ntseg. Nws pab ua kom ntseeg tau tias cov duab tsis yog tsuas yog cov ntaub ntawv pom, tab sis kuj yog cov ntaub ntawv teev sijhawm uas pab txhawb kev tshawb nrhiav, kev sib dhos, kev tshawb nrhiav, thiab kev tshuaj xyuas. Txawm li cas los xij, cov txiaj ntsig no tsuas yog siab tshaj plaws yog tias cov sijhawm sau tau khaws cia kom raug los ntawm kev sib dhos NTP, kev teeb tsa thaj chaw sijhawm raug, thiab cov txheej txheem tswj hwm kev qhuab ntuas. Yog tias koj tab tom txhim kho lossis tswj hwm CCTV, xyuas kom meej tias qhov tshwj xeeb ntawm lub sijhawm sau tsis yog "rau," tab sis kuj raug, sib xws, thiab txheeb xyuas. Vim tias thaum muaj xwm txheej tshwm sim, cov ntsiab lus me me xws li lub sijhawm thiab hnub tim feem ntau dhau los ua cov txiav txim siab loj hauv kev txiav txim siab zoo.
