Niaj hnub no, kev soj ntsuam video yog qhov tseem ceeb hauv kev tsim kho hauv txhua qhov chaw ntawm lub neej.Kev tsim kho lub network video soj ntsuam tshuab ua rau nws yooj yim dua los saib xyuas cov chaw pej xeem thiab tau txais cov ntaub ntawv.Txawm li cas los xij, nrog rau qhov nrov ntawm cov ntsiab lus siab thiab kev txawj ntse ntawm cov koob yees duab soj ntsuam video, qhov yuav tsum tau ua rau cov teeb liab kis tau tus mob zoo, kwj bandwidth thiab kis tau tus mob nyob deb tau raug txhim kho, thiab cov kab hluav taws xob tooj liab uas twb muaj lawm nyuaj rau kev sib tw.Tsab ntawv xov xwm no yuav tham txog cov txheej txheem txuas tshiab uas siv cov kab hluav taws xob kho qhov muag thiab cov khoom siv kho qhov muag, uas tuaj yeem siv rau hauv kaw-circuit TV saib xyuas tshuab (CCTV) thiab IP network video saib xyuas tshuab.

Video soj ntsuam system txheej txheem cej luam

Niaj hnub no, kev sib tham hauv xov tooj cua tau dhau los ua neeg nyiam, thiab muaj ntau txoj hauv kev los tsim cov kab ke soj ntsuam video.Ntawm lawv, kev saib xyuas CCTV thiab IP koob yees duab saib xyuas yog cov kev daws teeb meem tshaj plaws.

Closed-circuit TV saib system (CCTV)
Nyob rau hauv ib tug raug kaw-circuit TV soj ntsuam system, ib tug ruaj analog lub koob yees duab (CCTV) txuas nrog ib tug cia khoom (xws li ib tug cassette video recorder VCR los yog ib tug digital hard disk video recorder DVR) los ntawm ib tug coaxial cable.Yog tias lub koob yees duab yog PTZ lub koob yees duab (txhawb txoj kab rov tav, qaij thiab zoom), yuav tsum tau ntxiv PTZ maub los ntxiv.

IP network video soj ntsuam system
Nyob rau hauv ib tug raug IP network video soj ntsuam network, IP koob yees duab yog txuas nrog lub zos cheeb tsam network los ntawm unshielded twisted-pair cables (ie, Qeb 5, Qeb 5, thiab lwm yam network jumpers) thiab keyboards.Sib txawv ntawm cov koob yees duab analog uas tau hais los saum no, IP koob yees duab feem ntau xa thiab txais IP datagrams los ntawm lub network yam tsis tas xa lawv mus rau cov khoom siv cia.Tib lub sijhawm, cov vis dis aus ntes tau los ntawm IP lub koob yees duab tau kaw rau ntawm txhua lub PC lossis server hauv lub network.Qhov loj tshaj plaws ntawm IP network video soj ntsuam network yog tias txhua lub koob yees duab IP muaj nws tus kheej IP chaw nyob, thiab tuaj yeem pom nws tus kheej sai. raws li tus IP chaw nyob hauv tag nrho video network.Nyob rau tib lub sijhawm, txij li qhov chaw nyob IP ntawm lub koob yees duab IP yog chaw nyob, lawv tuaj yeem nkag tau los ntawm thoob plaws lub ntiaj teb.

Qhov tsim nyog ntawm optical fiber transceiver hauv CCTV / IP network video soj ntsuam system

Ob leeg ntawm cov lus hais saum toj no-hais txog kev soj ntsuam video tuaj yeem siv rau hauv kev lag luam lossis thaj chaw hauv zej zog.Ntawm lawv, cov koob yees duab analog uas siv nyob rau hauv CCTV feem ntau siv coaxial cables lossis unshielded twisted khub cables (saum toj qeb peb network cables) rau kev sib txuas, thiab IP koob yees duab feem ntau siv unshielded twisted khub cables (saum toj no qeb tsib network cables) rau kev twb kev txuas.Vim hais tias ob lub tswv yim no siv tooj liab cabling, lawv tsis zoo rau fiber ntau cabling nyob rau hauv cov nqe lus ntawm kis tau tus mob nyob deb thiab network bandwidth.Txawm li cas los xij, nws tsis yooj yim los hloov cov tooj liab tam sim no nrog cov kab hluav taws xob kho qhov muag, thiab muaj cov teeb meem hauv qab no:

* Copper cables feem ntau tsau rau ntawm phab ntsa.Yog tias siv cov fibers kho qhov muag, cov khoom siv kho qhov muag yuav tsum tau muab tso rau hauv av.Txawm li cas los xij, qhov no tsis yooj yim rau cov neeg siv dav dav.Cov kws tshaj lij yuav tsum ua kom tiav cov txheej txheem, thiab cov nqi xaim tsis yog tsawg;
* Tsis tas li ntawd, cov cuab yeej siv lub koob yees duab ib txwm tsis tau nruab nrog cov chaw nres nkoj fiber ntau.

Nyob rau hauv qhov kev pom ntawm qhov no, txoj kev siv fiber ntau optical txuas uas siv fiber ntau optic transceivers thiab analog koob yees duab / IP koob yees duab tau nyiam cov neeg saib xyuas hauv network.Ntawm lawv, lub optical fiber transceiver converts tus thawj hluav taws xob teeb liab mus rau hauv ib tug kho qhov muag teeb liab kom paub qhov kev twb kev txuas ntawm tooj liab cable thiab optical fiber.Nws muaj qhov zoo hauv qab no:

* Tsis tas yuav txav los yog hloov cov xov tooj tooj liab yav dhau los, tsuas yog paub txog kev hloov pauv ntawm photoelectric los ntawm kev sib txawv ntawm cov khoom siv fiber ntau optical transceiver, thiab txuas cov tooj liab cable thiab optical fiber ntau, uas tuaj yeem txuag lub sijhawm thiab lub zog;
* Nws muab tus choj ntawm tooj liab nruab nrab thiab kho qhov muag fiber ntau nruab nrab, uas txhais tau hais tias cov cuab yeej siv tau los ua tus choj ntawm tooj liab cable thiab kho qhov muag fiber ntau.

Feem ntau, fiber ntau optic transceivers muab ib qho txiaj ntsig zoo los txuas ntxiv kev sib kis ntawm cov network uas twb muaj lawm, kev pabcuam lub neej ntawm cov khoom siv tsis yog fiber ntau, thiab kev sib kis ntawm ob lub network.