Video Conferencing Technology Development thiab High-Define Video Conferencing System

Video Conferencing Technology Development thiab High-Definition Video Conferencing System

Video conferencing yog ib qho piv txwv ntawm kev sib txuas lus kev sib txuas lus multimedia. Nyob rau xyoo 1960, cov tebchaws tau pib tshawb fawb txog kev sib tham video. Cov kev sib tham thaum ntxov video tau xa mus rau hauv hom analog, koom ua ib qho loj bandwidth. Nws sawv cev rau lub laj fai tsim tau los ntawm Bell Labs hauv Tebchaws Meskas thiab lub 1MHz bandwidth dub thiab dawb video sablaj ntawm British BT Company. kaw lus.

Ua ntej, kev sib tham video hauv kev tsim technology

Txij thaum xyoo 1980 los txog rau xyoo 1990, nrog rau kev loj hlob ntawm microelectronics, khoos phis tawj, cov teebmeem kev ua haujlwm thiab kev tsim duab siv technology, kev tshawb nrhiav theoretical thiab kev tsim cov tswv yim tsim video conferencing kuj tsim tau sai. Feem ntau, nws txoj kev loj hlob tau ntsib peb theem ntawm analog video conferencing, digital video conferencing thiab thoob ntiaj teb ib qho kev cai tawm digital video conferencing.

Txij li thaum xyoo 1960, tau tsim cov teb chaws hauv ntiaj teb no tau pib kawm tshuab analog video conferencing thiab maj mam muab lawv tawm.

Nyob rau xyoo 1960, tau tsav los ntawm kev siv tshuab thev naus laus zis, lub tshuab analog tig rau cov tshuab.

Thaum 1980s, 2Mbps xim digital video conferencing tsim tau tsim, thiab Nyiv thiab Tebchaws Asmeskas tau tsim ib qho kev tsis sibtham hauv kev sib tham video.

Nyob rau hauv nruab nrab xyoo 1980s, qhov loj hauv nruab nrab lub voj voog tshuab tsim tau sai, thiab cov duab codec tshuab tau ua rau kev sib txuas, thiab cov nqi ntawm cov nqi raug txo, uas tau muab cov kev tsim zoo rau kev sib tham video rau kev siv.

Txij thaum xyoo 1980 mus txog rau tam sim no, kev siv tshuab thev naus laus zis, tshuab computer, thiab kev sib txuas lus sib txuas lus sib txuas nrog txhua hnub. CCITT (tam sim no ITU-T) tau tsim H.200 series cov lus pom zoo, uas tau teev cov qauv kev tawm tswv yim thiab zis, kev siv algorithm, kev txhim kho kev ua yuam kev thiab cov qauv kev hloov ua ke, uas daws qhov teeb meem ntawm ntaus ntawv kev sib raug ntawm cov sib txawv cov neeg muag khoom. Qhov teeb meem zoo heev txhawb qhov kev tsim kho video tham.

Txij lub mid-1990s, kev lag luam ceev ceev ntawm kev sib txuas ntawm lub computer tau muaj kev cuam tshuam loj loj thiab muaj ntau ntawm kev lag luam. Kev sib txuas lus ntawm cov xov tooj sib thooj raws li cov tes hauj lwm sib pauv hloov tau maj maj ua ib qho ntawm cov neeg tshawb xyuas thiab kev sib txuas lus, network thiab cov tshuab computer. Internet Engineering Task Force (IETF) kuj tau tsim Daim Ntawv Teev Tseg Tawm Pov Hwm Thoob Ntiaj Teb (RTP), Cov Chaw Pov Ntawv Tiv Thaiv Cov Ntaub Ntawv (RSVP) thiab lwm yam ITU-T H.323 cov lus pom zoo los xyuas kom xa qhov tseeb ntawm cov suab thiab video ntws dhau IP networks .

Los ntawm keeb kwm ntawm video conferencing technology kev txhim kho, tam sim no, tsim kom muaj video conferencing systems yuav ua tau raws li ob lub ntsiab ITU-T lub tswv yim tswv yim H.323 thiab H.320, yog li ua ob txoj hau kev tsim kho. H.320 yog kev sib tw ua ntej ITU-T video conferencing. Tus txheej txheem yog raws li nkaus rau cov koob yees duab kev sib tham yees tswv yim thiab cov qauv kawm. H.323 tus qauv yog ua raws li kev sib txuas lus ntawm kev sib txuas ntawm lub computer sib txuas lus. Nws muaj sab nrauv rau txoj kev loj hlob. Txij li ITU-T pom zoo hauv tus txheej txheem hauv 1996, technology thiab kev lag luam rau kev sib tham video tau ua dhau kev tawm tsam kev hloov siab phem. Ntau thiab ntau lub tuam txhab tau sib tw tsim cov khoom tshiab H.323, thiab ntau cov neeg siv cov tshuab H.323 thiab cov khoom los tsim lawv cov kev sib tham video sib tham. Qhov no yog ib qho kev coj tsis ncaj es tau ua los ntawm txoj kev loj hlob sai thiab kev koom ua ke ntawm kev sib txuas lus network, computer technology thiab multimedia technology. Tsis tas li ntawd, H.323 system yog nce ntxiv zoo tshaj qhov H.320 qhov system hais txog advanced technology, ua haujlwm zoo, yooj yim ntawm kev khiav lag luam, kev tsim kho, thiab kev ua tau zoo.

Thib ob, qhov tshwm sim ntawm cov ntsiab lus tsim tawm video sib tham

Thaum ua haujlwm, qee qhov teebmeem tsis muaj peevxwm daws tau los ntawm teleconference, email lossis instant message, tabsis koj xav tau kev sib tham tim ntsej tim muag, yog li kev sib tham video ua ib qho tseem ceeb thiab txawm tias txoj hauv kev los daws cov teeb meem sib txuas lus no, thiab cov teeb meem video conferencing systems. Vim li ntawd, cov kev sib tham tsis tshua muaj txiaj ntsig zoo tuaj yeem tsis raug tsim, thiab qhov kev sib txuas lus ntawm kev sib txuas lus tau zoo heev. Yog li ntawd, nyob rau hauv qhov kev lag luam uas muaj zog, ib tug high-txhais video conferencing system yug. Nyob hauv thaj chaw ntawm video conferencing, manufacturers tseem tsom lub tswvyim ntawm "high definition". Yog li cas HD video conferencing? Tej zaum nws yuav vague rau qee tus neeg tuaj tshiab. Hauv qab no peb yuav txais lub tswvyim ntawm kev txhais cov yees duab siab thiab cov qauv ntawm cov ntsiab lus yees duab zoo nkauj. Qhov sib txawv ntawm HD video conferencing thiab HDTV, kev cai ntawm HD video conferencing, thiab qhov zoo ntawm HD video conferencing yog piav qhia nyob rau hauv kev nthuav dav.