DAB TSI YOG NDI ™ NETWORK CEV UA TOM TSEV

Dab tsi yog NDI ™ (Network Device Interface)?

NDI ™ (Network Ntaus Interface) yog ib txoj kev ywj pheej ywj pheej rau Vev Xaib IP, tsim los ntawm NewTek. Nws yog tsim los faib kev faib cov yees duab nyob hauv tus IP uas twb muaj lawm, freeing cov neeg siv los ntawm kev kho vajtse xyuas thiab muab cov txiaj ntsig ntawm txo tus nqi thiab kev xa tawm sijhawm.

Daim ntawv no yuav qhia txog cov hauv qab no:

Taw qhia rau NDI
Dab tsi yog hom khoom siv NDI txhawb?
NDI siv ntau npaum li cas bandwidth?
NDI thiab video compression
NDI Compression piv txwv
NDI tawm tswv yim
Koj ua li cas ntxiv NDI rau koj lub network?

YOG DAB TSI DAB TSI?

Raws li lub neej yav tom ntej ntawm video tsiv ntawm ntau lub network raws li kev faib tawm, NDI yog ib qho yooj yim thiab ntau yam daws, cia ntau video ntws ntawm kev sib txuas sib tham. NDI txhawb nqa zoo, tsis muaj latency, thev-yees duab zoo dua cov txheej txheem Ethernet.

NDI stands rau Network Device Interface thiab tsim los ntawm NewTek. NewTek tshaj tawm NDI hauv xyoo 2015, thiab raws tu qauv tau tsim muaj rau pej xeem siv thaum ntxov xyoo 2016. Thaum xyoo 2017, cov txheej txheem 3 tawm ntawm qhov kev sib txuas lus tau tso tawm, ntxiv cov kev pabcuam multicast, zoo siab hom hu ua NDI-HX thiab lwm yam.

Multicast yog pawg sib txuas lus uas cov ntsiab lus tau hais rau ntau lub chaw destinations ib zaug thiab muaj ib qho zoo los ntawm kev txo cov kev siv bandwidth los ntawm NDI transmitter.

NDI HX yog cov ntaub ntawv qis tus xaj uas siv tau rau cov kev txwv tsis pub qis, xws li Wi-Fi thiab 4G networks.

YUAV UA LI CAS NTAWM NDI-TXHEEJ TXHEEM KHOOM YOG MUAJ?

NDI yog kev txhawb los ntawm ntau cov tuam ntxhab thiab cov tsim tawm ntawm ob qho cuab yeej thiab software. Raws li nws tau txais kev pabcuam hauv kev sib txuas ntawm lub network thiab software, koj nrhiav tau video mixers, graphics systems, ntes ntawv, thiab ntau lwm yam khoom siv nrog NDI yug. Ntawm no yog ob peb yam loj:

NewTek
Adobe / Adobe Creative Cloud
JVC Professional
Panasonic
Evertz
LiveU
Deltacast
NewBlue

Hauv qab ntawm tsab xov xwm koj yuav pom ntau daim ntawv teev npe.

NDI TSWV YIM YUAV TSUM TAU

Qhov yuav tsum tau siv qhov sib txuas rau NDI kev sib kis yuav txawv, nyob ntawm txoj kev daws teeb meem thiab tus ncej. NDI encoding algorithm nws tus kheej yog kev daws teeb meem thiab tus qauv ntawm tus kheej, thiab txhawb kev daws teeb meem txog li 4K thiab dhau ntawd. Nrog nws cov kev kawm siab dua GigE tes hauj lwm, nws ua rau txoj kev hloov chaw mus rau ib qho zoo kawg nkaus IP duab yeeb yaj kiab uas tsis muaj kev cuam tshuam nrog cov kev nqis peev uas twb muaj nyob hauv SDI cov koob yees duab thiab cov infrastructure, los yog cov nuj nqis tshiab high-speed network infrastructures.

* qhov chaw: https://support.newtek.com/hc/en-us/articles/217662358-NDI-Network-Device-Interface-Onlook

LI CAS YOG TUS NEEG MUAJ NDI HAUV VIDEO COMPRESSION?

NDI siv kev yuam kom ua kom muaj kev sib kis ntawm video kwj nyob hauv lub network. Raws li NewTek, NDI yog ib qho ntawm ntau tus qauv codecs hauv hav tsuag :

"NDI ua tiav zoo dua qhov yawm suab ntau tshaj qhov feem ntau cov codec uas tau txais rau kev siv kev tshaj tawm. Rau qhov raug, niaj hnub Intel-raws i7 processor, lub codec yog muaj peev xwm luam qhov 1920 x 1080 video teeb liab ntawm 250 thav ntawv ib zaug siv ib tus tub ntxhais hluas.

Lub ncov teeb liab-piv siab (PSNR) ntawm NDI codec ntau tshaj 70dB rau cov ntsiab lus yees duab. Uniquely, thiab tseem ceeb, NDI yog tus thawj zaug tau codec los muab kev siv ntau lub zog. Qhov no txhais tau hais tias thaum ib lub vev xaib video tau muab tso tawm, tsis muaj kev poob ntxiv lawm.

NDI muaj ib txoj kev latency ntawm 16 video kab sib cais, tab sis nyob rau hauv kev xyaum, feem ntau cov kev siv yuav yog ib qho ntawm latency. "

NDI COMPRESSION EXAMPLES

NDI compresses lub video ntws kom cov NDI video ntws raug faib los ntawm lub network ntawm ib qho ratio 15: 1 mus rau ib qho tsis thooj yeeb yaj duab ntawm tib hom. Cov nram qab no yog ib qho kev kwv yees ntawm cov khoom siv bandwidth ntawm ib lub NDI video stream rau cov tub luam ntau hom, thiab yog muab los ntawm NewTek cov ntaub ntawv "Muab NDI rau koj lub network":

1 x dej SD video = 20 Mbps
1 x kwj 1080p50 / 59.94 video = 125Mbps
1 x kwj 720p50 / 59.94 video = 90 Mbps
1 x kwj UHDp30 video = 200Mbps
1 x kwj 1080i50 / 59.94 video = 100Mbps
1 x kwj UHDp60 video = 250Mbps

NDI FORMATS

NDI txhawb txhua yam kev daws teeb meem, tus nqi thiab video ntws, nrog thiab tsis muaj alpha channel.Lub feem ntau cov kev siv yuav tsum siv 8-ntsis UYVY thiab RGBA video, tiam sis kev txhawb rau 10-ntsis thiab 16-ntsis yog muaj. Lub raj xa dej ntawm lub codec yog tswj nyob rau ntawm 16-ntsis lossis zoo dua.

YUAV UA LI CAS THIAJ NDI NROG KOJ NETWORK?

NDI ua haujlwm ntawm tus qauv IP raws li tes hauj lwm, qhov uas yuav tsum ua kom tshwj xeeb yog ze rau xoom. Qhov no yog vim hais tias cov NDI-enabled cov cuab yeej coj zoo li txhua lwm yam kev txuas nrog lub network.

Thaum lub NDI kev koom ua ke yog tsim los kom tsis muaj mob li qhov ua tau, muaj qee yam tseem ceeb rau kev paub txog NDI. Cov nram qab no yog muab los ntawm NewTek cov ntaub ntawv "Muab NDI rau koj lub network" :

NDI siv mDNS rau kev nrhiav pom thiab kev teev npe ntawm cov khoom siv ntawm lub network

NDI yuav xa qhov chaw nyob ntawm tus IP thiab cov chaw nres nkoj ntawm cov khoom siv los mus destinations ntawm kev tawm lus teb
Lub mDNS Ethernet thav duab yog lub pob ntawv ntau tshaj plaws uas tawm rau IPv4 chaw nyob 224.0.0.251 thiab siv UDP chaw nres nkoj 5353
NDI cov kev siv tawm ua ntej Lub Kaum Hli 2016 yuav tsuas tau muaj kev tshawb pom tsis zoo uas muaj kev xaiv