Uthungelwano lweTV yekhebhula abantwana abancinci. Icandelo 9: Intloko

I-headend iqokelela iimpawu kwimithombo emininzi, isebenze kwaye isasaze kwinethiwekhi yentambo.

Iziqulatho zoluhlu lwamanqaku

• Icandelo 1: Uyilo lwenethiwekhi yeCATV ngokubanzi
• Icandelo 2: Ukuqulunqwa komqondiso kunye nokumila
• Icandelo 3: Icandelo leSiginali ye-Analog
• Icandelo 4: ICandelo loMqondiso weDijithali
• Icandelo 5: Inethiwekhi yokusabalalisa i-coaxial
• Icandelo 6: I-RF Signal Amplifiers
• Icandelo 7: Abamkeli bamehlo
• Icandelo 8: Inethiwekhi ye-Optical backbone
• Icandelo 9: Intloko
• Icandelo 10: Ukulungisa inethiwekhi yeCATV

Sele kukho inqaku elimangalisayo kuHabré malunga noyilo lwesihloko: Yintoni engaphakathi kwisihloko sentambo. Andizukuphinda ndiyibhale ngamazwi am kwaye ndiya kucebisa abo banomdla ukuba baziqhelanise nayo. Inkcazo yento ekummandla wam iya kuba mnandi kakhulu, kuba asinazo izixhobo ezahlukeneyo, kwaye yonke inkqubo yesignali iphathwa yi-chassis ye-AppearTV enamakhadi ahlukeneyo okwandisa, iindidi ezivumela yonke imisebenzi ukuba ingene. iiyunithi ezine chassis eziliqela.

Umfanekiso ovela kwiwebhusayithi deps.ua

Ezi zixhobo zikuvumela ukuba ulawule zonke iinkqubo ngokusebenzisa ujongano lwewebhu olusebenzayo, oluxhomekeke kumxholo we-hardware we-chassis.


Ukongeza, asiqokeleli isiginali esemoyeni, ngoko ke iposti yethu ye-antenna ijongeka ngolu hlobo:

Umfanekiso weForam chipmaker.ru Bendingavumelekanga ukuba ndifake ifoto yokwenyani yesikhululo sethu.

Eli nani lezitya liyimfuneko ukufumana iziteshi ezivela kwiisathelayithi ezininzi ngaxeshanye.

Umqondiso wesathelayithi udla ngokuvalwa ngokukrwempa: olu luhlobo lofihlo apho iisimboli zolandelelwano zixutywa ngokwe-algorithm enikiweyo. Oku akudingi amandla amaninzi ekhompyutheni kunye nexesha lokuphumeza, oku kuthetha ukuba isignali iqhutywe ngaphandle kokulibazisa. Kwifom ye-hardware, isazisi sombhalisi (nokuba ngaba ngumboneleli ogqithisela umqondiso ngakumbi kwinethiwekhi yayo) likhadi eliqhelekileyo kunye ne-chip, elifakwe kwimodyuli yokufikelela kwimiqathango (CAM) kunye nojongano lweCI, ngokufanayo nakuyiphi na iTV yanamhlanje.


Ngokwenyani, zonke iimathematika zenziwa ngaphakathi kwimodyuli, kwaye ikhadi lineseti yezitshixo. Umsebenzisi unokubethelela umlambo kunye nezitshixo ezaziwa yikhadi (kwaye umqhubi ngokwakhe wazibhala ekhadini) kwaye, ngoko, ulawule isethi yokubhaliselwa ukuya kuqhawula ngokupheleleyo ikhadi kwisistim, utshintshe i-identifier "yomqhubi" oyintloko. Le yinkcazo nje jikelele yendlela ezisebenza ngayo iinkqubo zofikelelo olunemiqathango; enyanisweni, zininzi ezohlukeneyo: kwelinye icala, zihlala ziqhekezwa, kwaye kwelinye, i-algorithms iya isiba nzima, kodwa yahluke ngokupheleleyo. ibali...

Kuba umqhubi ukwabonelela ngeepakethe zetshaneli ezihlawulelwayo kuthungelwano, ngoko ke kuyimfuneko ukuba uzifakele iikhowudi phambi kokuba uzidlulisele kwinethiwekhi. Lo msebenzi wenziwa zizixhobo zomboneleli wenkqubo yokufikelela kwimiqathango yomntu wesithathu, obonelela oku kumqhubi njengenkonzo. Izixhobo ezifakwe kwi-headend ziqinisekisa ukusebenza kwenkqubo yokufikelela kwimiqathango kumxholo: zombini i-encryption kunye nokulawulwa kwezitshixo ezibhaliswe kwi-smart cards.

PS Akukho mntu wandinceda ngenqaku kwi-DOCSIS, ukuba nabani na unomnqweno, ndiya kuvuya, bhala.

umthombo: www.habr.com