Emkhakheni wokusakaza ngedijithali, ama-head-end processors adlala indima ebalulekile ekudlulisweni kahle kwezimpawu zethelevishini nezomsakazo. Lesi sihloko sihlose ukucacisa ukuthi iyini i-digital headend kanye nokubaluleka kwe-headend processor kulesi simiso.
Iyini i-headend yedijithali?:
Isihloko sedijithali sibhekisela esizindeni esiyinhloko senethiwekhi yokusakaza ethola, icubungule futhi isabalalise amasignali ethelevishini nomsakazo esathelayithi, ikhebula noma umhlaba. Siyinhliziyo yesistimu, siqoqa amasignali emithonjeni eminingi futhi siwaguqule abe yifomethi efanele ukusatshalaliswa ngenethiwekhi. I-front-end yedijithali iqinisekisa ukuthi okuqukethwe kulethwa ezilalelini zokugcina ngendlela esezingeni eliphezulu nehambisanayo.
Indima yeprosesa ye-head-end:
Iiprosesa yekhanda iyingxenye ebalulekile ye-headend yedijithali futhi inesibopho sokuphatha nokucubungula amasignali angenayo. Umsebenzi wayo oyinhloko ukucubungula nokuhlela izinhlobo ezahlukene zamasignali omsindo nevidiyo zibe amafomethi afanele ukusatshalaliswa kumapulatifomu amaningi namadivayisi. Isebenza njengesango phakathi kokuqukethwe komsakazi kanye nenethiwekhi yokusabalalisa.
Iprosesa eyinhloko ithola amasignali avela emithonjeni ehlukene njengokuphakelwa kwesathelayithi, iziteshi zasendaweni kanye nemithombo ye-inthanethi. La masignali ayahlanganiswa, ahlukaniswe futhi aguqulwe abe yifomethi ejwayelekile kusetshenziswa amasu akhethekile okufaka ikhodi kanye nokudlulisa ikhodi. Iprosesa ibe isikhiqiza ama-multiplex, okuyizinqwaba zeziteshi noma izinsizakalo ezingadluliselwa ndawonye ngemvamisa eyodwa.
Iprosesa ye-head-end iphinde iphathe izinhlelo zokufinyelela ezinemibandela ukuqinisekisa ukusatshalaliswa kokuqukethwe okuphephile. Ibhala ngemfihlo futhi isuse ukubethela amasignali ukuze ivimbele ukufinyelela okungagunyaziwe kanye nokuphangwa. Ngaphezu kwalokho, yenza imisebenzi ehlukahlukene yokuhlola ikhwalithi kanye nokuqapha ukuze igcine ubuqotho bokuqukethwe okusakazwayo.
Izinzuzo kanye neNqubekela phambili:
Njengoba ubuchwepheshe buthuthuka, ama-headend processors ayaqhubeka nokukhula ukuze asekele izidingo zokusakaza kwesimanje. Manje afaka izici ezifana nokufaka ikhodi yevidiyo okuthuthukisiwe, amakhono okusakaza, ama-codec omsindo athuthukisiwe, kanye nokuhambisana nezindinganiso ezahlukene zokuthutha. Lezi zithuthukisi zivumela opharetha ukuthi banikeze okuqukethwe okunencazelo ephezulu, izinsizakalo ezisebenzisanayo kanye nokusetshenziswa kwe-bandwidth okuphumelelayo.
Iprosesa ye-head-end isebenza njengeyunithi yokulawula ephakathi, inikeza ukuguquguquka kanye nokukhula kubasebenzisi benethiwekhi. Ibavumela ukuthi bangeze noma basuse kalula iziteshi, benze ngezifiso amaphakheji okuqukethwe, futhi bazivumelanise nezintandokazi zezithameli ezishintshayo. Ngokusebenzisa i-multiplexing yezibalo, iprosesa ye-head-end yabela izinsiza ngokuguquguqukayo ngokwesidingo ukuze ithuthukise ukusetshenziswa kwe-bandwidth, ngaleyo ndlela yonge izindleko kubasebenzisi.
Isiphetho:
Ngokufigqiwe,amaprosesa ekhandaBangumgogodla wezinhlelo ze-digital headend futhi banesibopho sokucubungula, ukuphatha, nokusabalalisa amasignali omsindo namavidiyo kuwo wonke amapulatifomu ahlukahlukene. Kudlala indima ebalulekile ekuqinisekiseni ukuthi ababukeli bathola ulwazi lokubuka olungenamthungo nolusezingeni eliphezulu. Njengoba intuthuko iqhubeka, abaprosesa be-headend bayaqhubeka nokuguquka futhi bazivumelanise nesimo sokusakaza esishintsha njalo.
Isikhathi sokuthunyelwe: Novemba-09-2023