Kunezici eziningi ezithinta ikhwalithi yezwi: uxhumano lwe-broadband, umkhawulokudonsa, i-hardware, isofthiwe nobuchwepheshe ngokwayo. Ama-bandwidth, i-hardware ne-software izici ezisemandleni ethu - singashintsha futhi sithuthukise futhi sizithuthukise; ngakho-ke uma sikhuluma ngekhwalithi yezwi ku-VoIP, sivame ukukhomba umunwe obuchwepheshe obuyikho ngokwayo, into engaphezu kokulawula kwethu njengabasebenzisi. Isici esivelele se-VoIP ubuchwepheshe buyinkinga yedatha.
Kuyini ukucindezelwa kwedatha?
Ukuncintisana kwedatha kuyinkqubo lapho idatha yezwi iphoqelelwe khona ukuyenza ibe yinto encane kakhulu yokudluliselwa. Isofthiwe yokucindezela (ebizwa ngokuthi i- codec ) ifakazela izimpawu zezwi kwimininingwane yedijithali ukuthi icindezeleke kumaphakethe alula futhi athuthwa phezu kwe-inthanethi. Lapho uya khona, la maphakethe adidliwe futhi anikezwa usayizi wabo wangempela (nakuba kungenjalo ngaso sonke isikhathi), futhi abuye abuyele ku-analog izwi futhi, ukuze umsebenzisi azwe.
Ama-Codec awasetshenziswanga kuphela ukucindezela, kodwa futhi nokufaka ikhodi, okusho nje ukuthi ukuhumusha kwezwi le-analog kube idatha yedatha engadluliselwa phezu kwamanethiwekhi e-IP.
Ikhwalithi kanye nokusebenza kahle kwesofthiwe yokucindezela, ngakho-ke, kunomthelela omkhulu kwizinga lezwi lezingxoxo ze-VoIP. Kukhona ubuchwepheshe obuhle bokucindezela futhi kukhona okuhle kakhulu. Okungcono kuthiwa, iteknoloji ngayinye yokucindezela iklanyelwe ukusetshenziswa okuthile ngaphansi kwezimo ezithile. Ngemuva kokucindezela, ezinye ubuchwepheshe bokucindezela bangela ukulahlekelwa okuthile ngokwemibandela yedatha ngisho namaphakethe. Lokhu kubangela izinga elibi lezwi.
I-VOIP ne-Compression Voice
I-VoIP ikhombisa futhi iphoqa idatha yezwi ngendlela yokuthi ezinye izakhi zomsakazo womsindo zilahlekile. Lokhu kuthiwa ukucindezeleka okulahlekile. Ukulahlekelwa akuyona inkinga enzima ngekhwalithi yezwi njengoba kuningi ngenhloso. Isibonelo, imisindo engeke izwakale indlebe yomuntu (ngevolumu engezansi noma ngaphesheya kwalokho kwe-spectrum yokuzwa) ilahlwa ngoba ngeke ibe yinto engelusizo. Futhi, ukuthula kulahliwe. Izingxenyana ezincane zomsindo ozwakalayo ulahlekile futhi, kodwa ama-bits amancane alahlekile ngezwi akukuvimbeli ekuqondeni lokho okushiwo.
Manje, uma umhlinzeki wakho wesevisi esebenzisa isofthiwe yokucindezela kwesokudla, uyojabula; kungenjalo ungadingeka ukukhononda kancane. Namuhla, ubuchwepheshe bokucindezela bukhulu kakhulu kangangokuthi ukukhishwa kwezwi kuphelela ngokuphelele. Kodwa inkinga ikhona ngokukhetha kwesofthiwe yokucindezela: isofthiwe ehlukile yokucindezela ivumelane nezidingo ezahlukene. Ngokwesibonelo, kukhona ezinye zezwi, ezinye zedatha kanye nezinye zefeksi. Uma uzama ukuthumela ifeksi usebenzisa isofthiwe yokucindezela izwi, ikhwalithi izohlupheka.
Ukuncintisana kwedatha, uma kuthuthukiswa kahle futhi kusetshenziselwa kahle, kungaba yinto ebonakalayo efaka i-VoIP ngenhla efonini yomhlaba ngokwezinga lezwi, futhi yenza kube ngcono. Lokhu kungenzeka uma nje ezinye izici (umkhawulokudonsa, i-hardware njll) zihle. Njengoba ukucindezela kunciphisa umthwalo wedatha ukuthi udluliselwe ngesikhathi esithile, imiphumela engcono ingafinyelelwa.
Funda kabanzi kuma- codec lapha , futhi ubone uhlu lwamakhodi ajwayelekile kakhulu asetshenziswa ku-VoIP lapha.