Ma Codec Ambiri Amagwiritsidwa Ntchito pa VoIP Apps ndi Devices
Mukayitana mafoni pa intaneti kudzera pa Voice over IP (VoIP) kapena pa intaneti zina, liwu liyenera kulembedwa mu deta, ndipo mofananamo. Mu njira yomweyi, deta imakanikizidwa kotero kuti kuyambukira kwake kuli mofulumira ndipo chidziwitso choyitana chiri bwino. Kukopera uku kumachitika ndi codecs (yomwe ndi yochepa kwa encoder decoder).
Pali ma codec ambiri a mavidiyo, mavidiyo, fax ndi malemba.
M'munsimu muli mndandanda wa ma codec ofala kwambiri wa VoIP. Monga wogwiritsa ntchito, mungaganize kuti mulibe zochepa pa zomwe izi ziri, koma nthawi zonse ndibwino kudziŵa zochepa za iwo, popeza muyenera kusankha zosankha tsiku lina zokhudzana ndi VoIP mu bizinesi yanu; kapena tsiku lina amatha kumvetsa mawu ena mwa anthu achi Greek VoIP akuyankhula.
Chinthu china chomwe mungatchedwe kuti muzindikire za codecs ndi pamene mukuyenera kuganizira pulogalamu kapena hardware musanagule. Mwachitsanzo, mungasankhe ngati mukufuna kukhazikitsa pulogalamuyi kapena kuti yodalira ma codec omwe akupereka pafoni yanu pokhudzana ndi zosowa zanu. Ndiponso, mafoni ena ali ndi codecs omwe mungakonde kuganizira musanasankhe.
Common VoIP Codecs
| Codec | Bandwidth / kbps | Ndemanga |
| G.711 | 64 | Amapereka chidziwitso cholondola cha kulankhula. Zosakaniza zochepa kwambiri purosesa. Zosowa zosachepera 128 kbps njira ziwiri. Ndi imodzi mwa ma codecs akale kwambiri (1972) ndipo amagwira ntchito bwino pamtunda wautali, zomwe zimapangitsa kuti zisagwiritsidwe bwino ntchito pa intaneti koma zimakhala zabwino kwa LAN. Amapereka MOS 4.2 omwe ali apamwamba kwambiri, koma zinthu zabwino kwambiri zimayenera kukumana. |
| G.722 | 48/56/64 | Kusinthasintha kuzinthu zosiyana ndi kugwedezeka kwapakati kumatetezedwa ndi makompyuta. Ikulumikiza maulendo afupipafupi kawiri kuposa G.711, zomwe zimapangitsa kukhala wabwino komanso omveka bwino, pafupi kapena bwino kuposa PSTN. |
| G.723.1 | 5.3 / 6.3 | Kulimbana kwakukulu ndi mafilimu apamwamba. Mungagwiritse ntchito pogwiritsira ntchito podutsa ndi malo otsika a bandwidth, chifukwa imagwira ntchito yochepa kwambiri. Koma, imafuna mphamvu zambiri za purosesa. |
| G.726 | 16/24/32/40 | G.721 ndi G.723 (zosiyana ndi G.723.1) |
| G.729 | 8 | Ntchito yabwino yogwiritsira ntchito mawindo. Cholakwika cholekerera. Ichi ndi chithukuko kuposa ena omwe amawatcha dzina lofanana, koma liri ndi chilolezo, kutanthawuza kwaulere. Otsatsa otsiriza amalipira mwachindunji pa layisensiyi pamene agula hardware (mafoni a foni kapena zipata) zomwe zimayigwiritsa ntchito. |
| GSM | 13 | Chiŵerengero chapamwamba kwambiri. Zowonjezeka ndipo zimapezeka pamawindo ambiri a ma hardware ndi mapulogalamu. Kutsindika komweku kumagwiritsidwa ntchito m'mafoni a GSM (Mabaibulo abwino amagwiritsidwa ntchito masiku ano). Zimapereka MOS wa 3.7, zomwe si zoipa. |
| iLBC | 15 | Amayendera Internet Low Bit Rate Codec. tsopano yapezeka ndi Google ndipo ili mfulu. Zowonongeka ku paketi ya phukusi, imagwiritsidwa ntchito ndi mapulogalamu ambiri a VoIP makamaka omwe ali otseguka. |
| Speex | 2.15 / 44 | Amachepetsa kugwiritsidwa ntchito kwagwedeti pogwiritsira ntchito bit variable. Ndi imodzi mwa codecs yomwe imakonda kwambiri kugwiritsa ntchito mapulogalamu ambiri a VoIP. |
| SILK | 6 mpaka 40 | SILK yakhazikitsidwa ndi Skype ndipo tsopano ili ndi chilolezo, pokhala ngati ufulu waulere wosatsegula, umene wapanga mapulogalamu ena ndi mautumiki ena kuti azigwiritse ntchito. Ndilo maziko a kodec yatsopano yotchedwa Opus. Chitsanzo cha WhatsApp cha pulogalamu yogwiritsa ntchito Opus codec ya mafoni. |