Bungwe la Open Media Alliance (AOMedia), lomwe limayang'anira chitukuko cha mtundu wa AV1/AV2 video coding, mtundu wa IAMF surround sound, ndi mtundu wa AVIF image, layamba kupanga Open Audio Codec (OAC), yomwe imaonedwa ngati kupitiriza kwa Opus codec yopangidwa ndi Xiph.Org. Laibulale ya liboac, yochokera ku libopus laibulale, ikuperekedwa ngati njira yogwiritsira ntchito OAC encoder ndi decoder pansi pa layisensi ya BSD.
Cholinga chachikulu cha OAC ndikutumiza mawu ndi mawu pa intaneti. Codec ndi yoyenera kugwiritsa ntchito mapulogalamu osiyanasiyana okhudzana ndi kutumiza mawu molumikizana ndipo ingagwiritsidwe ntchito m'magawo osiyanasiyana, kuyambira pa telefoni ya VoIP ndi misonkhano yamavidiyo mpaka macheza amasewera ndi makonsati akutali. OAC imatha kukulitsidwa poyika mawu otsatsira pa intaneti okhala ndi bitrate yapamwamba, monga nyimbo zapamwamba za stereo, komanso kukanikiza mawu panjira zolumikizirana zoletsedwa ndi bandwidth.
Kukula kudakali mu gawo loyambirira la alpha. Bitstream yopangidwa ndi laibulale ya liboac siyenera kugwiritsidwa ntchito pogawa mafayilo a OAC pagawo lino la chitukuko, chifukwa imaphatikizapo deta yowonjezera yokonza zolakwika ndipo sikuthandizira kufunafuna malo owonera.
Kupatulapo kusatchula za bitrate yamphamvu, kuchuluka kwa ma audio frequency, ndi kusintha kwa kukula kwa chimango, mndandanda wa zinthu za OAC umafanana ndi kufotokozera kwa codec ya Opus 1.5:
- Bitrate kuchokera pa 6 Kbps mpaka 510 Kbps;
- Zitsanzo pafupipafupi kuchokera 8 mpaka 48KHz;
- Kutalika kwa chimango kuchokera ku 2.5 mpaka 60 milliseconds;
- Imathandizira pafupipafupi (CBR) ndi ma bitrate osinthika (VBR);
- Thandizani mpaka mayendedwe 255;
- Imathandiza narrowband ndi wideband audio;
- Thandizo la mawu ndi nyimbo;
- Thandizani stereo ndi mono;
- Kuthekera kobwezeretsanso mawu omvera ngati chimango chitayika (PLC);
- Kupezeka kwa zochitika pogwiritsa ntchito masamu oyandama komanso osakhazikika.
Source: opennet.ru
