{"id":105223,"date":"2022-10-01T09:36:41","date_gmt":"2022-10-01T07:36:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/google-opublikoval-otkrytyj-audiokodek-lyra-v2"},"modified":"2022-10-01T09:36:41","modified_gmt":"2022-10-01T07:36:42","slug":"google-opublikoval-otkrytyj-audiokodek-lyra-v2","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sq\/blog\/news\/google-opublikoval-otkrytyj-audiokodek-lyra-v2","title":{"rendered":"Google publikoi kodekun e hapur t\u00eb audios Lyra V2","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"
Kompania Google paraqiti kodekun e audios Lyra V2, i cili p\u00ebrdor metoda t\u00eb m\u00ebsimit t\u00eb makinerive p\u00ebr t\u00eb arritur cil\u00ebsin\u00eb maksimale t\u00eb transmetimit t\u00eb z\u00ebrit edhe n\u00eb kanale shum\u00eb t\u00eb ngadalta. Versioni i ri p\u00ebrfshin kalimin n\u00eb nj\u00eb arkitektur\u00eb t\u00eb re t\u00eb rrjetit nervor, mb\u00ebshtetje p\u00ebr platforms t\u00eb tjera, mund\u00ebsi t\u00eb zgjeruara p\u00ebr menaxhimin e bitrate-it, rritje t\u00eb performanc\u00ebs dhe arritjen e cil\u00ebsis\u00eb m\u00eb t\u00eb lart\u00eb t\u00eb tingullit. Implementimi referenc\u00eb i kodit \u00ebsht\u00eb shkruar n\u00eb C++ dhe shp\u00ebrndahet n\u00ebn licenc\u00ebn Apache 2.0. <\/p>\n
Sa i p\u00ebrket cil\u00ebsis\u00eb s\u00eb t\u00eb dh\u00ebnave t\u00eb z\u00ebrit t\u00eb transmetuara n\u00eb shpejt\u00ebsi t\u00eb ul\u00ebta, Lyra tejkalon ndjesh\u00ebm kodek\u00ebt tradicionale, t\u00eb cil\u00ebt p\u00ebrdorin metoda t\u00eb p\u00ebrpunimit digjital t\u00eb sinjaleve. P\u00ebr t\u00eb arritur cil\u00ebsin\u00eb e lart\u00eb t\u00eb transmetimit t\u00eb z\u00ebrit n\u00eb kushte kufizuese t\u00eb volumit t\u00eb t\u00eb dh\u00ebnave t\u00eb transmetuara, p\u00ebrve\u00e7 metodave t\u00eb zakonshme t\u00eb kompresimit t\u00eb z\u00ebrit dhe transformimit t\u00eb sinjaleve, n\u00eb Lyra aplikohet nj\u00eb model z\u00ebri i bazuar n\u00eb sistemin e m\u00ebsimit t\u00eb makinerive, i cili lejon rikonstruksionin e informacionit t\u00eb humbur mbi baza t\u00eb karakteristikave tipike t\u00eb z\u00ebrit. <\/p>\n
Kodeku p\u00ebrfshin nj\u00eb kodues dhe nj\u00eb dekodues. Algoritmi i funksionit t\u00eb koduesit p\u00ebrfshin nxjerrjen e parametrave t\u00eb t\u00eb dh\u00ebnave t\u00eb z\u00ebrit \u00e7do 20 milisekonda, kompresimin e tyre dhe transmetimin tek prij\u00ebsi n\u00ebp\u00ebr rrjet me bitrate nga 3.2kbps deri n\u00eb 9.2kbps. N\u00eb an\u00ebn e pranuesit, dekoduesi p\u00ebrdor nj\u00eb model gjenerativ p\u00ebr t\u00eb rikthyer sinjalin origjinal t\u00eb z\u00ebrit mbi baza t\u00eb parametrave t\u00eb transmetuar t\u00eb z\u00ebrit, t\u00eb cil\u00ebt p\u00ebrfshijn\u00eb spektrogramet mel-logaritmike, duke marr\u00eb parasysh karakteristikat e energjis\u00eb s\u00eb z\u00ebrit n\u00eb gam\u00eb t\u00eb ndryshme frekuencash dhe t\u00eb p\u00ebrgatitura n\u00eb p\u00ebrputhje me modelin e perceptimit t\u00eb d\u00ebgjimit t\u00eb njeriut. <\/p>\n
N\u00eb Lyra V2 \u00ebsht\u00eb p\u00ebrdorur nj\u00eb model i ri gjenerativ i bazuar n\u00eb nj\u00eb rrjet nervor konvencional SoundStream, i cili shfaq k\u00ebrkesa t\u00eb ulta p\u00ebr burime kompjuterike, duke lejuar k\u00ebshtu dekodimin n\u00eb koh\u00eb reale edhe n\u00eb sisteme t\u00eb dob\u00ebta. Modeli i angazhuar p\u00ebr gjenerimin e z\u00ebrit \u00ebsht\u00eb trajnuar duke p\u00ebrdorur disa mij\u00ebra or\u00eb me regjistrime z\u00ebrash n\u00eb m\u00eb shum\u00eb se 90 gjuh\u00eb. P\u00ebr ekzekutimin e modelit p\u00ebrdoret TensorFlow Lite. Performanca e implementimit t\u00eb propozuar \u00ebsht\u00eb mjaft e mir\u00eb p\u00ebr kodimin dhe dekodimin e t\u00eb folurit n\u00eb smartphone t\u00eb kategori t\u00eb ul\u00ebt t\u00eb \u00e7mimit. <\/p>\n
P\u00ebrve\u00e7 p\u00ebrdorimit t\u00eb nj\u00eb modeli gjenerativ t\u00eb ndrysh\u00ebm, versioni i ri gjithashtu shquhet p\u00ebr p\u00ebrfshirjen n\u00eb arkitektur\u00ebn e kodek\u00ebs lidhjesh me kuantizatorin RVQ (Residual Vector Quantizer), i realizuar nga ana e d\u00ebrguesit para transferimit t\u00eb t\u00eb dh\u00ebnave, nd\u00ebrsa nga ana e marr\u00ebsit pas pranimimit t\u00eb t\u00eb dh\u00ebnave. Kuantizatori konverton parametrat e dh\u00ebn\u00eb nga kodeku n\u00eb grupe paketash, duke koduar informacionin n\u00eb lidhje me bitratin e zgjedhur. P\u00ebr t\u00eb siguruar nivele t\u00eb ndryshme t\u00eb cil\u00ebsis\u00eb, jan\u00eb parashikuar kuantizator\u00eb p\u00ebr tre bitratet (3.2 kps, 6 kbps dhe 9.2 kbps); sa m\u00eb i lart\u00eb bitrati, aq m\u00eb e mir\u00eb cil\u00ebsia, por k\u00ebrkesa p\u00ebr band\u00eb m\u00eb t\u00eb lart\u00eb.
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Arkitektura e re ka lejuar uljen e vonesave t\u00eb transmetimit t\u00eb sinjalit nga 100 n\u00eb 20 milisekonda. N\u00eb krahasim, kodeku Opus p\u00ebr WebRTC demonstroi vonesa n\u00eb bitratet e testuara prej 26.5ms, 46.5ms dhe 66.5ms. Po ashtu, ka rritur ndjesh\u00ebm performanc\u00ebn e koduesit dhe dekoduesit \u2014 n\u00eb krahasim me versionin e kaluar, \u00ebsht\u00eb v\u00ebn\u00eb re nj\u00eb p\u00ebrmir\u00ebsim deri n\u00eb 5 her\u00eb. P\u00ebr shembull, n\u00eb smartphone-n Pixel 6 Pro, kodeku i ri kryen kodimin dhe dekodimin e nj\u00eb mostre 20-miliekond\u00ebshe p\u00ebr 0.57 ms, q\u00eb \u00ebsht\u00eb 35 her\u00eb m\u00eb shpejt se sa nevojitet p\u00ebr transmetim n\u00eb koh\u00eb reale. <\/p>\n
P\u00ebrve\u00e7 performanc\u00ebs, \u00ebsht\u00eb arritur gjithashtu nj\u00eb rritje n\u00eb cil\u00ebsin\u00eb e rikuperimit t\u00eb z\u00ebrit \u2014 sipas shkall\u00ebs MUSHRA, cil\u00ebsia e z\u00ebrit n\u00eb bitratet 3.2 kbps, 6 kbps dhe 9.2 kbps me p\u00ebrdorimin e kodekut Lyra V2 korrespondon me bitratet 10 kbps, 13 kbps dhe 14 kbps kur p\u00ebrdoret kodeku Opus. \n Burimi: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"
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