{"id":99675,"date":"2021-04-06T22:22:41","date_gmt":"2021-04-06T20:22:42","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/google-opublikoval-audiokodek-lyra-dlya-peredachi-rechi-pri-plohom-kachestve-svyazi"},"modified":"2021-04-06T22:22:41","modified_gmt":"2021-04-06T20:22:42","slug":"google-opublikoval-audiokodek-lyra-dlya-peredachi-rechi-pri-plohom-kachestve-svyazi","status":"publish","type":"post","link":"https:\/\/prohoster.info\/et\/blog\/news\/google-opublikoval-audiokodek-lyra-dlya-peredachi-rechi-pri-plohom-kachestve-svyazi","title":{"rendered":"Google avalikustas Lyra audiokoodeki, et edastada k\u00f5nesidet kehva \u00fchenduse korral.","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

\u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043f\u0440\u0435\u0434\u0441\u0442\u0430\u0432\u0438\u043b\u0430 \u043d\u043e\u0432\u044b\u0439 \u0430\u0443\u0434\u0438\u043e\u043a\u043e\u0434\u0435\u043a Lyra, \u043e\u043f\u0442\u0438\u043c\u0438\u0437\u0438\u0440\u043e\u0432\u0430\u043d\u043d\u044b\u0439 \u0434\u043b\u044f \u0434\u043e\u0441\u0442\u0438\u0436\u0435\u043d\u0438\u044f \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e\u0433\u043e \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0430 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0440\u0435\u0447\u0438 \u0434\u0430\u0436\u0435 \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u043e\u0447\u0435\u043d\u044c \u043c\u0435\u0434\u043b\u0435\u043d\u043d\u044b\u0445 \u043a\u0430\u043d\u0430\u043b\u043e\u0432 \u0441\u0432\u044f\u0437\u0438. \u041a\u043e\u0434 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0438 Lyra \u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 C++ \u0438 \u043e\u0442\u043a\u0440\u044b\u0442 \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0, \u043d\u043e \u0432 \u0447\u0438\u0441\u043b\u0435 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u043f\u0440\u043e\u043f\u0440\u0438\u0435\u0442\u0430\u0440\u043d\u0430\u044f \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 libsparse_inference.so \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u044f\u0434\u0440\u0430 \u0434\u043b\u044f \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439. \u041e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, \u0447\u0442\u043e \u043f\u0440\u043e\u043f\u0440\u0438\u0435\u0442\u0430\u0440\u043d\u0430\u044f \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 \u044f\u0432\u043b\u044f\u0435\u0442\u0441\u044f \u0432\u0440\u0435\u043c\u0435\u043d\u043d\u043e\u0439 — \u0432 \u0434\u0430\u043b\u044c\u043d\u0435\u0439\u0448\u0435\u043c Google \u043e\u0431\u0435\u0449\u0430\u0435\u0442 \u0440\u0430\u0437\u0440\u0430\u0431\u043e\u0442\u0430\u0442\u044c \u043e\u0442\u043a\u0440\u044b\u0442\u0443\u044e \u0437\u0430\u043c\u0435\u043d\u0443 \u0438 \u043e\u0431\u0435\u0441\u043f\u0435\u0447\u0438\u0442\u044c \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u043a\u0443 \u0440\u0430\u0437\u043b\u0438\u0447\u043d\u044b\u0445 \u043f\u043b\u0430\u0442\u0444\u043e\u0440\u043c. <\/p>\n

H\u00e4\u00e4ljandmete kvaliteedilt madalatel kiirusel \u00fcletab Lyra oluliselt traditsioonilisi kodekeid, mis kasutavad digitaalse signaalit\u00f6\u00f6tluse meetodeid. K\u00f5rge h\u00e4\u00e4lekvaliteedi saavutamiseks piiratud andmehulgaga koos tavap\u00e4raste helisurve meetodite ja signaalide muundamisega rakendab Lyra masin\u00f5ppel p\u00f5hinevat k\u00f5nemudelit, mis v\u00f5imaldab puuduvat teavet luua k\u00f5ne t\u00fc\u00fcpiliste omaduste p\u00f5hjal. Heligeneratsiooni mudel on koolitatud mitme tuhande tunni jooksul, kasutades \u00fcle 70 keele h\u00e4\u00e4lemeistreid.

\"Google<\/center> <\/p>\n

Kodek sisaldab kodeerijat ja dekodeerijat. Kodeerija toimimisalgoritm h\u00f5lmab h\u00e4\u00e4ljandmete parameetrite ekstraheerimist iga 40 millisekundi j\u00e4rel, nende pakkimist ja saatmist vastuv\u00f5tjale \u00fcle v\u00f5rgu. Andmete edastamiseks on piisav sidekanal kiirusel 3 kilobitti sekundis. Ekstraheeritud heliparameetrid h\u00f5lmavad logaritmilisi mel-spektriogramme, mis arvestavad k\u00f5ne energiaomadusi erinevates sagedusvahemikes ja on ette valmistatud arvestades inimk\u00f5rva kuulmisv\u00f5imet.

\"Google<\/center> <\/p>\n

Dekooder kasutab generatiivset mudelit, mis rekonstrueerib antud heli parameetrite p\u00f5hjal k\u00f5nesignaali. Arvutuskompleksuse v\u00e4hendamiseks on kasutusele v\u00f5etud kerge mudel, mis p\u00f5hineb rekurentsel n\u00e4rviv\u00f5rgul, olles variant s\u00f5namudeli WaveRNN mudelist, milles kasutatakse madalamat proovimise sagedust, kuid genereeritakse samaaegselt mitu signaali erinevates sagedusvahemikes. Saadud signaalid liidetakse seej\u00e4rel, et saada ainus v\u00e4ljundsignaal, mis vastab soovitud diskreetimise sagedusele. <\/p>\n

Kiirendamiseks on rakendatud ka spetsialiseeritud protsessorijuhiseid, mis on saadaval 64-bitistes ARM-protsessorites. Selle tulemusena suudab Lyra koodek, hoolimata masin\u00f5ppe kasutamisest, kodeerida ja dekodeerida k\u00f5net reaalajas keskmise hinnaklassi nutitelefonides, n\u00e4idates signaali edastamise hilinemist 90 millisekundi tasemel.
\n
Allikas: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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\u043d\u0430\u043f\u0438\u0441\u0430\u043d \u043d\u0430 C++ \u0438 \u043e\u0442\u043a\u0440\u044b\u0442 \u043f\u043e\u0434 \u043b\u0438\u0446\u0435\u043d\u0437\u0438\u0435\u0439 Apache 2.0, \u043d\u043e \u0432 \u0447\u0438\u0441\u043b\u0435 \u043d\u0435\u043e\u0431\u0445\u043e\u0434\u0438\u043c\u044b\u0445 \u0434\u043b\u044f \u0440\u0430\u0431\u043e\u0442\u044b \u0437\u0430\u0432\u0438\u0441\u0438\u043c\u043e\u0441\u0442\u0435\u0439 \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u043f\u0440\u043e\u043f\u0440\u0438\u0435\u0442\u0430\u0440\u043d\u0430\u044f \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0430 libsparse_inference.so \u0441 \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u0435\u0439 \u044f\u0434\u0440\u0430 \u0434\u043b\u044f \u043c\u0430\u0442\u0435\u043c\u0430\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0445 \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439. \u041e\u0442\u043c\u0435\u0447\u0430\u0435\u0442\u0441\u044f, 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