La soci\u00e9t\u00e9 Google a publi\u00e9 la version 1.3 de l\u2019audiocodec Lyra, visant \u00e0 atteindre une haute qualit\u00e9 de transmission vocale dans un contexte de faible bande passante. La qualit\u00e9 de la voix \u00e0 des d\u00e9bits de 3,2 kbps, 6 kbps et 9,2 kbps utilisant le codec Lyra correspond \u00e0 peu pr\u00e8s aux d\u00e9bits de 10 kbps, 13 kbps et 14 kbps avec le codec Opus. Pour atteindre cet objectif, en plus des m\u00e9thodes de compression audio et de transformation des signaux, Lyra utilise un mod\u00e8le vocal bas\u00e9 sur un syst\u00e8me d'apprentissage automatique, permettant de recr\u00e9er les informations manquantes en se basant sur les caract\u00e9ristiques typiques de la parole. L\u2019impl\u00e9mentation de r\u00e9f\u00e9rence est \u00e9crite en C++ et est diffus\u00e9e sous la licence Apache 2.0. <\/p>\n
Contrairement \u00e0 la version 1.2 de Lyra, compl\u00e8tement repens\u00e9e et lanc\u00e9e en octobre, qui a \u00e9t\u00e9 adapt\u00e9e \u00e0 une nouvelle architecture de r\u00e9seau de neurones, la version 1.3 a optimis\u00e9 le mod\u00e8le d'apprentissage automatique sans modifications architecturales. Dans cette nouvelle version, pour le stockage des poids et l'ex\u00e9cution des op\u00e9rations arithm\u00e9tiques, des entiers 8 bits ont \u00e9t\u00e9 utilis\u00e9s \u00e0 la place de nombres \u00e0 virgule flottante de 32 bits, ce qui a entra\u00een\u00e9 une r\u00e9duction de la taille du mod\u00e8le de 43 % et une am\u00e9lioration des performances de 20 % lors des tests sur le smartphone Pixel 6 Pro. La qualit\u00e9 de la parole a \u00e9t\u00e9 maintenue au m\u00eame niveau, mais le format des donn\u00e9es transmises a chang\u00e9 et n'est pas compatible avec les versions pr\u00e9c\u00e9dentes. \u041a\u043e\u043c\u043f\u0430\u043d\u0438\u044f Google \u043e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043b\u0430 \u0432\u044b\u043f\u0443\u0441\u043a \u0430\u0443\u0434\u0438\u043e\u043a\u043e\u0434\u0435\u043a\u0430 Lyra 1.3, \u043d\u0430\u0446\u0435\u043b\u0435\u043d\u043d\u043e\u0433\u043e \u0434\u043e\u0441\u0442\u0438\u0436\u0435\u043d\u0438\u0435 \u0432\u044b\u0441\u043e\u043a\u043e\u0433\u043e \u043a\u0430\u0447\u0435\u0441\u0442\u0432\u0430 \u043f\u0435\u0440\u0435\u0434\u0430\u0447\u0438 \u0433\u043e\u043b\u043e\u0441\u0430 \u0432 \u0443\u0441\u043b\u043e\u0432\u0438\u044f\u0445 \u043e\u0433\u0440\u0430\u043d\u0438\u0447\u0435\u043d\u043d\u043e\u0433\u043e \u043e\u0431\u044a\u0451\u043c\u0430 \u043f\u0435\u0440\u0435\u0434\u0430\u0432\u0430\u0435\u043c\u043e\u0439 \u0438\u043d\u0444\u043e\u0440\u043c\u0430\u0446\u0438\u0438. \u041a\u0430\u0447\u0435\u0441\u0442\u0432\u043e \u0440\u0435\u0447\u0438 \u043d\u0430 \u0431\u0438\u0442\u0440\u0435\u0439\u0442\u0430\u0445 3.2 kbps, 6 kbps \u0438 9.2 kbps \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u043a\u043e\u0434\u0435\u043a\u0430 Lyra \u043f\u0440\u0438\u043c\u0435\u0440\u043d\u043e \u0441\u043e\u043e\u0442\u0432\u0435\u0442\u0441\u0442\u0432\u0443\u0435\u0442 \u0431\u0438\u0442\u0440\u0435\u0439\u0442\u0430\u043c 10 kbps, 13 kbps \u0438 14 kbps \u043f\u0440\u0438 \u0438\u0441\u043f\u043e\u043b\u044c\u0437\u043e\u0432\u0430\u043d\u0438\u0438 \u043a\u043e\u0434\u0435\u043a\u0430 Opus. \u0414\u043b\u044f \u0440\u0435\u0448\u0435\u043d\u0438\u044f \u043f\u043e\u0441\u0442\u0430\u0432\u043b\u0435\u043d\u043d\u043e\u0439 \u0437\u0430\u0434\u0430\u0447\u0438 \u043f\u043e\u043c\u0438\u043c\u043e \u043e\u0431\u044b\u0447\u043d\u044b\u0445 \u043c\u0435\u0442\u043e\u0434\u043e\u0432 […]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-105529","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t\n\t\n\t\n\t\n\t\n\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\t\t\n\n","aioseo_head_json":{"title":"\ud83e\udd47Mise \u00e0 jour de l\u2019audiocodec open source Lyra 1.3 | ProHoster","description":"La soci\u00e9t\u00e9 Google a publi\u00e9 la version 1.3 de l\u2019audiocodec Lyra, visant \u00e0 atteindre une haute qualit\u00e9 de transmission vocale dans un contexte de faible bande 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Source : opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"