Google ha pubblicato la versione 1.3 del codec audio Lyra, progettato per garantire un'alta qualit\u00e0 nella trasmissione della voce anche in condizioni di limitata larghezza di banda. La qualit\u00e0 vocale a bitrate di 3.2 kbps, 6 kbps e 9.2 kbps utilizzando il codec Lyra corrisponde approssimativamente ai bitrate di 10 kbps, 13 kbps e 14 kbps del codec Opus. Per affrontare questa sfida, oltre ai metodi convenzionali di compressione audio e di elaborazione dei segnali, Lyra utilizza un modello vocale basato su un sistema di apprendimento automatico, in grado di ricostruire le informazioni mancanti sulla base delle caratteristiche tipiche della voce. L'implementazione di riferimento del codice \u00e8 scritta in C++ e distribuita con licenza Apache 2.0. <\/p>\n
A differenza della versione 1.2 di Lyra, completamente riprogettata e rilasciata a ottobre con una nuova architettura di rete neurale, la versione 1.3 ha visto un'ottimizzazione del modello di apprendimento automatico senza modifiche architetturali. Nella nuova versione, per il salvataggio dei pesi e l'esecuzione delle operazioni aritmetiche, sono stati utilizzati numeri interi a 8 bit al posto dei numeri in virgola mobile a 32 bit, portando a una riduzione del 43% delle dimensioni del modello e a un'accelerazione delle prestazioni del 20% nei test su smartphone Pixel 6 Pro. La qualit\u00e0 vocale \u00e8 stata mantenuta a livelli simili, ma il formato dei dati trasmessi \u00e8 cambiato e non \u00e8 compatibile con le versioni precedenti. \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\udd47 Aggiornamento del codec audio open source Lyra 1.3 | ProHoster","description":"Google ha pubblicato la versione 1.3 del codec audio Lyra, progettato per raggiungere un'alta qualit\u00e0 nella trasmissione vocale anche in condizioni di informazioni 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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"