A Google lan\u00e7ou a vers\u00e3o 1.3 do codec de \u00e1udio Lyra, focada em alcan\u00e7ar alta qualidade na transmiss\u00e3o de voz com uma quantidade limitada de dados. A qualidade da voz em taxas de bits de 3.2 kbps, 6 kbps e 9.2 kbps utilizando o codec Lyra corresponde aproximadamente \u00e0s taxas de bits de 10 kbps, 13 kbps e 14 kbps com o codec Opus. Para atingir esse objetivo, al\u00e9m dos m\u00e9todos tradicionais de compress\u00e3o de \u00e1udio e transforma\u00e7\u00e3o de sinais, o Lyra utiliza um modelo de fala baseado em um sistema de aprendizado de m\u00e1quina, permitindo recriar informa\u00e7\u00f5es faltantes com base nas caracter\u00edsticas t\u00edpicas da fala. A implementa\u00e7\u00e3o de refer\u00eancia do c\u00f3digo \u00e9 escrita em C++ e \u00e9 distribu\u00edda sob a licen\u00e7a Apache 2.0. <\/p>\n
Ao contr\u00e1rio da vers\u00e3o Lyra 1.2 amplamente reformulada lan\u00e7ada em outubro, que foi reestruturada para uma nova arquitetura de rede neural, a vers\u00e3o 1.3 passou por uma otimiza\u00e7\u00e3o do modelo de aprendizado de m\u00e1quina sem altera\u00e7\u00f5es na arquitetura. Na nova vers\u00e3o, para armazenar pesos e realizar opera\u00e7\u00f5es aritm\u00e9ticas, foram utilizados inteiros de 8 bits em vez de n\u00fameros de ponto flutuante de 32 bits, resultando em uma redu\u00e7\u00e3o de 43% no tamanho do modelo e um aumento de 20% na efici\u00eancia do modelo durante os testes no smartphone Pixel 6 Pro. A qualidade da fala foi mantida no mesmo n\u00edvel, mas o formato dos dados transmitidos foi alterado e n\u00e3o \u00e9 compat\u00edvel com vers\u00f5es anteriores. \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\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\udd47Atualiza\u00e7\u00e3o do codec de \u00e1udio aberto Lyra 1.3 | ProHoster","description":"A Google lan\u00e7ou a vers\u00e3o 1.3 do codec de \u00e1udio Lyra, focada em alcan\u00e7ar alta qualidade na transmiss\u00e3o de voz com uma quantidade limitada de 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Fonte: opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"