{"id":139748,"date":"2025-07-27T23:11:57","date_gmt":"2025-07-27T21:11:57","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-svt-av1-3-1-0-kodirovshhika-dlya-formata-video-av1"},"modified":"2025-07-27T23:11:57","modified_gmt":"2025-07-27T21:11:57","slug":"vypusk-svt-av1-3-1-0-kodirovshhika-dlya-formata-video-av1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/vypusk-svt-av1-3-1-0-kodirovshhika-dlya-formata-video-av1","title":{"rendered":"Vydanie SVT-AV1 3.1.0, k\u00f3dova\u010da pre form\u00e1t videa AV1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bol chv\u00e1len\u00fd vydanie kni\u017enice SVT-AV1 3.1.0 (Scalable Video Technology AV1) s implement\u00e1ciami k\u00f3dova\u010da a dek\u00f3dova\u010da form\u00e1tu k\u00f3dovania videa AV1, pri\u010dom pri jeho zr\u00fdchlen\u00ed sa vyu\u017e\u00edvaj\u00fa hardv\u00e9rov\u00e9 paraleln\u00e9 v\u00fdpo\u010dtov\u00e9 roz\u0161\u00edrenia pr\u00edtomn\u00e9 v procesoroch x86_64 a ARM. Projekt bol vytvoren\u00fd spolo\u010dnos\u0165ou Intel v partnerstve s Netflixom s cie\u013eom dosiahnu\u0165 \u00farove\u0148 v\u00fdkonu vhodn\u00e9ho na real-time prekodovanie videa a aplik\u00e1ciu v slu\u017eb\u00e1ch na vy\u017eiadanie (VOD). V s\u00fa\u010dasnosti sa v\u00fdvoj vedie pod z\u00e1\u0161titou aliancie Open Media (AOMedia), ktor\u00e1 dohliada na rozvoj form\u00e1tu k\u00f3dovania videa AV1. Predt\u00fdm bol projekt rozv\u00edjan\u00fd v r\u00e1mci projektu OpenVisualCloud, ktor\u00fd takisto vyv\u00edja k\u00f3dova\u010de SVT-HEVC a SVT-VP9. K\u00f3d je distribuovan\u00fd pod licenciou BSD.     <\/p>\n<p>SVT-AV1 m\u00f4\u017ee by\u0165 zostaven\u00fd pre syst\u00e9my na b\u00e1ze ak\u00fdchko\u013evek architekt\u00far, pre ktor\u00e9 je k dispoz\u00edcii kompil\u00e1tor s podporou \u0161tandardu C99, av\u0161ak najlep\u0161ia v\u00fdkonnos\u0165 sa dosahuje na syst\u00e9moch x86_64, kde sa pou\u017e\u00edvaj\u00fa assemblerov\u00e9 optimaliz\u00e1cie na b\u00e1ze in\u0161trukci\u00ed SIMD (preferovane, aby CPU podporovalo AVX2, ale minim\u00e1lne sta\u010d\u00ed SSE2). Spotreba pam\u00e4te z\u00e1vis\u00ed od po\u010dtu procesorov\u00fdch jadier zapojen\u00fdch do k\u00f3dovania, regulovan\u00fdch vo\u013ebou &#171;&#8212;lp&#187;. Kv\u00f4li zlo\u017eitosti algoritmov v AV1 si k\u00f3dovanie tohto form\u00e1tu vy\u017eaduje podstatne viac zdrojov ako pre in\u00e9 form\u00e1ty, napr\u00edklad \u0161tandardn\u00fd k\u00f3dova\u010d z projektu AV1 vy\u017eaduje 5721, 5869 a 658-kr\u00e1t viac v\u00fdpo\u010dtov v porovnan\u00ed s k\u00f3dova\u010dmi x264 (profil &#171;main&#187;), x264 (profil &#171;high&#187;) a libvpx-vp9.     <\/p>\n<p>Medzi zmenami v novom vydan\u00ed SVT-AV1:  <\/p>\n<ul>\n<li class=\"l\"> Optimizovali sme kompromisy medzi kvalitou a r\u00fdchlos\u0165ou pre predvo\u013eby, ktor\u00e9 nastavuj\u00fa stredn\u00fa a vysok\u00fa \u00farove\u0148 kvality. V re\u017eime &#171;fast-decode 0&#187; pre predvo\u013eby M1-M5 sa r\u00fdchlos\u0165 zv\u00fd\u0161ila o 15-25% pri zachovan\u00ed \u00farovne kvality. V re\u017eimoch fast-decode 1 a 2 pre predvo\u013eby M3-M7 sa r\u00fdchlos\u0165 zv\u00fd\u0161ila o 15-20% pri zachovan\u00ed \u00farovne kvality. Pre predvo\u013eby M0 a MR sa \u00farove\u0148 kvality zv\u00fd\u0161ila pribli\u017ene o 1-1,5% pri hodnoten\u00ed pomocou met\u00f3dy BD-Rate (Bjontegaard-Delta).\n<li class=\"l\"> V\u00fdrazne bola zlep\u0161en\u00e1 funkcia k\u00f3dovania s n\u00edzkou latenciou (Low Delay).\n<li class=\"l\"> V\u00fdkon v re\u017eime RTC bol zv\u00fd\u0161en\u00fd o 5-10%.\n<li class=\"l\"> Na syst\u00e9moch ARM bola pou\u017eit\u00e1 optimaliz\u00e1cia na z\u00e1klade roz\u0161\u00edren\u00ed Neon a SVE2, \u010do umo\u017enilo zv\u00fd\u0161i\u0165 v\u00fdkon k\u00f3dovania streamov v n\u00edzkych rozl\u00ed\u0161eniach s vysokou h\u013abkou farieb o 5%.\n<li class=\"l\"> Na syst\u00e9moch ARM je zv\u00fd\u0161en\u00fd v\u00fdkon k\u00f3dovania videa v krajinnom (1080p +4%, 720p +6%, 480p: +6%, 360p: +3%, 240p: +4%) a portr\u00e9tnom (1080p +8%, 720p +4%, 480p +3%, 360p +7%, 240p +4%) re\u017eime.\n<li class=\"l\"> V re\u017eime n\u00e1hodn\u00e9ho pr\u00edstupu bola implementovan\u00e1 podpora S-sn\u00edmok.\n<li class=\"l\"> Z forku SVT-AV1-SPY bola prenesen\u00e1 implement\u00e1cia zna\u010diek &#171;&#8212;chroma-qm-min&#187; a &#171;&#8212;chroma-qm-max&#187;, ako aj boli prenesen\u00e9 vylep\u0161enia t\u00fdkaj\u00face sa Variance Boost (implement\u00e1cia algoritmu adapt\u00edvneho kvantovania VAQ).\n<li class=\"l\"> V re\u017eime RTC s\u00fa zahrnut\u00e9 predvo\u013eby M11 a M12.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=63637\">opennet.ru<\/a> <\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 SVT-AV1 3.1.0 (Scalable Video Technology AV1) c \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f\u043c\u0438 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0438 \u0434\u0435\u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0444\u043e\u0440\u043c\u0430\u0442\u0430 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u0438\u0434\u0435\u043e AV1, \u0434\u043b\u044f \u0443\u0441\u043a\u043e\u0440\u0435\u043d\u0438\u044f \u043a\u043e\u0442\u043e\u0440\u044b\u0445 \u0437\u0430\u0434\u0435\u0439\u0441\u0442\u0432\u043e\u0432\u0430\u043d\u044b \u043f\u0440\u0438\u0441\u0443\u0442\u0441\u0442\u0432\u0443\u044e\u0449\u0438\u0435 \u0432 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430\u0445 x86_64 \u0438 ARM \u0440\u0430\u0441\u0448\u0438\u0440\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u0430\u043f\u043f\u0430\u0440\u0430\u0442\u043d\u043e\u0433\u043e \u0440\u0430\u0441\u043f\u0430\u0440\u0430\u043b\u043b\u0435\u043b\u0438\u0432\u0430\u043d\u0438\u044f \u0432\u044b\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439. \u041f\u0440\u043e\u0435\u043a\u0442 \u0441\u043e\u0437\u0434\u0430\u043d \u043a\u043e\u043c\u043f\u0430\u043d\u0438\u0435\u0439 Intel \u0432 \u043f\u0430\u0440\u0442\u043d\u0451\u0440\u0441\u0442\u0432\u0435 \u0441 Netflix \u0441 \u0446\u0435\u043b\u044c\u044e \u0434\u043e\u0441\u0442\u0438\u0436\u0435\u043d\u0438\u044f \u0443\u0440\u043e\u0432\u043d\u044f \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u043e\u0441\u0442\u0438, \u043f\u0440\u0438\u0433\u043e\u0434\u043d\u043e\u0433\u043e \u0434\u043b\u044f \u043f\u0435\u0440\u0435\u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f \u0432\u0438\u0434\u0435\u043e \u043d\u0430 \u043b\u0435\u0442\u0443 \u0438 \u043f\u0440\u0438\u043c\u0435\u043d\u0435\u043d\u0438\u044f \u0432 [&hellip;]<\/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-139748","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.4 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041e\u043f\u0443\u0431\u043b\u0438\u043a\u043e\u0432\u0430\u043d \u0432\u044b\u043f\u0443\u0441\u043a \u0431\u0438\u0431\u043b\u0438\u043e\u0442\u0435\u043a\u0438 SVT-AV1 3.1.0 (Scalable Video Technology AV1) c \u0440\u0435\u0430\u043b\u0438\u0437\u0430\u0446\u0438\u044f\u043c\u0438 \u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0438 \u0434\u0435\u043a\u043e\u0434\u0438\u0440\u043e\u0432\u0449\u0438\u043a\u0430 \u0444\u043e\u0440\u043c\u0430\u0442\u0430 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