{"id":122071,"date":"2025-02-23T14:22:11","date_gmt":"2025-02-23T12:22:11","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novosti-interneta\/vypusk-svt-av1-3-0-kodirovshhika-dlya-formata-video-av1"},"modified":"2025-02-23T14:22:11","modified_gmt":"2025-02-23T12:22:11","slug":"vypusk-svt-av1-3-0-kodirovshhika-dlya-formata-video-av1","status":"publish","type":"post","link":"https:\/\/prohoster.info\/sk\/blog\/news\/vypusk-svt-av1-3-0-kodirovshhika-dlya-formata-video-av1","title":{"rendered":"Vydanie SVT-AV1 3.0, kodek pre form\u00e1t videa AV1","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Bolo zverejnen\u00e9 vydanie kni\u017enice SVT-AV1 3.0 (Scalable Video Technology AV1) s implement\u00e1ciami kodeku a dekod\u00e9ru form\u00e1tu k\u00f3dovania videa AV1, ktor\u00e9ho r\u00fdchlos\u0165 je ur\u00fdchlen\u00e1 prostriedkami hardv\u00e9rovej paraleliz\u00e1cie v\u00fdpo\u010dtov s\u00fa\u010dasn\u00fdch procesorov Intel. Projekt vytvorila spolo\u010dnos\u0165 Intel v partnerstve s Netflixom s cie\u013eom dosiahnu\u0165 v\u00fdkon vhodn\u00fd na presk\u00fa\u0161anie videa za behu a jeho pou\u017eitie v slu\u017eb\u00e1ch VOD (video na po\u017eiadanie). V s\u00fa\u010dasnosti sa v\u00fdvoj uskuto\u010d\u0148uje pod z\u00e1\u0161titou aliancie Open Media (AOMedia), ktor\u00e1 dohliada na v\u00fdvoj form\u00e1tu k\u00f3dovania videa AV1. Predt\u00fdm projekt prebiehal v r\u00e1mci projektu OpenVisualCloud, ktor\u00fd taktie\u017e vyv\u00edja kodeky 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 zalo\u017een\u00e9 na ak\u00fdchko\u013evek architekt\u00farach, pre ktor\u00e9 je k dispoz\u00edcii kompil\u00e1tor s podporou \u0161tandardu C99, ale najlep\u0161ie v\u00fdkony sa dosahuj\u00fa na syst\u00e9moch x86_64, kde sa pou\u017e\u00edvaj\u00fa assemblerov\u00e9 optimaliz\u00e1cie na b\u00e1ze in\u0161trukci\u00ed SIMD (odpor\u00fa\u010dan\u00e1 podpora AVX2 v CPU, ale minim\u00e1lne je dostato\u010dn\u00e9 aj SS2). Spotreba pam\u00e4te z\u00e1vis\u00ed od po\u010dtu procesorov\u00fdch jadier pou\u017eit\u00fdch pri k\u00f3dovan\u00ed, regulovan\u00fdch vo\u013ebou &#171;&#8212;lp&#187;. Vzh\u013eadom na zlo\u017eenie algoritmov pou\u017eit\u00fdch v AV1 si tento form\u00e1t vy\u017eaduje podstatne viac zdrojov ako in\u00e9 form\u00e1ty, napr\u00edklad \u0161tandardn\u00fd kod\u00e9r z projektu AV1 vy\u017eaduje o 5721, 5869 a 658 viac v\u00fdpo\u010dtov v porovnan\u00ed s kod\u00e9rmi 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\"> Bola vykonan\u00e1 optimaliz\u00e1cia kompromisov kvalita\/r\u00fdchlos\u0165 pre predvo\u013eby, ktor\u00e9 nastavuj\u00fa stredn\u00fa a vysok\u00fa \u00farove\u0148 kvality. V re\u017eime &#171;fast-decode 2&#187; pre predvo\u013eby M3-M10 sa r\u00fdchlos\u0165 zv\u00fd\u0161ila o 15-25% pri zachovan\u00ed \u00farovne kvality. Pre predvo\u013eby M0-M2 sa \u00farove\u0148 kvality zv\u00fd\u0161ila pribli\u017ene o 1% pri hodnoten\u00ed met\u00f3dou BD-Rate (Bjontegaard-Delta).\n<li class=\"l\"> V re\u017eime &#171;fast-decode 1&#187; v porovnan\u00ed s &#171;fast-decode 0&#187; sa podarilo zn\u00ed\u017ei\u0165 po\u010det cyklov dek\u00f3dovania pribli\u017ene o 10% pri zv\u00fd\u0161en\u00ed str\u00e1t len o 1% pod\u013ea metriky BD-Rate.\n<li class=\"l\"> Na syst\u00e9moch ARM s\u00fa vyu\u017eit\u00e9 optimaliz\u00e1cie s pou\u017eit\u00edm roz\u0161\u00edren\u00ed Neon a SVE2, \u010do umo\u017enilo zv\u00fd\u0161i\u0165 v\u00fdkon k\u00f3dovania streamov s vysokou h\u013abkou farby a rozl\u00ed\u0161en\u00edm 480p-1080p o 10-25%.\n<li class=\"l\"> Z forku SVT-AV1-SPY boli prenesen\u00e9 zmeny zlep\u0161uj\u00face vn\u00edmanie kvality pri pou\u017eit\u00ed re\u017eimu &#171;tune 0&#187;.\n<li class=\"l\"> Bol pridan\u00fd re\u017eim &#171;avif&#187;, ktor\u00fd spotrebuje menej zdrojov pri k\u00f3dovan\u00ed statick\u00fdch obrazov.\n<li class=\"l\"> Vylep\u0161en\u00e9 unit testy pre k\u00f3d, ktor\u00fd pou\u017e\u00edva in\u0161trukcie Arm Neon a SVE2.    <\/ul>\n<p>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/www.opennet.ru\/opennews\/art.shtml?num=62781\">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 3.0 (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 \u0441\u043e\u0432\u0440\u0435\u043c\u0435\u043d\u043d\u044b\u0445 CPU Intel \u0441\u0440\u0435\u0434\u0441\u0442\u0432\u0430 \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 \u0441\u0435\u0440\u0432\u0438\u0441\u0430\u0445, \u043e\u0442\u0434\u0430\u044e\u0449\u0438\u0445 [&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-122071","post","type-post","status-publish","format-standard","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One 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