{"id":11314,"date":"2024-06-06T00:29:46","date_gmt":"2024-06-05T21:29:46","guid":{"rendered":"https:\/\/global.tab-tv.com\/sk\/?p=11314"},"modified":"2024-06-06T00:29:48","modified_gmt":"2024-06-05T21:29:48","slug":"problem-s-blikanim-vrr-v-tv-a-monitoroch","status":"publish","type":"post","link":"https:\/\/global.tab-tv.com\/sk\/problem-s-blikanim-vrr-v-tv-a-monitoroch\/","title":{"rendered":"Probl\u00e9m s blikan\u00edm VRR v TV a monitoroch"},"content":{"rendered":"\n

Probl\u00e9m blikania monitora alebo telev\u00edzora v dynamick\u00fdch hr\u00e1ch pri n\u00e1hlej zmene sn\u00edmkovej frekvencie na vstupe HDMI je pretrv\u00e1vaj\u00facim probl\u00e9mom od n\u00e1stupu technol\u00f3gie VRR (Variable Refresh Rate) implementovanej v portoch HDMI 2.1. Tento probl\u00e9m pred zaveden\u00edm technol\u00f3gie VRR neexistoval, \u010do nazna\u010duje, \u017ee blikanie s\u00favis\u00ed s prisp\u00f4soben\u00edm displejov premenliv\u00fdm frekvenci\u00e1m. Vysvetl\u00edm, pre\u010do k blikaniu doch\u00e1dza a \u010di je mo\u017en\u00e9 urobi\u0165 nie\u010do na jeho zn\u00ed\u017eenie<\/p>\n\n\n\n

Pr\u00ed\u010dina blikania pri prev\u00e1dzke VRR<\/strong><\/h2>\n\n\n\n

Podstata blikania vypl\u00fdva z technol\u00f3gie zmeny frekvencie zobrazenia. Pred pr\u00edchodom VRR (variabiln\u00e1 obnovovacia frekvencia) bol monitor pripojen\u00fd ku grafickej karte s podporovanou, stabilnou frekvenciou 60, 120 alebo 144 Hz. T\u00e1to frekvencia sa po\u010das prev\u00e1dzky nemenila. Grafick\u00e1 karta vytv\u00e1rala sn\u00edmky pri frekvencii, ktor\u00fa zvl\u00e1dala. Ak napr\u00edklad pri pripojen\u00ed HDMI s frekvenciou 120 Hz klesla sn\u00edmkov\u00e1 frekvencia po\u010das hrania na 50 Hz, nast\u00fapili technol\u00f3gie ako FreeSync alebo G-Sync. V takom pr\u00edpade monitor nebude prij\u00edma\u0165 dostatok sn\u00edmok a jednoducho zdvojn\u00e1sob\u00ed dostupn\u00e9 sn\u00edmky, niektor\u00e9 sn\u00edmky sa zobrazia dvakr\u00e1t za sebou a niektor\u00e9 trikr\u00e1t. Celkov\u00e1 frekvencia synchroniz\u00e1cie cez HDMI v\u0161ak zostala stabiln\u00e1.<\/p>\n\n\n\n

Tu je mo\u017en\u00e9 demon\u0161trova\u0165 princ\u00edp zobrazovania videa cez HDMI:<\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n
    \n
  • Video sa do portu HDMI priv\u00e1dza z hernej konzoly.<\/li>\n\n\n\n
  • Ak m\u00e1 v\u00e1\u0161 monitor alebo telev\u00edzor viacero portov HDMI, pou\u017e\u00edva \u010dip na prep\u00ednanie vstupov HDMI.<\/li>\n\n\n\n
  • Video pr\u00fad vstupuje do procesora, ktor\u00fd obsahuje dekod\u00e9r HDMI, a spracov\u00e1va ho integrovan\u00fd grafick\u00fd procesor.<\/li>\n\n\n\n
  • Spracovan\u00fd videopr\u00fad ide do dosky T-CON (Timing Controller), ktor\u00e1 ovl\u00e1da zobrazenie.<\/li>\n\n\n\n
  • Obraz sa zobraz\u00ed na obrazovke.<\/li>\n<\/ul>\n\n\n\n

    Ke\u010f bola technol\u00f3gia VRR predstaven\u00e1, my\u0161lienka bola s\u013eubn\u00e1: prisp\u00f4sobi\u0165 obnovovaciu frekvenciu monitora sn\u00edmkovej frekvencii grafickej karty, \u010d\u00edm sa zlep\u0161\u00ed hern\u00fd z\u00e1\u017eitok t\u00fdm, \u017ee bude realistickej\u0161\u00ed a dynamickej\u0161\u00ed. V\u00fdrobcovia monitorov v\u0161ak na t\u00fato zmenu neboli \u00faplne pripraven\u00ed. Po implement\u00e1cii VRR zistili, \u017ee monitory zle reaguj\u00fa na v\u00fdrazn\u00e9 zmeny frekvencie, \u010do vedie k blikaniu. Blikanie sa zase vyskytuje v dvoch hlavn\u00fdch scen\u00e1roch:<\/p>\n\n\n\n

    Blikanie pri poklese frekvencie pod 48 Hz<\/strong><\/h3>\n\n\n\n

    Monitory s VRR zvy\u010dajne podporuj\u00fa minim\u00e1lnu frekvenciu 48 Hz. Je to z\u00e1mern\u00e9, preto\u017ee ke\u010f sa sn\u00edmky menia pri ni\u017e\u0161ej frekvencii, niektor\u00ed \u013eudia m\u00f4\u017eu zaznamena\u0165 blikanie. \u0160tyridsa\u0165osem sn\u00edmok za sekundu je minimum, pri ktorom sa video pohodlne sleduje. Ke\u010f frekvencia sn\u00edmok klesne pod 48 Hz, aktivuje sa re\u017eim FreeSync, \u010do sp\u00f4sob\u00ed, \u017ee jeden sn\u00edmok prijat\u00fd z konzoly sa zobraz\u00ed dvakr\u00e1t. V tomto momente doch\u00e1dza k blikaniu, preto\u017ee doska T-CON (Timing Controller) sa prepne do in\u00e9ho re\u017eimu, \u010d\u00edm sa zmen\u00ed synchroniz\u00e1cia sn\u00edmkovej frekvencie.<\/p>\n\n\n\n

    Blikanie pri n\u00e1hlom poklese frekvencie na 48 Hz<\/strong><\/h3>\n\n\n\n

    V tomto scen\u00e1ri sa obrazovka sna\u017e\u00ed prisp\u00f4sobi\u0165 n\u00e1hlemu poklesu frekvencie. Ak je napr\u00edklad potrebn\u00e9 r\u00fdchlo zmeni\u0165 obnovovaciu frekvenciu zo 144 Hz na 60 Hz, procesor a displej, najm\u00e4 tie s priemern\u00fdm v\u00fdkonom, sa nemusia synchronizova\u0165 hladko. To m\u00f4\u017ee sp\u00f4sobi\u0165 kr\u00e1tky odlesk alebo biely z\u00e1blesk na obrazovke, ktor\u00fd indikuje chv\u00ed\u013ekov\u00fd nedostatok synchroniz\u00e1cie pri zmene frekvencie zobrazenia.<\/p>\n\n\n\n

    Ktor\u00e9 displeje s\u00fa najcitlivej\u0161ie na blikanie<\/strong><\/h2>\n\n\n\n

    Existuj\u00fa teda displeje OLED, VA, IPS a TN. Prax uk\u00e1zala, \u017ee najcitlivej\u0161ie na blikanie s\u00fa monitory OLED a VA a existuje na to vysvetlenie.<\/p>\n\n\n\n

      \n
    • Monitory OLED – maj\u00fa ve\u013emi kr\u00e1tku dobu odozvy, tak\u017ee ve\u013emi r\u00fdchlo reaguj\u00fa na ak\u00e9ko\u013evek zmeny a pri prep\u00ednan\u00ed re\u017eimov prev\u00e1dzky m\u00e1me \u010das vidie\u0165 blikanie.<\/li>\n\n\n\n
    • Monitory VA – maj\u00fa tie\u017e pomerne vysok\u00fd \u010das odozvy, ktor\u00fd tie\u017e umo\u017e\u0148uje zaznamena\u0165 prep\u00ednanie re\u017eimov prev\u00e1dzky.<\/li>\n\n\n\n
    • Monitory IPS – maj\u00fa cite\u013ene dlh\u0161iu dobu odozvy, pri zmene re\u017eimu prev\u00e1dzky si blikanie jednoducho nestihneme v\u0161imn\u00fa\u0165.<\/li>\n\n\n\n
    • TN monitory – maj\u00fa n\u00edzku dobu odozvy, ale n\u00edzku kvalitu farieb, preto sa vyr\u00e1baj\u00fa ako kancel\u00e1rske monitory a na hranie sa prakticky nepou\u017e\u00edvaj\u00fa<\/li>\n<\/ul>\n\n\n\n

      Oprava blikania v monitoroch a telev\u00edzoroch<\/strong><\/h2>\n\n\n\n

      Existuje len jeden sp\u00f4sob, ako zn\u00ed\u017ei\u0165 blikanie – nastavi\u0165 minim\u00e1lnu frekvenciu nad 48 Hz alebo vypn\u00fa\u0165 re\u017eim VRR. V\u00fdrobcovia monitorov sa, samozrejme, sna\u017eia zn\u00ed\u017ei\u0165 blikanie prostredn\u00edctvom softv\u00e9ru, \u010d\u00edm v podstate programovo obmedzuj\u00fa mo\u017enosti VRR.<\/p>\n\n\n\n

      Pozornos\u0165 venujte aj kvalite panelu a v\u00fdkonu monitora. Ak je kvalita panela n\u00edzka alebo m\u00e1 monitor m\u00e1lo v\u00fdkonn\u00fd procesor, jedin\u00fdm sp\u00f4sobom elimin\u00e1cie blikania bude pravdepodobne \u00fapln\u00e9 vypnutie VRR. Vo v\u00e4\u010d\u0161ine pr\u00edpadov je vypnutie VRR jedin\u00fdm sp\u00f4sobom odstr\u00e1nenia blikania<\/p>\n","protected":false},"excerpt":{"rendered":"

      Probl\u00e9m blikania monitora alebo telev\u00edzora v dynamick\u00fdch hr\u00e1ch pri n\u00e1hlej zmene sn\u00edmkovej frekvencie na vstupe HDMI je pretrv\u00e1vaj\u00facim probl\u00e9mom od n\u00e1stupu technol\u00f3gie VRR (Variable Refresh Rate) implementovanej v portoch HDMI 2.1. Tento probl\u00e9m pred zaveden\u00edm technol\u00f3gie VRR neexistoval, \u010do nazna\u010duje, \u017ee blikanie s\u00favis\u00ed s prisp\u00f4soben\u00edm displejov premenliv\u00fdm frekvenci\u00e1m. Vysvetl\u00edm, pre\u010do k blikaniu doch\u00e1dza a \u010di […]<\/p>\n","protected":false},"author":1,"featured_media":11317,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[86],"tags":[21],"class_list":{"0":"post-11314","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technologia","8":"tag-tv"},"_links":{"self":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11314","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/comments?post=11314"}],"version-history":[{"count":2,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11314\/revisions"}],"predecessor-version":[{"id":11318,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/11314\/revisions\/11318"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media\/11317"}],"wp:attachment":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media?parent=11314"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/categories?post=11314"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/tags?post=11314"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}