{"id":433,"date":"2020-10-01T00:00:00","date_gmt":"2020-09-30T22:00:00","guid":{"rendered":"http:\/\/qoe.agh.edu.pl\/?p=433"},"modified":"2021-03-21T20:44:13","modified_gmt":"2021-03-21T19:44:13","slug":"towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards","status":"publish","type":"post","link":"https:\/\/qoe.agh.edu.pl\/pl\/2020\/10\/01\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\/","title":{"rendered":"Czynniki wp\u0142ywaj\u0105ce na jako\u015b\u0107 postrzegan\u0105 przez u\u017cytkownik\u00f3w us\u0142ug video. Badania z wykorzystaniem trafnych ekologicznie standard\u00f3w oceny"},"content":{"rendered":"<p>Projekt \u201eCzynniki wp\u0142ywaj\u0105ce na jako\u015b\u0107 postrzegan\u0105 przez u\u017cytkownik\u00f3w us\u0142ug video. Badania z wykorzystaniem trafnych ekologicznie standard\u00f3w oceny\u201d ma na celu lepsze zrozumienie, kt\u00f3re czynniki odgrywaj\u0105 rol\u0119, gdy ludzie korzystaj\u0105 z us\u0142ug wideo: dlaczego niekt\u00f3re do\u015bwiadczenia s\u0105 pozytywne, a inne negatywne? Dlaczego jako\u015b\u0107 jest czasami uwa\u017cana za \u201enaprawd\u0119 z\u0142\u0105\u201d, a w innych przypadkach za bardzo dobr\u0105? Jakie czynniki odgrywaj\u0105 rol\u0119 w tym wzgl\u0119dzie i jak si\u0119 one oddzia\u0142uj\u0105? Jak u\u017cytkownicy do\u015bwiadczaj\u0105 z us\u0142ug wideo jako\u015bci us\u0142ug wideo. Wszyscy korzystamy z us\u0142ug wideo, kt\u00f3re s\u0105 stale rozwijane. Film z lat 80. lub 90. grany w dzisiejszym kanale telewizyjnym wygl\u0105da znacznie gorzej ni\u017c reklama w przerwach filmu, nawet je\u015bli stary film przechodzi procedur\u0119 poprawiania jako\u015bci. Rozw\u00f3j jako\u015bci wideo spowodowany jest wieloma czynnikami, w kt\u00f3rych istotn\u0105 rol\u0119 odgrywaj\u0105 lepsze algorytmy kompresji.<\/p>\n\n\n\n<p>Badania jako\u015bci wideo maj\u0105 d\u0142ug\u0105 histori\u0119, a ich g\u0142\u00f3wn\u0105 si\u0142\u0105 nap\u0119dow\u0105 jest poprawa jako\u015bci pikseli. Jest to rozs\u0105dne, poniewa\u017c jako\u015b\u0107 pikseli ma oczywi\u015bcie g\u0142\u00f3wny wp\u0142yw na nasz\u0105 opini\u0119 na temat jako\u015bci us\u0142ugi. Niemniej jednak nie jest to jedyny pow\u00f3d, dla kt\u00f3rego korzystamy z konkretnej us\u0142ugi. Nie skupiamy si\u0119 wy\u0142\u0105cznie na jako\u015bci pikseli i jako\u015bci tre\u015bci. Istniej\u0105 inne czynniki, kt\u00f3re sprawiaj\u0105, \u017ce narzekamy na niemal idealn\u0105 jako\u015b\u0107 filmu ogl\u0105danego w kinie domowym, zaprojektowanego do ogl\u0105dania najlepszej mo\u017cliwej jako\u015bci, lub prawie ignorujemy problemy z jako\u015bci\u0105, gdy jeste\u015bmy na wakacjach ze s\u0142abym dost\u0119pem do Internetu, ale nasza ulubiona dru\u017cyna gra!<\/p>\n\n\n\n<p>Obecnie spos\u00f3b, w jaki otrzymujemy informacje od u\u017cytkownik\u00f3w, jest \u015bci\u015ble powi\u0105zany z jako\u015bci\u0105 pikseli. Nie obejmuje \u017cadnych innych czynnik\u00f3w. Procedura eksperymentu wyra\u017anie prosi tester\u00f3w, aby je zignorowali! Typowy eksperyment prezentuje kr\u00f3tkie filmy, cz\u0119sto bez d\u017awi\u0119ku, w kt\u00f3rych tre\u015b\u0107 filmu cz\u0119sto si\u0119 powtarza. Instrukcja prosi wyra\u017anie testera o zignorowanie tre\u015bci filmu. Celem tych bada\u0144 jest zmiana procedur testowych, \u017ceby pozwala\u0142y bada\u0107 inne czynniki ni\u017c tylko jako\u015b\u0107 pikseli. Aby osi\u0105gn\u0105\u0107 taki ambitny plan, przeprowadzimy wiele r\u00f3\u017cnych eksperyment\u00f3w zar\u00f3wno w Polsce, jak i w Norwegii. Wszystkie eksperymenty, kt\u00f3re planujemy przeprowadzi\u0107, r\u00f3\u017cni\u0105 si\u0119 od eksperyment\u00f3w klasycznych. Dlatego g\u0142\u00f3wne obci\u0105\u017cenie prac\u0105 w ramach tego projektu koncentruje si\u0119 na szczeg\u00f3\u0142owym planowaniu eksperymentu, jego wst\u0119pnym testowaniu, modyfikacji i wreszcie uruchomieniu na grupie u\u017cytkownik\u00f3w. Planowane eksperymenty zawieraj\u0105 takie aspekty jak: ogl\u0105danie tre\u015bci wybranych przez u\u017cytkownik\u00f3w, ogl\u0105danie tre\u015bci tworzonych przez najbli\u017cszych lub obcych ludzi, ogl\u0105danie w grupie i inne. Zaanga\u017cowanie dw\u00f3ch laboratori\u00f3w w ten proces jest szczeg\u00f3lnie wa\u017cne, poniewa\u017c por\u00f3wnanie wynik\u00f3w mi\u0119dzy dwoma laboratoriami mo\u017ce ujawni\u0107 pewne problemy z opisem procedury lub samym eksperymentem.<\/p>\n\n\n\n<p>We wniosku opisali\u015bmy 7 r\u00f3\u017cnych eksperyment\u00f3w, kt\u00f3rych analiza pozwala nam zaproponowa\u0107 model czynnik\u00f3w wp\u0142ywaj\u0105cych na jako\u015b\u0107. Kolejna cz\u0119\u015b\u0107 projektu b\u0119dzie koncentrowa\u0107 si\u0119 na \u201estresowaniu\u201d tego modelu poprzez zaproponowanie nowych subiektywnych eksperyment\u00f3w. Te eksperymenty dotycz\u0105 okre\u015blonych aspekt\u00f3w modelu. W tej chwili nie mo\u017cemy przewidzie\u0107 dok\u0142adnej procedury nowych eksperyment\u00f3w, jest to jedno z zada\u0144 badawczych, kt\u00f3re musimy wykona\u0107. Dane uzyskane z ko\u0144cowych eksperyment\u00f3w zostan\u0105 wykorzystane do sfinalizowania naszego modelu, kt\u00f3ry jest g\u0142\u00f3wnym rezultatem projektu.<\/p>\n\n\n\n<p>R\u00f3wnolegle b\u0119dziemy prowadzi\u0107 d\u0142ugoterminowe badania, w kt\u00f3rych d\u0105\u017cymy do wsp\u00f3\u0142pracy z u\u017cytkownikami ponad dwa lat. Z tych obserwacji wyci\u0105gamy wnioski, kt\u00f3re czynniki maj\u0105 najwi\u0119ksze znaczenie w perspektywie d\u0142ugoterminowej. Zn\u00f3w klasyczne eksperymenty ignoruj\u0105 efekty d\u0142ugoterminowe i chcieliby\u015bmy wiedzie\u0107, ile tracimy, pytaj\u0105c u\u017cytkownik\u00f3w tylko raz w por\u00f3wnaniu do d\u0142ugiej i stabilnej wsp\u00f3\u0142pracy.<\/p>\n\n\n\n<p>Wszystkie przeprowadzane przez nas eksperymenty maj\u0105 szczeg\u00f3\u0142owy opis. Om\u00f3wimy zar\u00f3wno procedur\u0119, jak i analiz\u0119 danych ze spo\u0142eczno\u015bci\u0105 naukow\u0105. Naszym celem jest sprawienie, by procedury eksperyment\u00f3w sta\u0142y si\u0119 bardziej popularne i wykorzystywane przez innych badaczy. Ostatecznym rozwi\u0105zaniem powinno by\u0107 zwi\u0119kszenie \u015bwiadomo\u015bci na temat nowo odkrytych czynnik\u00f3w i ostatecznie lepsze us\u0142ugi wideo stworzone dla nas wszystkich.<\/p>","protected":false},"excerpt":{"rendered":"<p>Projekt \u201eCzynniki wp\u0142ywaj\u0105ce na jako\u015b\u0107 postrzegan\u0105 przez u\u017cytkownik\u00f3w us\u0142ug video. Badania z wykorzystaniem trafnych ekologicznie standard\u00f3w oceny\u201d ma na celu lepsze zrozumienie, kt\u00f3re czynniki odgrywaj\u0105 rol\u0119, gdy ludzie korzystaj\u0105 z us\u0142ug wideo: dlaczego niekt\u00f3re do\u015bwiadczenia s\u0105 pozytywne, a inne negatywne? Dlaczego jako\u015b\u0107 czasami uwa\u017cana jest za \u201enaprawd\u0119 z\u0142\u0105\u201d, a w innych przypadkach za bardzo dobr\u0105? Jakie czynniki\u2026 <\/p>\n<p class=\"link-more\"><a href=\"https:\/\/qoe.agh.edu.pl\/pl\/2020\/10\/01\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\/\" class=\"more-link\">Czytaj dalej<span class=\"screen-reader-text\"> \u201eTowards Better Understanding of Factors Influencing the QoE by More Ecologically-Valid Evaluation Standards\u201d<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":434,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[4],"tags":[],"class_list":["post-433","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tufiqoe"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Towards Better Understanding of Factors Influencing the QoE by More Ecologically-Valid Evaluation Standards - AGH Video Quality of Experience (QoE) Team<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/qoe.agh.edu.pl\/pl\/2020\/10\/01\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\/\" \/>\n<meta property=\"og:locale\" content=\"pl_PL\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Towards Better Understanding of Factors Influencing the QoE by More Ecologically-Valid Evaluation Standards - AGH Video Quality of Experience (QoE) Team\" \/>\n<meta property=\"og:description\" content=\"The Project \u201cTowards Better Understanding of Factors Influencing the QoE by More Ecologically-Valid Evaluation Standards\u201d aims to understand better which factors play a role when people use video services: why are some experiences positive, while others are negative? Why is the quality sometimes considered \u201creally bad\u201d and in other cases as very good? Which factors &hellip; Czytaj dalej \u201eTowards Better Understanding of Factors Influencing the QoE by More Ecologically-Valid Evaluation Standards\u201d\" \/>\n<meta property=\"og:url\" content=\"https:\/\/qoe.agh.edu.pl\/pl\/2020\/10\/01\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\/\" \/>\n<meta property=\"og:site_name\" content=\"AGH Video Quality of Experience (QoE) Team\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/qoe.lab.agh\" \/>\n<meta property=\"article:published_time\" content=\"2020-09-30T22:00:00+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2021-03-21T19:44:13+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/i0.wp.com\/qoe.agh.edu.pl\/wp-content\/uploads\/2021\/03\/Norway_grants.png?fit=1793%2C1716&ssl=1\" \/>\n\t<meta property=\"og:image:width\" content=\"1793\" \/>\n\t<meta property=\"og:image:height\" content=\"1716\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"qoe\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Napisane przez\" \/>\n\t<meta name=\"twitter:data1\" content=\"qoe\" \/>\n\t<meta name=\"twitter:label2\" content=\"Szacowany czas czytania\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minuty\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/2020\\\/10\\\/01\\\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\\\/#article\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/2020\\\/10\\\/01\\\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\\\/\"},\"author\":{\"name\":\"qoe\",\"@id\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/#\\\/schema\\\/person\\\/94d816cad23eb0d6cfca459464f380fa\"},\"headline\":\"Towards Better Understanding of Factors Influencing the QoE by More Ecologically-Valid Evaluation Standards\",\"datePublished\":\"2020-09-30T22:00:00+00:00\",\"dateModified\":\"2021-03-21T19:44:13+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/2020\\\/10\\\/01\\\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\\\/\"},\"wordCount\":706,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/#organization\"},\"image\":{\"@id\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/2020\\\/10\\\/01\\\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\\\/#primaryimage\"},\"thumbnailUrl\":\"https:\\\/\\\/i0.wp.com\\\/qoe.agh.edu.pl\\\/wp-content\\\/uploads\\\/2021\\\/03\\\/Norway_grants.png?fit=1793%2C1716&ssl=1\",\"articleSection\":[\"TUFIQoE\"],\"inLanguage\":\"pl-PL\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\\\/\\\/qoe.agh.edu.pl\\\/2020\\\/10\\\/01\\\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\\\/#respond\"]}]},{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/2020\\\/10\\\/01\\\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\\\/\",\"url\":\"https:\\\/\\\/qoe.agh.edu.pl\\\/2020\\\/10\\\/01\\\/towards-better-understanding-of-factors-influencing-the-qoe-by-more-ecologically-valid-evaluation-standards\\\/\",\"name\":\"Towards Better Understanding of Factors Influencing the QoE by More Ecologically-Valid Evaluation Standards - 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Why is the quality sometimes considered \u201creally bad\u201d and in other cases as very good? 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