{"id":5324,"date":"2023-10-12T15:04:20","date_gmt":"2023-10-12T15:04:20","guid":{"rendered":"https:\/\/csiag.eu\/?p=5324"},"modified":"2023-10-12T15:09:59","modified_gmt":"2023-10-12T15:09:59","slug":"videoteknologi","status":"publish","type":"post","link":"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/","title":{"rendered":"Video-teknologi"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Indholdsfortegnelse<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Umschalter\" >Omskifter<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#HDMI\" >HDMI<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#DVI\" >DVI<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#VGA\" >VGA<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Composite\" >Sammensat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Multiformat\" >Multiformat<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Prasentationsumschalter\" >Pr\u00e6sentationsomskifter<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Verteiler\" >Distribut\u00f8r<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Verstarker_Verlangerungen\" >Forst\u00e6rkere\/udvidelser<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Kreuzschiene_Matrix\" >Tv\u00e6rstang \/ Matrix<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Streaming_Encoder_Decoder\" >Streaming-encoder\/decoder<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Scaler\" >Skalering<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Prozessoren\" >Processorer<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/#Video-Wandler\" >Video-konverter<\/a><\/li><\/ul><\/nav><\/div>\n<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">L\u00e6setid<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutter<\/span><\/span>\n<p class=\"wp-block-paragraph\">En analog til <a href=\"https:\/\/csiag.eu\/da\/lydteknologi\/\" data-type=\"post\" data-id=\"5321\">Lydteknologi<\/a> i videoteknologi skal de faktiske krav fastl\u00e6gges omhyggeligt, ogs\u00e5 med henblik p\u00e5 fremtiden. Intet er mere \u00e6rgerligt end at skulle s\u00e6lge udstyr, der lige er k\u00f8bt med tab, fordi det ikke kan opfylde de - nyligt \u00e6ndrede - krav.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Komponenterne er forskellige, og der er mange muligheder. Her er et udvalg af de mest almindelige enheder, deres anvendelsesomr\u00e5de og tekniske detaljer, for s\u00e5 vidt som de er relevante for k\u00f8bsbeslutningen.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">De respektive komponenter skal v\u00e6lges i henhold til de anvendte videoforbindelsesformater (HDMI, DVI, VGA, komposit osv.). Multiformat-udstyr tilbyder forbindelser til flere formater i \u00e9n enhed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Umschalter\"><\/span>Omskifter<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"HDMI\"><\/span>HDMI<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tilslutning af flere HDMI-videokilder til \u00e9n HDMI-udgang<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Skiftet sker via knapper p\u00e5 enheden, en IR-fjernbetjening eller RS232-gr\u00e6nseflade.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">N\u00e5r du v\u00e6lger HDMI-switch, HDMI- og HDCP-version (<em>Beskyttelse af digitalt indhold med h\u00f8j b\u00e5ndbredde<\/em>) er afg\u00f8rende. Hvis du er p\u00e5 udkig efter en 8k-kompatibel (HDMI 2.1) enhed, vil du ikke v\u00e6re tilfreds med HDMI 2.0 (4k).<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mere om det <a href=\"https:\/\/csiag.eu\/da\/hdmi-teknologi\/\" data-type=\"post\" data-id=\"5277\">Information om<\/a> til HDMI.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"DVI\"><\/span>DVI<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tilslutning af DVI-kilder til en DVI-udgang<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Skift sker via knapper, IR-fjernbetjening eller RS232-interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Underst\u00f8tter opl\u00f8sninger p\u00e5 op til 1920 x 1200 (WUXGA) og 1080p (HDTV). Lyd- og videosignaler kan normalt skiftes separat. Man skal v\u00e6re opm\u00e6rksom p\u00e5 HDCP-overensstemmelse.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"VGA\"><\/span>VGA<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tilslutning af op til 32 VGA-kilder til \u00e9n VGA-udgang<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Skift sker via knapper, IR-fjernbetjening eller RS232-interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Underst\u00f8tter opl\u00f8sninger p\u00e5 op til 2048 x 1536 60Hz. Lyd- og videosignaler kan normalt skiftes separat.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Composite\"><\/span>Sammensat<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Tilslutning af op til 4 kompositkilder til en kompositudgang<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Skiftet sker ved hj\u00e6lp af knapper.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kun video er skiftet!<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Multiformat\"><\/span>Multiformat<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Samtidig tilslutning af forskellige input- og outputformater<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Skiftet sker automatisk eller via RS232-gr\u00e6nseflade.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Mutiformat audio-video switchers tilbyder flere indgangsformater samtidigt, f.eks. HDMI, VGA, DVI, Composite, S-Video, YUV\/HD, SDI, HDBaseT, DGGKat, DisplayPort, USB-C, Lightning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hvis det er n\u00f8dvendigt, s\u00f8rger en integreret scaler for, at videosignalet tilpasses en standardiseret udgangsopl\u00f8sning.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HDMI- og HDCP-versionen har igen f\u00f8rsteprioritet i beslutningsprocessen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prasentationsumschalter\"><\/span>Pr\u00e6sentationsomskifter<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Samtidig tilslutning af forskellige input- og outputformater med scaler<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Skiftet sker via knapper, automatisk eller RS232-interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Pr\u00e6sentationsomskiftere er udstyret med scalere for at sikre et standardiseret outputformat, uanset det indg\u00e5ende format.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kombinationsenheder kombinerer en multiformat-switcher, scaler, linjeforst\u00e6rker og matrix-switcher i \u00e9n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">HDMI- og HDCP-versioner skal altid tages i betragtning, n\u00e5r man v\u00e6lger en enhed.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verteiler\"><\/span>Distribut\u00f8r<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Distribution af EN videokilde til flere outputenheder.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">De er ogs\u00e5 inddelt i de ovenn\u00e6vnte outputformater. HDMI- og HDCP-versioner er ogs\u00e5 de grundl\u00e6ggende udv\u00e6lgelseskriterier.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Skift via knapper eller automatisk.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Forskellene ligger i antallet af signalkilder, der kan tilsluttes, normalt en, nogle gange flere, og antallet af udgange. Der er ogs\u00e5 forskellig underst\u00f8ttelse af analoge og\/eller digitale lydsignaler, s\u00e5som RCA (L\/R), SPDIF og Toslink.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verstarker_Verlangerungen\"><\/span>Forst\u00e6rkere\/udvidelser<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">HDMI- og HDCP-versioner skal overholdes for alle HDMI-enheder og udg\u00f8r det grundl\u00e6ggende kriterium for yderligere valg.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kablede teknologier bygger bro over 30 ... 150 m, mens enheder baseret p\u00e5 fiberoptisk teknologi ogs\u00e5 kan opn\u00e5 kabell\u00e6ngder p\u00e5 flere hundrede meter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kreuzschiene_Matrix\"><\/span>Tv\u00e6rstang \/ Matrix<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Crossbars bruges til at distribuere forskellige audio-video-inputformater til forskellige m\u00e5lenheder (sinks) efter behov.<br>De skifter ved f\u00f8rst at frakoble den aktuelle videokilde fra udgangen og f\u00f8rst tilslutte den nye indgang kort tid efter. Dette resulterede i en kort sort sk\u00e6rm. Nyere s\u00f8ml\u00f8se matrixer\/matrixomskiftere kan skifte \"s\u00f8ml\u00f8st\".<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u00e5 l\u00e6nge de HDMI-enheder, der skal tilsluttes, er i umiddelbar n\u00e6rhed (4 m), er s\u00e5kaldte permanent konfigurerede matrixomskiftere tilstr\u00e6kkelige. Men hvis der skal bygges bro over l\u00e6ngere afstande, er en HDMI HDBaseT A\/V-matrix et bedre valg. Ud over selve matrixen omfatter den ogs\u00e5 den n\u00f8dvendige signalforst\u00e6rker, som muligg\u00f8r transmission via CAT.7-netv\u00e6rkskabel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hvis DVI-, VGA-, SDI-, komposit- eller S-Video-signaler skal sammenkobles, er det tilstr\u00e6kkeligt med den permanent konfigurerede A\/V-matrix\/tv\u00e6rskinne, der blev n\u00e6vnt i begyndelsen.<br>Det skal bem\u00e6rkes, at der skal tages hensyn til, om der ogs\u00e5 skal behandles\/tilsluttes lydsignaler, og om der ogs\u00e5 kr\u00e6ves HDMI- og HDCP-kompatibilitet.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Hvis det kan forventes, at flere enheder skal sammenkobles p\u00e5 lang sigt end planlagt, b\u00f8r man bruge en modul\u00e6r A\/V-matrix for at undg\u00e5 un\u00f8dvendige investeringer.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Streaming_Encoder_Decoder\"><\/span>Streaming-encoder\/decoder<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Streaming-enkodere bruges som optageenheder til A\/V-data, f.eks. til rapporter, interviews osv. De koder 4k UHD- eller Full HD-videostr\u00f8mmen, inklusive lyd, i henhold til H.264- eller H.265-codec. Dataene kan bearbejdes yderligere i masterkvalitet via et lagermedie.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H.264 og H.265 er komprimeringsmetoder, der reducerer den store m\u00e6ngde data under optagelsen. H.265 komprimerer dobbelt s\u00e5 meget som H.264 med samme kvalitet og stiller derfor st\u00f8rre krav til computerkraft og budget. H.265 bruges hovedsageligt til 8k-opl\u00f8sninger.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Scaler\"><\/span>Skalering<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Skalere bruges til at konvertere et indgangssignal til andre formater og signalformer. De er normalt en del af pr\u00e6sentationsomskiftere og matrixomskiftere eller routere.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prozessoren\"><\/span>Processorer<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Multi-viewer-videoprocessorer bruges til at behandle og vise flere videokilder p\u00e5 individuelle displayenheder, som f.eks. monitorer eller tv'er, der kombineres til store sk\u00e6rme. For at opn\u00e5 et s\u00f8ml\u00f8st optisk billede skal der altid bruges n\u00e6sten kantl\u00f8se sk\u00e6rme\/tv'er. Kantbredden kan indstilles p\u00e5 softwaresiden og dermed tages i betragtning matematisk under afspilningen.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Video-Wandler\"><\/span>Video-konverter<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Videokonvertere konverterer videosignaler fra analog til digital (A\/D-konverter) og omvendt (D\/A-konverter). Analoge signaler er f.eks. VGA, kompositvideo (FBAS), S-Video (Y\/V) eller komponentvideo (YUV, YPbPr), digital DVI og HDMI eller (Mini)DisplayPort.<\/p>","protected":false},"excerpt":{"rendered":"<p><span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">L\u00e6setid<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minutter<\/span><\/span>Ligesom med lydteknologi skal de faktiske krav til videoteknologi ogs\u00e5 fastl\u00e6gges omhyggeligt p\u00e5 lang sigt. Intet er mere irriterende end at skulle skille sig af med udstyr, der lige er blevet k\u00f8bt med tab, fordi det ikke kan opfylde de - nyligt \u00e6ndrede - krav. Komponenterne er forskellige, og der er mange muligheder. Her er et udvalg af de mest almindelige enheder,...&nbsp;<a href=\"https:\/\/csiag.eu\/da\/blog\/2023\/10\/12\/video-technik\/\" rel=\"bookmark\">L\u00e6s mere \"<span class=\"screen-reader-text\">Video-teknologi<\/span><\/a><\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","neve_meta_sidebar":"","neve_meta_container":"","neve_meta_enable_content_width":"","neve_meta_content_width":0,"neve_meta_title_alignment":"","neve_meta_author_avatar":"","neve_post_elements_order":"","neve_meta_disable_header":"","neve_meta_disable_footer":"","neve_meta_disable_title":"","footnotes":""},"categories":[2428],"tags":[2440,2545,2441,2550,2552,2408,2444,2521,2551,2543,2527,2471,2528,2542,2546,2531,2532,2526,2519,2429,2540,2530,2541,2548,2535,2534,2547,2537,2522,2523,2533,2525,2538,2544,2539,2529,2520,2367,2536,2518,2549,2524],"class_list":["post-5324","post","type-post","status-publish","format-standard","hentry","category-video-technik","tag-4k","tag-4k-uhd","tag-8k","tag-ad-wandler","tag-analog","tag-aufloesung","tag-cat-7","tag-composite","tag-da-wandler","tag-decoder","tag-dggkat","tag-digital","tag-displayport","tag-encoder","tag-full-hd","tag-h-264","tag-h-265","tag-hdbaset","tag-hdcp","tag-hdmi","tag-kreuzschiene","tag-lightning","tag-matrix","tag-multi-video-prozessor","tag-multiformat","tag-praesentationsumschalter","tag-prozessoren","tag-rca","tag-rs232","tag-s-video","tag-scaler","tag-sdi","tag-spdif","tag-streaming","tag-toslink","tag-usb-c","tag-version","tag-verstaerker","tag-verteiler","tag-vga","tag-video-wandler","tag-yuv-hd"],"modified_by":"Achim Goerner","_links":{"self":[{"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/posts\/5324","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/comments?post=5324"}],"version-history":[{"count":0,"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/posts\/5324\/revisions"}],"wp:attachment":[{"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/media?parent=5324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/categories?post=5324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csiag.eu\/da\/wp-json\/wp\/v2\/tags?post=5324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}