{"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":"videoteknik","status":"publish","type":"post","link":"https:\/\/csiag.eu\/sv\/blog\/2023\/10\/12\/video-technik\/","title":{"rendered":"Videoteknik"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 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\">Inneh\u00e5llsf\u00f6rteckning<\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Umschalter\" >Vippstr\u00f6mbrytare<\/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\/sv\/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\/sv\/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\/sv\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Composite\" >Sammansatt<\/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\/sv\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Prasentationsumschalter\" >Presentationsv\u00e4xlare<\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Verteiler\" >distribut\u00f6r<\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Verstarker_Verlangerungen\" >F\u00f6rst\u00e4rkare\/f\u00f6rl\u00e4ngare<\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Kreuzschiene_Matrix\" >Matris\/matris<\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Streaming_Encoder_Decoder\" >Str\u00f6mmande kodare\/avkodare<\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Scaler\" >Skalare<\/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\/sv\/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\/sv\/blog\/2023\/10\/12\/video-technik\/#Video-Wandler\" >Videoomvandlare<\/a><\/li><\/ul><\/nav><\/div>\n<span class=\"span-reading-time rt-reading-time\" style=\"display: block;\"><span class=\"rt-label rt-prefix\">L\u00e4stid<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minuter<\/span><\/span>\n<p>Analogt med <a href=\"https:\/\/csiag.eu\/sv\/ljudteknik\/\" data-type=\"post\" data-id=\"5321\">Ljudteknik<\/a> Inom videoteknik m\u00e5ste det faktiska behovet noggrant fastst\u00e4llas, \u00e4ven p\u00e5 synh\u00e5ll. Inget \u00e4r mer irriterande \u00e4n att beh\u00f6va s\u00e4lja en del av den utrustning du just k\u00f6pt med f\u00f6rlust eftersom den inte kan uppfylla de nyligen \u00e4ndrade kraven.<\/p>\n\n\n\n<p>Komponenterna \u00e4r olika och m\u00f6jligheterna \u00e4r m\u00e5nga. H\u00e4r \u00e4r ett urval av de vanligaste enheterna, deras anv\u00e4ndningsomr\u00e5den och tekniska detaljer som \u00e4r relevanta f\u00f6r k\u00f6pbeslutet.<\/p>\n\n\n\n<p>Respektive komponenter m\u00e5ste v\u00e4ljas enligt de videoanslutningsformat som anv\u00e4nds (HDMI, DVI, VGA, komposit, etc.). Multiformatutrustning erbjuder anslutningar f\u00f6r flera format i en enhet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Umschalter\"><\/span>Vippstr\u00f6mbrytare<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>Anslut flera HDMI-videok\u00e4llor till en HDMI-utg\u00e5ng<\/li>\n<\/ul>\n\n\n\n<p>Omkoppling sker via knappar p\u00e5 enheten, en IR-fj\u00e4rrkontroll eller RS232-gr\u00e4nssnitt.<\/p>\n\n\n\n<p>N\u00e4r du v\u00e4ljer HDMI switcher, HDMI och HDCP version (<em>Skydd f\u00f6r digitalt inneh\u00e5ll med h\u00f6g bandbredd<\/em>) avg\u00f6rande. Om du letar efter en 8k-kapabel (HDMI 2.1) enhet kommer du inte att vara n\u00f6jd med HDMI 2.0 (4k).<\/p>\n\n\n\n<p>Mer <a href=\"https:\/\/csiag.eu\/sv\/hdmi-teknik\/\" data-type=\"post\" data-id=\"5277\">information<\/a> till 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>Ansluta DVI-k\u00e4llor till en DVI-utg\u00e5ng<\/li>\n<\/ul>\n\n\n\n<p>Omkoppling sker med knappar, IR-fj\u00e4rrkontroll eller RS232-gr\u00e4nssnitt.<\/p>\n\n\n\n<p>St\u00f6der uppl\u00f6sningar upp till 1920 x 1200 (WUXGA) och 1080p (HDTV). Ljud- och videosignaler kan vanligtvis v\u00e4xlas separat. Uppm\u00e4rksamhet b\u00f6r f\u00e4stas vid HDCP-efterlevnad.<\/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>Anslut upp till 32 VGA-k\u00e4llor till en VGA-utg\u00e5ng<\/li>\n<\/ul>\n\n\n\n<p>Omkoppling sker med knappar, IR-fj\u00e4rrkontroll eller RS232-gr\u00e4nssnitt.<\/p>\n\n\n\n<p>St\u00f6der uppl\u00f6sningar upp till 2048 x 1536 60Hz. Ljud- och videosignaler kan vanligtvis v\u00e4xlas separat.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Composite\"><\/span>Sammansatt<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Anslut upp till 4 kompositk\u00e4llor till en kompositutg\u00e5ng<\/li>\n<\/ul>\n\n\n\n<p>Byte g\u00f6rs med knappar.<\/p>\n\n\n\n<p>Endast video visas!<\/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 anslutning av olika in- och utg\u00e5ngsformat<\/li>\n<\/ul>\n\n\n\n<p>Omkoppling sker automatiskt eller via RS232-gr\u00e4nssnitt.<\/p>\n\n\n\n<p>Mutiformat audio-video switchers erbjuder flera ing\u00e5ngsformat samtidigt, t.ex. HDMI, VGA, DVI, Composite, S-Video, YUV\/HD, SDI, HDBaseT, DGGKat, DisplayPort, USB-C, Lightning.<\/p>\n\n\n\n<p>Vid behov ser en integrerad scaler till att videosignalen justeras till en enhetlig utg\u00e5ngsuppl\u00f6sning.<\/p>\n\n\n\n<p>HDMI- och HDCP-versioner \u00e4r \u00e5terigen prioritet ett i beslutsprocessen.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Prasentationsumschalter\"><\/span>Presentationsv\u00e4xlare<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Samtidig anslutning av olika in- och utformat med skalare<\/li>\n<\/ul>\n\n\n\n<p>Omkoppling sker via knappar, automatiskt eller via RS232-gr\u00e4nssnittet.<\/p>\n\n\n\n<p>Presentationsv\u00e4xlare \u00e4r utrustade med skalare f\u00f6r att s\u00e4kerst\u00e4lla ett konsekvent utdataformat, oavsett inkommande format.<\/p>\n\n\n\n<p>Kombinationsenheter kombinerar multiformatv\u00e4xlare, skalare, linjef\u00f6rst\u00e4rkare och matrisv\u00e4xlare i ett.<\/p>\n\n\n\n<p>HDMI- och HDCP-versioner m\u00e5ste beaktas vid val av enhet.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verteiler\"><\/span>distribut\u00f6r<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Distribution av EN videok\u00e4lla till flera utg\u00e5ngsenheter.<\/li>\n<\/ul>\n\n\n\n<p>De \u00e4r ocks\u00e5 uppdelade i de ovan n\u00e4mnda utdataformaten. HDMI- och HDCP-versioner \u00e4r \u00e5terigen de grundl\u00e4ggande urvalskriterierna.<\/p>\n\n\n\n<p>Omkoppling sker via knappar eller automatiskt.<\/p>\n\n\n\n<p>Skillnaderna ligger i antalet signalk\u00e4llor som kan anslutas, vanligtvis en, eventuellt flera, och antalet utg\u00e5ngar. Det finns ocks\u00e5 olika st\u00f6d f\u00f6r analoga och\/eller digitala ljudsignaler, s\u00e5som RCA (L\/R), SPDIF och Toslink.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Verstarker_Verlangerungen\"><\/span>F\u00f6rst\u00e4rkare\/f\u00f6rl\u00e4ngare<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>F\u00f6r alla HDMI-enheter m\u00e5ste HDMI- och HDCP-versioner beaktas och utg\u00f6ra grundkriteriet f\u00f6r vidare val.<\/p>\n\n\n\n<p>Tr\u00e5dbunden teknik sp\u00e4nner \u00f6ver 30 till 150 m, medan enheter baserade p\u00e5 fiberoptisk teknik ocks\u00e5 kan uppn\u00e5 kabell\u00e4ngder p\u00e5 n\u00e5gra hundra meter.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Kreuzschiene_Matrix\"><\/span>Matris\/matris<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Matrisv\u00e4xlar anv\u00e4nds f\u00f6r att godtyckligt distribuera olika audio-video-ing\u00e5ngsformat till olika m\u00e5lenheter (s\u00e4nkor).<br>Du byter genom att f\u00f6rst koppla bort den aktuella videok\u00e4llan fr\u00e5n utg\u00e5ngen och sedan ansluta den nya ing\u00e5ngen kort d\u00e4refter. Detta resulterade i en kort svart sk\u00e4rm. Nyare s\u00f6ml\u00f6s matris\/tv\u00e4rbalkar kan v\u00e4xla &quot;s\u00f6ml\u00f6st&quot;.<\/p>\n\n\n\n<p>S\u00e5 l\u00e4nge HDMI-enheterna som ska kopplas samman finns i omedelbar n\u00e4rhet (4 m) r\u00e4cker det med s\u00e5 kallade permanent konfigurerade matrisv\u00e4xlare. Men om st\u00f6rre avst\u00e5nd m\u00e5ste \u00f6verbryggas \u00e4r du b\u00e4ttre betj\u00e4nt med en HDMI HDBaseT A\/V-matris. Detta inkluderar f\u00f6rutom sj\u00e4lva matrisv\u00e4xeln \u00e4ven den n\u00f6dv\u00e4ndiga signalf\u00f6rst\u00e4rkaren, som m\u00f6jligg\u00f6r \u00f6verf\u00f6ring via CAT.7 n\u00e4tverkskabel.<\/p>\n\n\n\n<p>Om DVI-, VGA-, SDI-, komposit- eller S-Video-signaler ska anslutas r\u00e4cker den permanent konfigurerade A\/V-matris-\/matrisomkopplaren som n\u00e4mns i b\u00f6rjan.<br>Det b\u00f6r noteras att det m\u00e5ste beaktas om \u00e4ven ljudsignaler ska bearbetas\/sammankopplas och om HDMI- och HDCP-kompatibilitet ocks\u00e5 \u00f6nskas.<\/p>\n\n\n\n<p>Om man f\u00f6rv\u00e4ntar sig att fler enheter kommer beh\u00f6va anslutas i framtiden \u00e4n vad som nu planerats b\u00f6r en modul\u00e4r A\/V-matris byggas omedelbart f\u00f6r att undvika on\u00f6diga investeringar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Streaming_Encoder_Decoder\"><\/span>Str\u00f6mmande kodare\/avkodare<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Streamingkodare anv\u00e4nds som inspelningsenheter f\u00f6r A\/V-data, s\u00e5som rapporter, intervjuer, etc. De kodar videostr\u00f6mmen i 4k UHD eller Full HD, inklusive ljud, enligt H.264- eller H.265-codec. Data kan vidarebearbetas via lagringsmedium i masterkvalitet.<\/p>\n\n\n\n<p>H.264 och H.265 \u00e4r komprimeringsmetoder som minskar m\u00e4ngden data som kr\u00e4vs vid inspelning. H.265 komprimerar dubbelt s\u00e5 mycket som H.264 samtidigt som den h\u00e5ller samma kvalitet och st\u00e4ller d\u00e4rf\u00f6r h\u00f6gre krav p\u00e5 datorkraft och budget. H.265 anv\u00e4nds fr\u00e4mst f\u00f6r 8k-uppl\u00f6sningar.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Scaler\"><\/span>Skalare<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Skalare anv\u00e4nds f\u00f6r att konvertera en insignal till andra format och signalformer. De \u00e4r vanligtvis en del av presentationsv\u00e4xlar och matrisv\u00e4xlar eller matrisv\u00e4xlar.<\/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>Multi-viewer videoprocessorer anv\u00e4nds f\u00f6r att bearbeta och spela upp flera videok\u00e4llor p\u00e5 individuella uppspelningsenheter, s\u00e5som monitorer eller TV-apparater, som \u00e4r sammansatta till stora sk\u00e4rmar. F\u00f6r att f\u00e5 en s\u00f6ml\u00f6s optisk bild b\u00f6r n\u00e4stan kantl\u00f6sa monitorer\/TV alltid anv\u00e4ndas. Kantbredden kan st\u00e4llas in i programvaran och d\u00e4rmed tas i ber\u00e4kning matematiskt under uppspelning.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Video-Wandler\"><\/span>Videoomvandlare<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Videoomvandlare konverterar videosignaler fr\u00e5n analog till digital (A\/D-omvandlare) och vice versa (D\/A-omvandlare). Analoga signaler inkluderar VGA, kompositvideo (FBAS), S-Video (Y\/V) eller komponentvideo (YUV, YPbPr), digital DVI och 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\u00e4stid<\/span> <span class=\"rt-time\"> 3<\/span> <span class=\"rt-label rt-postfix\">minuter<\/span><\/span>Precis som f\u00f6r ljudteknik m\u00e5ste de faktiska kraven f\u00f6r videoteknik ocks\u00e5 fastst\u00e4llas noggrant p\u00e5 l\u00e5ng sikt. Ingenting \u00e4r mer irriterande \u00e4n att beh\u00f6va kassera utrustning som just k\u00f6pts med f\u00f6rlust f\u00f6r att den inte kan uppfylla de - nyligen \u00e4ndrade - kraven. Komponenterna \u00e4r m\u00e5nga och det finns m\u00e5nga m\u00f6jligheter. H\u00e4r \u00e4r ett urval av de vanligaste enheterna,...&nbsp;<a href=\"https:\/\/csiag.eu\/sv\/blog\/2023\/10\/12\/video-technik\/\" rel=\"bookmark\">L\u00e4s mer \"<span class=\"screen-reader-text\">Videoteknik<\/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\/sv\/wp-json\/wp\/v2\/posts\/5324","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/comments?post=5324"}],"version-history":[{"count":0,"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/posts\/5324\/revisions"}],"wp:attachment":[{"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/media?parent=5324"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/categories?post=5324"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/csiag.eu\/sv\/wp-json\/wp\/v2\/tags?post=5324"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}