{"id":1529,"date":"2022-08-03T00:27:52","date_gmt":"2022-08-03T00:27:52","guid":{"rendered":"https:\/\/global.tab-tv.com\/sk\/?p=1529"},"modified":"2022-08-03T00:27:53","modified_gmt":"2022-08-03T00:27:53","slug":"vysvetlenie-funkcie-instaport-rychly-prepinac-hdmi","status":"publish","type":"post","link":"https:\/\/global.tab-tv.com\/sk\/vysvetlenie-funkcie-instaport-rychly-prepinac-hdmi\/","title":{"rendered":"Vysvetlenie funkcie InstaPort (r\u00fdchly prep\u00edna\u010d HDMI)"},"content":{"rendered":"\n

<\/a>\u010co je r\u00fdchly prep\u00edna\u010d HDMI<\/strong><\/h1>\n\n\n\n

R\u00fdchly prep\u00edna\u010d HDMI je r\u00fdchly sp\u00f4sob prep\u00ednania medzi pr\u00edjmom videa HDMI na telev\u00edzore. Mali by ste vedie\u0165, \u017ee v \u00e9re anal\u00f3gov\u00e9ho videa ste mohli telev\u00edzne programy vo\u013ene nahr\u00e1va\u0165 napr\u00edklad na videokazetu. Kvalita z\u00e1znamu bola priemern\u00e1 a technicky nebolo mo\u017en\u00e9 ochr\u00e1ni\u0165 vysielanie pred kop\u00edrovan\u00edm. Ke\u010f sa za\u010dala \u00e9ra digit\u00e1lneho videa a najm\u00e4 ke\u010f sa objavili prehr\u00e1va\u010de Blu Ray, dr\u017eitelia pr\u00e1v za\u010dali nasto\u013eova\u0165 ot\u00e1zku ochrany obsahu pred kop\u00edrovan\u00edm. S v\u00fdrobcami prehr\u00e1va\u010dov, multimedi\u00e1lnych prehr\u00e1va\u010dov a telev\u00edzorov sa dosiahla dohoda, \u017ee video cez HDMI sa mus\u00ed pren\u00e1\u0161a\u0165 \u0161ifrovane pomocou protokolu HDCP. T\u00fdm sa zabr\u00e1nilo vytv\u00e1raniu nelicencovan\u00fdch k\u00f3pi\u00ed. V\u00fdmena \u0161ifrovac\u00edch k\u013e\u00fa\u010dov a nadviazanie spojenia na vytvorenie \u0161ifrovan\u00e9ho spojenia si v\u0161ak vy\u017eaduje \u010das. \u010cakac\u00ed \u010das je pribli\u017ene 10 sek\u00fand, v niektor\u00fdch pr\u00edpadoch o nie\u010do dlh\u0161\u00ed v pr\u00edpade, \u017ee je potrebn\u00e9 op\u00e4tovn\u00e9 pripojenie.<\/p>\n\n\n\n

V\u00fdrobcovia za\u010dali prem\u00fd\u0161\u013ea\u0165 o sp\u00f4soboch, ako skr\u00e1ti\u0165 \u010das pripojenia. Telev\u00edzory Samsung (Samsung HDMI quick switch) a Toshiba (Toshiba HDMI quick switch) podporuj\u00fa r\u00fdchle prep\u00ednanie medzi vstupmi HDMI, len niektor\u00e9 modely vy\u0161\u0161ej triedy, ale postupne bude r\u00fdchle prep\u00ednanie medzi vstupmi HDMI podporova\u0165 viac telev\u00edzorov. Telev\u00edzory s podporou r\u00fdchleho prep\u00ednania HDMI vyu\u017e\u00edvaj\u00fa technol\u00f3giu, ktor\u00e1 umo\u017e\u0148uje prep\u00edna\u0165 medzi vstupmi HDMI za 1 sekundu. T\u00fato technol\u00f3giu vyvinula e\u0161te v roku 2008 spolo\u010dnos\u0165 Silicon Image a pomaly sa dost\u00e1va do telev\u00edzorov popredn\u00fdch v\u00fdrobcov. \u010ealej vysvetl\u00edm, ako funguje r\u00fdchle prep\u00ednanie HDMI.<\/p>\n\n\n\n

Video je mo\u017en\u00e9 pren\u00e1\u0161a\u0165 pomocou HDMI HDCP, \u010do znamen\u00e1, \u017ee na ochranu prenosu videa sa pou\u017e\u00edva \u0161ifrovanie, video sa zo zariadenia do telev\u00edzora pren\u00e1\u0161a v za\u0161ifrovanej podobe a iba telev\u00edzor dek\u00f3duje digit\u00e1lny videoprenos. V skuto\u010dnosti je to trochu jednoduch\u0161ie: dve zariadenia si vymenia pr\u00edstupov\u00e9 k\u013e\u00fa\u010de a vytvor\u00ed sa spojenie.<\/p>\n\n\n\n

<\/a>Pr\u00e1ca na sch\u00e9me InstaPort<\/strong><\/h2>\n\n\n\n
\"\"
Pracovn\u00e1 sch\u00e9ma InstaPort<\/em><\/figcaption><\/figure>\n\n\n\n

<\/p>\n\n\n\n

<\/a>Ako funguje Instaport (r\u00fdchly prep\u00edna\u010d HDMI Samsung)<\/strong><\/h2>\n\n\n\n

Autentifika\u010dn\u00fd protokol sa pou\u017e\u00edva medzi vysiela\u010dom HDCP a prij\u00edma\u010dom HDCP na potvrdenie, \u017ee prij\u00edma\u010d HDCP je zariadenie, ktor\u00e9 m\u00f4\u017ee prij\u00edma\u0165 pr\u00edslu\u0161n\u00fd obsah. Potvrdenie spo\u010d\u00edva v znalosti tajn\u00e9ho s\u00faboru k\u013e\u00fa\u010dov. Ka\u017ed\u00e9 zariadenie HDCP je vybaven\u00e9 jedine\u010dn\u00fdm s\u00faborom \u0161tyridsiatich 56-bitov\u00fdch tajn\u00fdch k\u013e\u00fa\u010dov, naz\u00fdvan\u00fdch DPK (Device Private Keys), ktor\u00e9 sa z\u00edskavaj\u00fa od spolo\u010dnosti DCP LLC. Po\u010das komunik\u00e1cie zariadenia vytv\u00e1raj\u00fa zdie\u013ean\u00e9 tajomstvo, ktor\u00e9 nemo\u017eno odpo\u010d\u00fava\u0165, a toto tajomstvo sa potom pou\u017e\u00edva ako symetrick\u00fd k\u013e\u00fa\u010d na de\u0161ifrovanie obsahu HDCP ur\u010den\u00e9ho pre overovan\u00e9 zariadenie.<\/p>\n\n\n\n

Ke\u010f pou\u017e\u00edvate\u013e vyberie vstup HDMI na telev\u00edzore. Vysielacie zariadenie si vymen\u00ed k\u013e\u00fa\u010de s prij\u00edma\u010dom HDMI (telev\u00edzorom) na overenie pripojenia. Video sa m\u00f4\u017ee zobrazi\u0165 len vtedy, ak si zariadenia vymenili k\u013e\u00fa\u010de. Tento postup trv\u00e1 pribli\u017ene 10 sek\u00fand. Z tohto d\u00f4vodu sa prehr\u00e1vanie videa spust\u00ed s oneskoren\u00edm.<\/p>\n\n\n\n

Na implement\u00e1ciu funkcie HDCP pou\u017e\u00edvanej v portoch HDMI v telev\u00edzoroch sa na vytvorenie pripojenia cez HDMI pou\u017eil \u0161peci\u00e1lny program. Prv\u00e9 telev\u00edzory mali len jeden port HDMI, ktor\u00fd podporoval HDCP. To znamenalo, \u017ee filmy chr\u00e1nen\u00e9 proti kop\u00edrovaniu bolo mo\u017en\u00e9 sledova\u0165 len cez tento port. Nesk\u00f4r bola podpora HDCP implementovan\u00e1 do v\u0161etk\u00fdch portov HDMI.<\/p>\n\n\n\n

Bol vyvinut\u00fd \u0161peci\u00e1lny \u010dip, ktor\u00fd umo\u017enil nakonfigurova\u0165 pripojenie HDCP, aby sa skr\u00e1til \u010das potrebn\u00fd na r\u00fdchle prep\u00ednanie medzi portami. Ka\u017ed\u00fd port HDMI m\u00e1 \u010dip HDCP, ke\u010f sa k portu HDMI pripoj\u00ed ak\u00e9ko\u013evek zariadenie, spojenie sa vytvor\u00ed pomocou \u010dipu v porte, video je pripraven\u00e9 na zobrazenie na telev\u00edzore, ale nie je softv\u00e9rovo povolen\u00e9 na zobrazenie.<\/p>\n\n\n\n

Softv\u00e9r v telev\u00edzore funk\u010dne prep\u00edna medzi vstupmi HDMI. Ke\u010f\u017ee spojenie je u\u017e vytvoren\u00e9 s ka\u017ed\u00fdm zariaden\u00edm fyzicky pripojen\u00fdm k telev\u00edzoru. Pri prep\u00ednan\u00ed vstupu HDMI je pripojenie HDCP u\u017e vytvoren\u00e9, \u010das \u010dakania na zobrazenie obrazu na obrazovke telev\u00edzora po prepnut\u00ed na pr\u00edslu\u0161n\u00fd port je minim\u00e1lny. Obraz sa zobraz\u00ed u\u017e 1 sekundu po prepnut\u00ed na pr\u00edslu\u0161n\u00fd port.<\/p>\n\n\n\n

<\/a>Vysvetlenie prostriedkov Instaport<\/strong><\/h2>\n\n\n\n

Ak je na telev\u00edzore uveden\u00e9, \u017ee m\u00e1 funkciu Instaport, mali by ste vedie\u0165, \u017ee \u010das prep\u00ednania medzi pr\u00edjmom videa cez HDMI je 1 sekunda, \u010do je \u010das potrebn\u00fd na za\u010datie prenosu obrazu cez port HDMI. Spojenie HDCP je u\u017e vytvoren\u00e9 a obraz sa odosiela zo vstupu HDMI na obrazovku. \u010cip Quick Switch u\u017e m\u00e1 vytvoren\u00e9 spojenie HDCP medzi zariadeniami HDMI a sta\u010d\u00ed len povoli\u0165 port v nastaveniach telev\u00edzora.<\/p>\n","protected":false},"excerpt":{"rendered":"

\u010co je r\u00fdchly prep\u00edna\u010d HDMI R\u00fdchly prep\u00edna\u010d HDMI je r\u00fdchly sp\u00f4sob prep\u00ednania medzi pr\u00edjmom videa HDMI na telev\u00edzore. Mali by ste vedie\u0165, \u017ee v \u00e9re anal\u00f3gov\u00e9ho videa ste mohli telev\u00edzne programy vo\u013ene nahr\u00e1va\u0165 napr\u00edklad na videokazetu. Kvalita z\u00e1znamu bola priemern\u00e1 a technicky nebolo mo\u017en\u00e9 ochr\u00e1ni\u0165 vysielanie pred kop\u00edrovan\u00edm. Ke\u010f sa za\u010dala \u00e9ra digit\u00e1lneho videa a […]<\/p>\n","protected":false},"author":1,"featured_media":1530,"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":[86,26],"tags":[87],"class_list":{"0":"post-1529","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-technologia","8":"category-tv","9":"tag-technologia"},"_links":{"self":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/1529","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=1529"}],"version-history":[{"count":1,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/1529\/revisions"}],"predecessor-version":[{"id":1531,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/posts\/1529\/revisions\/1531"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media\/1530"}],"wp:attachment":[{"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/media?parent=1529"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/categories?post=1529"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/global.tab-tv.com\/sk\/wp-json\/wp\/v2\/tags?post=1529"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}