{"id":35405,"date":"2019-10-31T22:04:08","date_gmt":"2019-10-31T19:04:08","guid":{"rendered":"https:\/\/prohoster.info\/blog\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-9-golovnaya-stantsiya\/"},"modified":"2019-10-31T22:04:08","modified_gmt":"2019-10-31T19:04:08","slug":"seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-9-golovnaya-stantsiya","status":"publish","type":"post","link":"https:\/\/prohoster.info\/da\/blog\/news\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-9-golovnaya-stantsiya","title":{"rendered":"Kabel-tv-netv\u00e6rk til de mindste. Del 9: Hovedstationen","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Kabel-tv-netv\u00e6rk til de mindste. Del 9: Hovedstationen\" src=\"\/wp-content\/uploads\/2019\/06\/e2ecba3816d8e6d1e6b4a29c70d864e1.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nHovedstationen indsamler signaler fra flere kilder, behandler dem og sender dem ud til kabelnetv\u00e6rket.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<b class=\"spoiler_title\">Indhold af artikelserien<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449322\/\">Del 1: Overordnet arkitektur af KTV-netv\u00e6rket<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449902\/\">Del 2: Indhold og form af signalet<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450256\/\">Del 3: Den analoge komponent af signalet<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450258\/\">Del 4: Den digitale komponent af signalet<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450278\/\">Del 5: Koaksialt distributionsnet<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450452\/\">Del 6: RF-signalforst\u00e6rkere<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/454542\/\">Del 7: Optiske modtagere<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/455355\/\">Del 8: Optisk hovednetv\u00e6rk<\/a><\/noindex><\/li>\n<li>Del 9: Hovedstation<\/li>\n<li>Del 10: Fejlfinding p\u00e5 KTV-netv\u00e6rket<\/li>\n<\/ul>\n<p>\nDer er allerede en fantastisk artikel om hovedstationens opbygning p\u00e5 Habr: <noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/165643\/\">Hvad der er inde i en kabel-tv hovedstation<\/a><\/noindex>. Jeg vil ikke omskrive den med mine egne ord, men blot anbefale interesserede at l\u00e6se den. Beskrivelsen af, hvad jeg arbejder med, ville v\u00e6re mindre interessant, da vi ikke har s\u00e5 stort et udvalg af udstyr, og al signalbehandling udf\u00f8res af AppearTV chassis med forskellige udvidelseskort, hvis mangfoldighed g\u00f8r det muligt at rumme hele funktionen i et par fire-enhed chassis.<\/p>\n<p><img decoding=\"async\" alt=\"Kabel-tv-netv\u00e6rk til de mindste. Del 9: Hovedstationen\" src=\"\/wp-content\/uploads\/2019\/06\/d3ab4fefde30a84e8e802842b8f9f8ef.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\n<img decoding=\"async\" alt=\"Kabel-tv-netv\u00e6rk til de mindste. Del 9: Hovedstationen\" src=\"\/wp-content\/uploads\/2019\/06\/19e9cdaa190310cb7aac5d37434b3550.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Billede fra hjemmesiden <noindex><a rel=\"nofollow\" href=\"https:\/\/deps.ua\/katalog\/ip-strimeryi\/appear-tv-xc5000-5100.html\">deps.ua<\/a><\/noindex><\/i><\/p>\n<p>Disse enheder g\u00f8r det muligt at kontrollere alle processer via en funktionel webgr\u00e6nseflade, som afh\u00e6nger af det hardwareindhold, der er i chassiset.<br \/>\n<img decoding=\"async\" alt=\"Kabel-tv-netv\u00e6rk til de mindste. Del 9: Hovedstationen\" src=\"\/wp-content\/uploads\/2019\/06\/7badb1d32aad8d76825aa8ca6ed91fc4.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDerudover indsamler vi ikke det terrestriske signal, s\u00e5 vores antennepost ser nogenlunde s\u00e5dan ud:<br \/>\n<img decoding=\"async\" alt=\"Kabel-tv-netv\u00e6rk til de mindste. Del 9: Hovedstationen\" src=\"\/wp-content\/uploads\/2019\/06\/c01c936af6ece5a16f60f3f4321bcc7a.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<i>Billede fra forumet <noindex><a rel=\"nofollow\" href=\"https:\/\/www.chipmaker.ru\/topic\/178360\/?do=findComment&amp;comment=3719772\">chipmaker.ru<\/a><\/noindex> Jeg fik ikke lov til at dele et rigtigt billede af vores station.<\/i><\/p>\n<p>Det antal paraboler er n\u00f8dvendigt for at modtage kanaler fra flere satellitter samtidigt.<\/p>\n<p>Satellitsignalet er normalt beskyttet ved scrambling: en form for kryptering, hvor tegnene i sekvensen blandes if\u00f8lge en given algoritme. Dette kr\u00e6ver ikke stor beregningskraft og tid til udf\u00f8relse, hvilket betyder, at signalet behandles uden forsinkelser. I hardwareformen er abonnentens identifikator (selv hvis det er en udbyder, der videresender signalet til sit netv\u00e6rk) det velkendte kort med chip, som inds\u00e6ttes i en Conditional Access Module (CAM) med CI-interface, ligesom i enhver moderne tv.<br \/>\n<img decoding=\"async\" alt=\"Kabel-tv-netv\u00e6rk til de mindste. Del 9: Hovedstationen\" src=\"\/wp-content\/uploads\/2019\/06\/5d54790c4165b47f783ee1457a2baabc.png\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nDet er faktisk inden i modulet, at al matematiken udf\u00f8res, og kortet indeholder et s\u00e6t n\u00f8gler. Operat\u00f8ren kan kryptere str\u00f8mmen med de n\u00f8gler, som kortet kender (og som operat\u00f8ren selv har indskrevet i kortet) og dermed styre s\u00e6t af abonnementer helt ned til at frakoble kortet fra systemet ved at \u00e6ndre den prim\u00e6re 'operat\u00f8ridentifikator'. Dette er blot en generel beskrivelse af arbejdet i Conditional Access-systemer; der findes mange forskellige typer: p\u00e5 den ene side bliver de konstant hacket, mens algoritmerne p\u00e5 den anden side bliver mere komplekse, men det er en helt anden historie...<\/p>\n<p>Da operat\u00f8ren ogs\u00e5 tilbyder betalte kanalpakker i sit netv\u00e6rk, er det n\u00f8dvendigt at kode dem, f\u00f8r de sendes i netv\u00e6rket. Denne opgave udf\u00f8res af udstyr fra en tredjepartsudbyder af systemer til betinget adgang, som leverer dette som en tjeneste til operat\u00f8ren. Udstyret, der er installeret p\u00e5 hovedstationen, sikrer driften af systemet til betinget adgang til indhold: b\u00e5de kryptering og kontrol af n\u00f8gler, der er indtastet i smartkortene.<\/p>\n<p>P.S. Ingen har hjulpet mig med artiklen om DOCSIS, hvis nogen har lyst \u2014 skriv endelig.<br \/>\n<br \/>Kilde: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/455858\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0413\u043e\u043b\u043e\u0432\u043d\u0430\u044f \u0441\u0442\u0430\u043d\u0446\u0438\u044f \u0441\u043e\u0431\u0438\u0440\u0430\u0435\u0442 \u0441\u0438\u0433\u043d\u0430\u043b\u044b \u0441 \u043d\u0435\u0441\u043a\u043e\u043b\u044c\u043a\u0438\u0445 \u0438\u0441\u0442\u043e\u0447\u043d\u0438\u043a\u043e\u0432, \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u0438\u0445 \u0438 \u0432\u0435\u0449\u0430\u0435\u0442 \u0432 \u043a\u0430\u0431\u0435\u043b\u044c\u043d\u0443\u044e \u0441\u0435\u0442\u044c. \u0421\u043e\u0434\u0435\u0440\u0436\u0430\u043d\u0438\u0435 \u0441\u0435\u0440\u0438\u0438 \u0441\u0442\u0430\u0442\u0435\u0439 \u0427\u0430\u0441\u0442\u044c 1: \u041e\u0431\u0449\u0430\u044f \u0430\u0440\u0445\u0438\u0442\u0435\u043a\u0442\u0443\u0440\u0430 \u0441\u0435\u0442\u0438 \u041a\u0422\u0412 \u0427\u0430\u0441\u0442\u044c 2: \u0421\u043e\u0441\u0442\u0430\u0432 \u0438 \u0444\u043e\u0440\u043c\u0430 \u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0427\u0430\u0441\u0442\u044c 3: \u0410\u043d\u0430\u043b\u043e\u0433\u043e\u0432\u0430\u044f \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0427\u0430\u0441\u0442\u044c 4: \u0426\u0438\u0444\u0440\u043e\u0432\u0430\u044f \u0441\u043e\u0441\u0442\u0430\u0432\u043b\u044f\u044e\u0449\u0430\u044f \u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0427\u0430\u0441\u0442\u044c 5: \u041a\u043e\u0430\u043a\u0441\u0438\u0430\u043b\u044c\u043d\u0430\u044f \u0440\u0430\u0441\u043f\u0440\u0435\u0434\u0435\u043b\u0438\u0442\u0435\u043b\u044c\u043d\u0430\u044f \u0441\u0435\u0442\u044c \u0427\u0430\u0441\u0442\u044c 6: \u0423\u0441\u0438\u043b\u0438\u0442\u0435\u043b\u0438 RF-\u0441\u0438\u0433\u043d\u0430\u043b\u0430 \u0427\u0430\u0441\u0442\u044c 7: \u041e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u043f\u0440\u0438\u0451\u043c\u043d\u0438\u043a\u0438 \u0427\u0430\u0441\u0442\u044c 8: \u041e\u043f\u0442\u0438\u0447\u0435\u0441\u043a\u0430\u044f [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26561,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-35405","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - 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