{"id":33495,"date":"2019-10-31T21:52:52","date_gmt":"2019-10-31T18:52:52","guid":{"rendered":"https:\/\/prohoster.info\/blog\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-4-tsifrovaya-sostavlyayushhaya-signala\/"},"modified":"2019-10-31T21:52:52","modified_gmt":"2019-10-31T18:52:52","slug":"seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-4-tsifrovaya-sostavlyayushhaya-signala","status":"publish","type":"post","link":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-4-tsifrovaya-sostavlyayushhaya-signala","title":{"rendered":"Kabelov\u00e9 televizn\u00ed s\u00edt\u011b pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed \u010d\u00e1st sign\u00e1lu","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Kabelov\u00e9 televizn\u00ed s\u00edt\u011b pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed \u010d\u00e1st sign\u00e1lu\" src=\"\/wp-content\/uploads\/2019\/05\/9d5b75de9baed1844b204cbc3e4b653a.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV\u0161ichni dob\u0159e v\u00edme, \u017ee okoln\u00ed sv\u011bt techniky je digit\u00e1ln\u00ed, nebo se k tomu sna\u017e\u00ed sm\u011b\u0159ovat. Digit\u00e1ln\u00ed televizn\u00ed vys\u00edl\u00e1n\u00ed nen\u00ed rozhodn\u011b novinka, ale pokud v\u00e1s to dosud speci\u00e1ln\u011b nezaj\u00edmalo, mohly by v\u00e1s p\u0159ekvapit technologie, kter\u00e9 mu p\u0159\u00edslu\u0161\u00ed.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\n<b class=\"spoiler_title\">Obsah s\u00e9rie \u010dl\u00e1nk\u016f<\/b><\/p>\n<ul>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449322\/\">\u010c\u00e1st 1: Obecn\u00e1 architektura s\u00edt\u011b KTV<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/449902\/\">\u010c\u00e1st 2: Slo\u017een\u00ed a forma sign\u00e1lu<\/a><\/noindex><\/li>\n<li><noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450256\/\">\u010c\u00e1st 3: Analogov\u00e1 slo\u017eka sign\u00e1lu<\/a><\/noindex><\/li>\n<li>\u010c\u00e1st 4: Digit\u00e1ln\u00ed slo\u017eka sign\u00e1lu<\/li>\n<li>\u010c\u00e1st 5: Koaxi\u00e1ln\u00ed distribu\u010dn\u00ed s\u00ed\u0165<\/li>\n<li>\u010c\u00e1st 6: RF sign\u00e1ln\u00ed zesilova\u010de<\/li>\n<li>\u010c\u00e1st 7: Optick\u00e9 p\u0159ij\u00edma\u010de<\/li>\n<li>\u010c\u00e1st 8: Optick\u00e1 p\u00e1te\u0159n\u00ed s\u00ed\u0165<\/li>\n<li>\u010c\u00e1st 9: Hlavn\u00ed stanice<\/li>\n<li>\u010c\u00e1st 10: Diagnostika a \u0159e\u0161en\u00ed probl\u00e9m\u016f na KTV s\u00edti<\/li>\n<\/ul>\n<h1>Slo\u017een\u00ed digit\u00e1ln\u00edho televizn\u00edho sign\u00e1lu<\/h1>\n<p>\nDigit\u00e1ln\u00ed televizn\u00ed sign\u00e1l p\u0159edstavuje transportn\u00ed tok r\u016fzn\u00fdch verz\u00ed MPEG (n\u011bkdy i jin\u00fdch kodek\u016f), p\u0159en\u00e1\u0161en\u00fd r\u00e1diov\u00fdm sign\u00e1lem s pou\u017eit\u00edm kvadraturn\u00ed amplitudov\u00e9 modulace QAM r\u016fzn\u00fdch \u00farovn\u00ed. Ka\u017ed\u00e9mu telekomunik\u00e1torovi by m\u011blo b\u00fdt jasn\u00e9, co to znamen\u00e1, proto uvedu pouze gif z <noindex><a rel=\"nofollow\" href=\"https:\/\/en.wikipedia.org\/wiki\/File:QAM16_Demonstration.gif\">Wikipedie<\/a><\/noindex>, kter\u00fd, douf\u00e1m, poskytne pochopen\u00ed, co to vlastn\u011b je pro ty, kdo se o to dosud nezaj\u00edmali:<\/p>\n<p><img decoding=\"async\" alt=\"Kabelov\u00e9 televizn\u00ed s\u00edt\u011b pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed \u010d\u00e1st sign\u00e1lu\" src=\"\/wp-content\/uploads\/2019\/05\/283d4b7a8b196962c4cceb63489a2b10.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTakov\u00e1 modulace se v n\u011bjak\u00e9 podob\u011b pou\u017e\u00edv\u00e1 nejen pro \u201eteleanachronismus\u201c, ale i pro v\u0161echny, kter\u00e9 jsou na vrcholu technologick\u00fdch syst\u00e9m\u016f pro p\u0159enos dat. Rychlost digit\u00e1ln\u00edho toku v \"ant\u00e9nn\u00edm\" kabelu dosahuje stovek megabit\u016f!<\/p>\n<h1>Parametry digit\u00e1ln\u00edho sign\u00e1lu<\/h1>\n<p>\nPomoc\u00ed p\u0159\u00edstroje Deviser DS2400T v re\u017eimu zobrazen\u00ed parametr\u016f digit\u00e1ln\u00edho sign\u00e1lu budeme moci vid\u011bt, jak to ve skute\u010dnosti vypad\u00e1:<\/p>\n<p><img decoding=\"async\" alt=\"Kabelov\u00e9 televizn\u00ed s\u00edt\u011b pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed \u010d\u00e1st sign\u00e1lu\" src=\"\/wp-content\/uploads\/2019\/05\/68b91d37fad05b2ed6e3bc707fa26113.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nV na\u0161\u00ed s\u00edti jsou p\u0159\u00edtomny sign\u00e1ly t\u0159\u00ed standard\u016f: DVB-T, DVB-T2 a DVB-C. Prozkoum\u00e1vejme je postupn\u011b.<\/p>\n<h2>DVB-T<\/h2>\n<p>\nTento standard se nestal hlavn\u00edm v na\u0161\u00ed zemi, ustoupil druh\u00e9 verzi, ale je zcela pou\u017eiteln\u00fd pro oper\u00e1tora, proto\u017ee p\u0159ij\u00edma\u010de DVB-T2 jsou zp\u011btn\u011b kompatibiln\u00ed se standardem prvn\u00ed generace, co\u017e znamen\u00e1, \u017ee abonent m\u016f\u017ee p\u0159ij\u00edmat tento sign\u00e1l na prakticky jak\u00e9mkoli digit\u00e1ln\u00edm televizoru bez dal\u0161\u00edch set-top box\u016f. Krom\u011b toho standard ur\u010den\u00fd pro p\u0159enos vzduchem (p\u00edsmeno T znamen\u00e1 Terrestrial, vzdu\u0161n\u00fd) m\u00e1 tak dobrou odolnost proti ru\u0161en\u00ed a redundanci, \u017ee n\u011bkdy funguje tam, kde z n\u011bjak\u00e9ho d\u016fvodu neproch\u00e1z\u00ed analogov\u00fd sign\u00e1l.<\/p>\n<p><img decoding=\"async\" alt=\"Kabelov\u00e9 televizn\u00ed s\u00edt\u011b pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed \u010d\u00e1st sign\u00e1lu\" src=\"\/wp-content\/uploads\/2019\/05\/d2e68060fe9e9d7220fcbda65a8d76ac.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nNa obrazovce za\u0159\u00edzen\u00ed m\u016f\u017eeme pozorovat, jak se tvo\u0159\u00ed souhv\u011bzd\u00ed 64QAM (standard podporuje QPSK, 16QAM, 64QAM). Je patrn\u00e9, \u017ee za re\u00e1ln\u00fdch podm\u00ednek body rozhodn\u011b nespl\u00fdvaj\u00ed do jednoho, ale p\u0159ich\u00e1zej\u00ed s ur\u010ditou rozpt\u00fdlen\u00edm. To je norm\u00e1ln\u00ed, dokud dekod\u00e9r m\u016f\u017ee ur\u010dit, k jak\u00e9mu \u010dtverci se pr\u00e1v\u011b p\u0159il\u00e9taj\u00edc\u00ed bod vztahuje, ale i na uveden\u00e9m obr\u00e1zku jsou vid\u011bt oblasti, kde se nach\u00e1z\u00ed na hranici nebo bl\u00edzko n\u00ed. Pomoc\u00ed tohoto obrazu lze rychle \u201eodhadem\u201c ur\u010dit kvalitu sign\u00e1lu: p\u0159i \u0161patn\u00e9 pr\u00e1ci zesilova\u010de, nap\u0159\u00edklad, se body rozm\u00eds\u0165uj\u00ed chaoticky a televizor nen\u00ed schopen sestavit obr\u00e1zek z p\u0159ijat\u00fdch dat: \u201epixelizuje\u201c, nebo dokonce zcela zamrzne. N\u011bkdy se st\u00e1v\u00e1, \u017ee procesor zesilova\u010de \u201ezapomene\u201c p\u0159idat do sign\u00e1lu jednu z komponent (amplitudu nebo f\u00e1zi). V takov\u00fdch p\u0159\u00edpadech lze na obrazovce p\u0159\u00edstroje vid\u011bt kruh nebo prstenec o velikosti cel\u00e9ho pole. Dv\u011b body mimo hlavn\u00ed pole jsou oporn\u00e9 pro p\u0159ij\u00edma\u010d a nenesou informace.<\/p>\n<p>V lev\u00e9 \u010d\u00e1sti obrazovky pod \u010d\u00edslem kan\u00e1lu vid\u00edme kvantitativn\u00ed parametry:<\/p>\n<p>\u00darove\u0148 sign\u00e1lu (<b>redicted Frame)<\/b>) ve stejn\u00fdch dBmV jako pro analog, av\u0161ak pro digit\u00e1ln\u00ed sign\u00e1l GOST reguluje pouze 50dBmV na vstupu do p\u0159ij\u00edma\u010de. To znamen\u00e1, \u017ee na \u00fasec\u00edch s vy\u0161\u0161\u00edm \u00fatlumem bude \u201edigit\u00e1l\u201c fungovat l\u00e9pe ne\u017e analog.<\/p>\n<p>Hodnota modul\u00e1torov\u00fdch chyb (<b>MER<\/b>) ukazuje, jak velmi zkreslen\u00fd sign\u00e1l p\u0159ij\u00edm\u00e1me, tedy jak daleko se p\u0159il\u00e9taj\u00edc\u00ed bod m\u016f\u017ee nach\u00e1zet od st\u0159edu \u010dtverce. Tento parametr je podobn\u00fd pom\u011bru \u201esign\u00e1l\/\u0161um\u201c z analogov\u00e9ho syst\u00e9mu, norm\u00e1ln\u00ed hodnota pro 64QAM je od 28dB. Zde je dob\u0159e vid\u011bt, \u017ee v\u00fdznamn\u00e9 odchylky na uveden\u00e9m obr\u00e1zku odpov\u00eddaj\u00ed kvalit\u011b nad normou: v tomhle je odolnost digit\u00e1ln\u00edho sign\u00e1lu v\u016f\u010di ru\u0161en\u00ed.<\/p>\n<p>Po\u010det chyb v p\u0159ijat\u00e9m sign\u00e1lu (<b>CBER<\/b>) \u2014 po\u010det chyb v sign\u00e1lu p\u0159ed zpracov\u00e1n\u00edm jak\u00fdmikoliv opravn\u00fdmi algoritmy.<\/p>\n<p>Po\u010det chyb po pr\u00e1ci dekod\u00e9ru Viterbiho (<b>VBER<\/b>) \u2014 v\u00fdsledek pr\u00e1ce dekod\u00e9ru, kter\u00fd vyu\u017e\u00edv\u00e1 nadbyte\u010dn\u00e9 informace k obnov\u011b chyb v sign\u00e1lu. Oba tyto parametry se m\u011b\u0159\u00ed v \u201eks na po\u010det p\u0159ijat\u00fdch\u201c. Aby p\u0159\u00edstroj uk\u00e1zal po\u010det chyb men\u0161\u00ed ne\u017e jedna na sto tis\u00edc nebo deset mili\u00f3n\u016f (jak je uvedeno na obr\u00e1zku), mus\u00ed p\u0159ijmout t\u011bch deset mili\u00f3n\u016f bit\u016f, co\u017e na jednom kan\u00e1lu zabere ur\u010ditou dobu, tak\u017ee v\u00fdsledek m\u011b\u0159en\u00ed se neobjev\u00ed okam\u017eit\u011b a m\u016f\u017ee b\u00fdt zpo\u010d\u00e1tku \u0161patn\u00fd (nap\u0159\u00edklad E-03), ale po n\u011bkolika sekund\u00e1ch dos\u00e1hnout skv\u011bl\u00e9ho parametru.<\/p>\n<h2>DVB-T2<\/h2>\n<p>\nStandard digit\u00e1ln\u00edho pozemsk\u00e9ho vys\u00edl\u00e1n\u00ed p\u0159ijat\u00fd v Rusku m\u016f\u017ee b\u00fdt tak\u00e9 p\u0159en\u00e1\u0161en kabelem. Tvar souhv\u011bzd\u00ed m\u016f\u017ee na prvn\u00ed pohled trochu p\u0159ekvapit:<\/p>\n<p><img decoding=\"async\" alt=\"Kabelov\u00e9 televizn\u00ed s\u00edt\u011b pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed \u010d\u00e1st sign\u00e1lu\" src=\"\/wp-content\/uploads\/2019\/05\/3122eede760f4aaa34b924f34fdcd4b4.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nTento \u00fahel nav\u00edc zvy\u0161uje odolnost proti ru\u0161en\u00ed, proto\u017ee p\u0159ij\u00edma\u010d v\u00ed, \u017ee souhv\u011bzd\u00ed by m\u011blo b\u00fdt oto\u010deno pod dan\u00fdm \u00fahlem, co\u017e znamen\u00e1, \u017ee lze filtrovat to, co p\u0159ich\u00e1z\u00ed bez zadan\u00e9ho posunu. Zde vid\u00edme, \u017ee pro tento standard jsou normy bitov\u00fdch chyb o \u0159\u00e1d vy\u0161\u0161\u00ed a chyby v sign\u00e1lu p\u0159ed zpracov\u00e1n\u00edm ji\u017e nep\u0159ekra\u010duj\u00ed m\u011b\u0159\u00edtka a p\u0159edstavuj\u00ed zcela re\u00e1ln\u00fdch 8,6 na milion. K jejich oprav\u011b se pou\u017e\u00edv\u00e1 dekod\u00e9r. <b>LDPC<\/b>, proto se tento parametr naz\u00fdv\u00e1 LBER.<br \/>\nD\u00edky vy\u0161\u0161\u00ed odolnosti proti ru\u0161en\u00ed tento standard podporuje \u00farove\u0148 modulace 256QAM, ale v sou\u010dasn\u00e9 dob\u011b se v pozemn\u00edm vys\u00edl\u00e1n\u00ed pou\u017e\u00edv\u00e1 pouze 64QAM.<\/p>\n<h2>DVB-C<\/h2>\n<p>\nTento standard byl p\u016fvodn\u011b navr\u017een pro p\u0159enos kabelem (C \u2014 Cable) \u2014 m\u00e9dium, kter\u00e9 je mnohem stabiln\u011bj\u0161\u00ed ne\u017e vzduch, co\u017e umo\u017e\u0148uje vyu\u017e\u00edt vy\u0161\u0161\u00ed m\u00edru modulace ne\u017e DVB-T, a tedy p\u0159en\u00e1\u0161et v\u011bt\u0161\u00ed objem informac\u00ed, ani\u017e by se p\u0159i tom pou\u017e\u00edvalo slo\u017eit\u00e9 k\u00f3dov\u00e1n\u00ed.<\/p>\n<p><img decoding=\"async\" alt=\"Kabelov\u00e9 televizn\u00ed s\u00edt\u011b pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed \u010d\u00e1st sign\u00e1lu\" src=\"\/wp-content\/uploads\/2019\/05\/33c27eed12c0c66e35eae343710039f2.jpeg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<br \/>\nZde vid\u00edme souhv\u011bzd\u00ed 256QAM. \u010ctverc\u016f p\u0159ibylo, jejich velikost se zmen\u0161ila. Pravd\u011bpodobnost chyby se zv\u00fd\u0161ila, co\u017e znamen\u00e1, \u017ee pro p\u0159enos takov\u00e9ho sign\u00e1lu je t\u0159eba spolehliv\u011bj\u0161\u00ed prost\u0159ed\u00ed (nebo slo\u017eit\u011bj\u0161\u00ed k\u00f3dov\u00e1n\u00ed, jako v DVB-T2). Takov\u00fd sign\u00e1l se m\u016f\u017ee \u201erozpadat\u201c tam, kde pracuj\u00ed analog a DVB-T\/T2, av\u0161ak m\u00e1 tak\u00e9 rezervu odolnosti proti ru\u0161en\u00ed a algoritmy pro opravu chyb.<\/p>\n<p>Z d\u016fvodu vy\u0161\u0161\u00ed pravd\u011bpodobnosti chyby je parametr MER pro 256-QAM normalizov\u00e1n ji\u017e na 32dB.<\/p>\n<p>Po\u010det chybn\u011b p\u0159enesen\u00fdch bit\u016f vzrostl o dal\u0161\u00ed \u0159\u00e1d a nyn\u00ed \u010din\u00ed jeden chybn\u011b p\u0159enesen\u00fd bit na miliardu, ale i kdyby jich byly stovky milion\u016f (PRE-BER ~E-07-8), dekod\u00e9r Reed-Solomon pou\u017eit\u00fd v t\u00e9to norm\u011b odstran\u00ed v\u0161echny chyby.<br \/>\n<br \/>Zdroj: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/450258\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0412\u0441\u0435 \u043c\u044b \u043f\u0440\u0435\u043a\u0440\u0430\u0441\u043d\u043e \u0437\u043d\u0430\u0435\u043c, \u0447\u0442\u043e \u043c\u0438\u0440 \u0442\u0435\u0445\u043d\u0438\u043a\u0438 \u0432\u043e\u043a\u0440\u0443\u0433 \u2014 \u0446\u0438\u0444\u0440\u043e\u0432\u043e\u0439, \u043b\u0438\u0431\u043e \u0441\u0442\u0440\u0435\u043c\u0438\u0442\u0441\u044f \u043a \u044d\u0442\u043e\u043c\u0443. \u0426\u0438\u0444\u0440\u043e\u0432\u043e\u0435 \u0442\u0435\u043b\u0435\u0432\u0435\u0449\u0430\u043d\u0438\u0435 \u2014 \u0434\u0430\u043b\u0435\u043a\u043e \u043d\u0435 \u043d\u043e\u0432\u043e\u0441\u0442\u044c, \u043e\u0434\u043d\u0430\u043a\u043e \u0435\u0441\u043b\u0438 \u0432\u044b \u043d\u0435 \u0438\u043d\u0442\u0435\u0440\u0435\u0441\u043e\u0432\u0430\u043b\u0438\u0441\u044c \u044d\u0442\u0438\u043c \u0441\u043f\u0435\u0446\u0438\u0430\u043b\u044c\u043d\u043e, \u0434\u043b\u044f \u0432\u0430\u0441 \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u043d\u0435\u043e\u0436\u0438\u0434\u0430\u043d\u043d\u044b\u043c\u0438 \u043f\u0440\u0438\u0441\u0443\u0449\u0438\u0435 \u0435\u043c\u0443 \u0442\u0435\u0445\u043d\u043e\u043b\u043e\u0433\u0438\u0438. \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 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":25196,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-33495","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.3 - aioseo.com -->\n\t<meta name=\"robots\" content=\"max-image-preview:large\" \/>\n\t<meta name=\"author\" content=\"Yuri Gagarin\"\/>\n\t<link rel=\"canonical\" href=\"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-4-tsifrovaya-sostavlyayushhaya-signala\" \/>\n\t\t<meta name=\"generator\" content=\"All in One SEO (AIOSEO) 5.0.3\" \/>\n\t\t<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n\t\t<meta property=\"og:site_name\" content=\"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b\" \/>\n\t\t<meta property=\"og:type\" content=\"article\" \/>\n\t\t<meta property=\"og:title\" content=\"\ud83e\udd47\u0421\u0435\u0442\u0438 \u043a\u0430\u0431\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0432\u0438\u0434\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u0441\u0430\u043c\u044b\u0445 \u043c\u0430\u043b\u0435\u043d\u044c\u043a\u0438\u0445. \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 | ProHoster\" \/>\n\t\t<meta property=\"og:url\" content=\"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-4-tsifrovaya-sostavlyayushhaya-signala\" \/>\n\t\t<meta property=\"og:image\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:secure_url\" content=\"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg\" \/>\n\t\t<meta property=\"og:image:width\" content=\"350\" \/>\n\t\t<meta property=\"og:image:height\" content=\"350\" \/>\n\t\t<meta property=\"article:published_time\" content=\"2019-10-31T18:52:52+00:00\" \/>\n\t\t<meta property=\"article:modified_time\" content=\"2019-10-31T18:52:52+00:00\" \/>\n\t\t<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<meta property=\"article:author\" content=\"https:\/\/www.facebook.com\/prohoster\" \/>\n\t\t<!-- All in One SEO -->\n\n","aioseo_head_json":{"title":"\ud83e\udd47Kabelov\u00e9 televize pro nejmen\u0161\u00ed. \u010c\u00e1st 4: Digit\u00e1ln\u00ed slo\u017eka sign\u00e1lu | ProHoster","description":"","canonical_url":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-4-tsifrovaya-sostavlyayushhaya-signala","robots":"max-image-preview:large","keywords":"","webmasterTools":{"miscellaneous":""},"schema":null,"og:locale":"cs_CZ","og:site_name":"ProHoster | \u041a\u0443\u043f\u0438\u0442\u044c \u043d\u0430\u0434\u0435\u0436\u043d\u044b\u0439 \u0445\u043e\u0441\u0442\u0438\u043d\u0433 \u0434\u043b\u044f \u0441\u0430\u0439\u0442\u043e\u0432 \u0441 \u0437\u0430\u0449\u0438\u0442\u043e\u0439 \u043e\u0442 DDoS, VPS VDS \u0441\u0435\u0440\u0432\u0435\u0440\u044b","og:type":"article","og:title":"\ud83e\udd47\u0421\u0435\u0442\u0438 \u043a\u0430\u0431\u0435\u043b\u044c\u043d\u043e\u0433\u043e \u0442\u0435\u043b\u0435\u0432\u0438\u0434\u0435\u043d\u0438\u044f \u0434\u043b\u044f \u0441\u0430\u043c\u044b\u0445 \u043c\u0430\u043b\u0435\u043d\u044c\u043a\u0438\u0445. \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 | ProHoster","og:url":"https:\/\/prohoster.info\/cs\/blog\/administrirovanie\/seti-kabelnogo-televideniya-dlya-samyh-malenkih-chast-4-tsifrovaya-sostavlyayushhaya-signala","og:image":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:secure_url":"https:\/\/prohoster.info\/wp-content\/uploads\/2021\/11\/logo-350.jpg","og:image:width":350,"og:image:height":350,"article:published_time":"2019-10-31T18:52:52+00:00","article:modified_time":"2019-10-31T18:52:52+00:00","article:publisher":"https:\/\/www.facebook.com\/prohoster","article:author":"https:\/\/www.facebook.com\/prohoster"},"aioseo_meta_data":{"post_id":"33495","title":null,"description":null,"keywords":null,"keyphrases":null,"primary_term":null,"canonical_url":null,"og_title":null,"og_description":null,"og_object_type":"default","og_image_type":"default","og_image_url":null,"og_image_width":null,"og_image_height":null,"og_image_custom_url":null,"og_image_custom_fields":null,"og_video":null,"og_custom_url":null,"og_article_section":null,"og_article_tags":null,"twitter_use_og":false,"twitter_card":"default","twitter_image_type":"default","twitter_image_url":null,"twitter_image_custom_url":null,"twitter_image_custom_fields":null,"twitter_title":null,"twitter_description":null,"schema":{"blockGraphs":[],"customGraphs":[],"default":{"data":{"Article":[],"Course":[],"Dataset":[],"FAQPage":[],"Movie":[],"Person":[],"Product":[],"ProductReview":[],"Car":[],"Recipe":[],"Service":[],"SoftwareApplication":[],"WebPage":[]},"graphName":"","isEnabled":true},"graphs":[]},"schema_type":null,"schema_type_options":null,"pillar_content":false,"robots_default":true,"robots_noindex":false,"robots_noarchive":false,"robots_nosnippet":false,"robots_nofollow":false,"robots_noimageindex":false,"robots_noodp":false,"robots_notranslate":false,"robots_max_snippet":null,"robots_max_videopreview":null,"robots_max_imagepreview":"large","priority":null,"frequency":null,"local_seo":null,"seo_analyzer_scan_date":"2026-01-21 15:30:22","breadcrumb_settings":null,"limit_modified_date":false,"reviewed_by":null,"ai":null,"created":"2021-03-01 02:39:23","updated":"2026-01-21 15:30:22","focus_keyword":null,"additional_keywords":null,"truseo_locale":null},"gt_translate_keys":[{"key":"link","format":"url"}],"_links":{"self":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/33495","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/comments?post=33495"}],"version-history":[{"count":0,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/posts\/33495\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media\/25196"}],"wp:attachment":[{"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/media?parent=33495"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/categories?post=33495"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/prohoster.info\/cs\/wp-json\/wp\/v2\/tags?post=33495"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}