{"id":96148,"date":"2023-01-25T06:03:31","date_gmt":"2023-01-25T05:03:31","guid":{"rendered":"https:\/\/botland.com.pl\/blog\/jak-dziala-bluetooth-zasieg-roznice\/"},"modified":"2024-11-29T15:05:26","modified_gmt":"2024-11-29T14:05:26","slug":"jak-funguje-bluetooth-dosah-rozdily","status":"publish","type":"post","link":"https:\/\/botland.cz\/blog\/jak-funguje-bluetooth-dosah-rozdily\/","title":{"rendered":"Jak funguje Bluetooth – dosah, rozd\u00edly"},"content":{"rendered":"\u010cas \u010dten\u00ed:<\/span> 6<\/span> min.<\/span><\/span>\t\t
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Jak funguje Bluetooth - dosah, rozd\u00edly<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nNe\u017e sp\u00e1rujete sv\u016fj chytr\u00fd telefon s nov\u00fdmi sluch\u00e1tky, vyplat\u00ed se zjistit, co to obn\u00e1\u0161\u00ed! Pod\u00edvejte se tedy, jak Bluetooth funguje! \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bluetooth - bezdr\u00e1tov\u00fd komunika\u010dn\u00ed protokol\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nV tomto \u010dl\u00e1nku jsou uvedeny z\u00e1kladn\u00ed informace o Bluetooth, popul\u00e1rn\u00edm protokolu pro bezdr\u00e1tov\u00fd p\u0159enos dat na kr\u00e1tk\u00e9 vzd\u00e1lenosti, kter\u00fd se pou\u017e\u00edv\u00e1 ve spot\u0159ebn\u00ed i profesion\u00e1ln\u00ed elektronice. Text se zab\u00fdv\u00e1 parametry r\u016fzn\u00fdch generac\u00ed technologie Bluetooth a jejich v\u00fdkonov\u00fdmi t\u0159\u00eddami. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Co je to Bluetooth?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nNe\u017e p\u0159ejdeme k popisu principu Bluetooth, uvedeme obecn\u00fd p\u0159ehled t\u00e9to technologie. Bluetooth je bezdr\u00e1tov\u00fd komunika\u010dn\u00ed protokol s n\u00edzkou spot\u0159ebou energie, kter\u00fd pracuje na r\u00e1diov\u00fdch vln\u00e1ch ve frekven\u010dn\u00edm rozsahu 2400 MHz a\u017e 2485 MHz. V sou\u010dasn\u00e9 dob\u011b je Bluetooth standardn\u00ed sou\u010d\u00e1st\u00ed v\u011bt\u0161iny za\u0159\u00edzen\u00ed spot\u0159ebn\u00ed elektroniky na trhu. Komunikace Bluetooth se pou\u017e\u00edv\u00e1 tak\u00e9 v mobiln\u00edch telefonech – pro poslech hudby ve sluch\u00e1tk\u00e1ch nebo extern\u00edch reproduktorech lze zvuk p\u0159en\u00e1\u0161et bezdr\u00e1tov\u011b, ani\u017e by bylo nutn\u00e9 sahat po audiokabelu s p\u0159\u00edpadn\u00fdmi adapt\u00e9ry. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t

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Technologii Bluetooth najdete ve v\u011bt\u0161in\u011b nov\u00e9 spot\u0159ebn\u00ed elektroniky.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Odkud se vzal n\u00e1zev Bluetooth?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nNa prvn\u00ed pohled nen\u00ed n\u00e1zev “Bluetooth” spojen s elektronikou – stejn\u011b jako n\u00e1zvy popul\u00e1rn\u00edch minipo\u010d\u00edta\u010d\u016f, jako je “Raspberry Pi” nebo “Arduino” (mimochodem, n\u011bkter\u00e9 modely tak\u00e9 vyu\u017e\u00edvaj\u00ed technologii Bluetooth). Tyto n\u00e1zvy v\u0161ak nevznikly n\u00e1hodou a za ka\u017ed\u00fdm z nich se skr\u00fdv\u00e1 n\u011bjak\u00fd p\u0159\u00edb\u011bh. N\u00e1zev “Bluetooth” poch\u00e1z\u00ed z p\u0159ezd\u00edvky dlouholet\u00e9ho kr\u00e1le D\u00e1nska a pozd\u011bji tak\u00e9 Norska a Sk\u00e5ne (dne\u0161n\u00ed ji\u017en\u00ed \u0160v\u00e9dsko) Haralda Gormssona, zn\u00e1m\u00e9ho tak\u00e9 jako Harald Modrozub\u00fd (staroseversky Haraldr Bl\u00e1t\u01ebnnn Gormsson), kter\u00fd \u017eil v letech 911-986. Kr\u00e1lova p\u0159ezd\u00edvka vznikla d\u00edky tomu, \u017ee jeden z jeho zub\u016f byl modr\u00fd, co\u017e byl n\u00e1sledek zran\u011bn\u00ed utrp\u011bn\u00e9ho v poty\u010dce. Zaj\u00edmav\u00e9 je, \u017ee tuto p\u0159ezd\u00edvku dostal kr\u00e1l Gormsson a\u017e posmrtn\u011b. Kr\u00e1l se proslavil p\u0159ijet\u00edm k\u0159tu D\u00e1nskem v roce 965 (p\u0159esn\u011b rok p\u0159ed k\u0159tem Polska) a m\u00edrov\u00fdm sjednocen\u00edm Norska. T\u00edm to v\u0161ak nekon\u010d\u00ed! Logo Bluetooth je tak\u00e9 inspirov\u00e1no vl\u00e1dou kr\u00e1le Haralda Bluetooth – odkazuje na staroseversk\u00e9 p\u00edsmo, tedy runy na sk\u00e1le. Vzniklo spojen\u00edm p\u00edsmen haglaz (\u16bc) a berkanan (\u16d2), kter\u00e1 odkazuj\u00ed na p\u00edsmena latinsk\u00e9 abecedy, v tomto po\u0159ad\u00ed: “H” a “B”. D\u00e1 se \u0159\u00edci, \u017ee kr\u00e1l Harald Bluetooth vedl ke sjednocen\u00ed D\u00e1nska a Norska a jeho odkaz nese mnoho lid\u00ed po cel\u00e9m sv\u011bt\u011b t\u00edm, \u017ee si ka\u017ed\u00fd den sp\u00e1ruj\u00ed sluch\u00e1tka s chytr\u00fdm telefonem! \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bluetooth - prvn\u00ed generace (1999)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nP\u016fvodn\u011b bylo rozhran\u00ed Bluetooth vyvinuto jako n\u00e1hrada s\u00e9riov\u00e9ho portu RS-232, kter\u00fd v po\u010d\u00edta\u010d\u00edch PC umo\u017e\u0148oval p\u0159ipojen\u00ed extern\u00edch za\u0159\u00edzen\u00ed, jako jsou modemy nebo tisk\u00e1rny. Dal\u0161\u00ed v\u00fdvoj prvn\u00ed verze Bluetooth vedl k v\u00fdvoji verze 1.2, kter\u00e1 se dostala do konstrukce za\u0159\u00edzen\u00ed, jako jsou bezdr\u00e1tov\u00e1 sluch\u00e1tka, mobiln\u00ed telefony, notebooky, hands-free sady do automobil\u016f a tak\u00e9 digit\u00e1ln\u00ed fotoapar\u00e1ty. Verze 1.0a a 1.0b umo\u017e\u0148ovaly p\u0159enos dat rychlost\u00ed a\u017e p\u0159ibli\u017en\u011b 732 kb\/s s maxim\u00e1ln\u00edm dosahem a\u017e 3 m. Verze 1.2 naopak zv\u00fd\u0161ila propustnost dat na 1 Mb\/s a zkr\u00e1tila dobu detekce a p\u00e1rov\u00e1n\u00ed za\u0159\u00edzen\u00ed podporuj\u00edc\u00edch tuto verzi Bluetooth. Krom\u011b toho byl vylep\u0161en rozptyl spektra sign\u00e1lu (sn\u00ed\u017een\u00ed vlivu ru\u0161en\u00ed elektromagnetick\u00fdmi vlnami z jin\u00fdch za\u0159\u00edzen\u00ed v okol\u00ed) a byla zavedena technologie eSCO, kter\u00e1 zlep\u0161uje kvalitu p\u0159enosu zvuku p\u0159i hlasov\u00fdch hovorech. Bohu\u017eel kvalita zvuku z hlediska poslechu hudby byla v t\u00e9 dob\u011b nedostate\u010dn\u00e1 – to je d\u00e1no t\u00edm, \u017ee prvn\u00ed generace Bluetooth byla vyvinuta p\u0159edev\u0161\u00edm pro uskute\u010d\u0148ov\u00e1n\u00ed hlasov\u00fdch hovor\u016f. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bluetooth - druh\u00e1 generace (2005)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nVe druh\u00e9 generaci Bluetooth do\u0161lo k obrovsk\u00e9mu skoku v kvalit\u011b. To bylo mimo jin\u00e9 zp\u016fsobeno po\u017eadavkem trhu se spot\u0159ebn\u00ed elektronikou na zaveden\u00ed Bluetooth jako standardu vybaven\u00ed r\u016fzn\u00fdch za\u0159\u00edzen\u00ed, mezi n\u011b\u017e tehdy pat\u0159ila i bezdr\u00e1tov\u00e1 stereofonn\u00ed sluch\u00e1tka. V\u00fdznamn\u00fdm ukazatelem v\u00fdvoje technologie Bluetooth je zv\u00fd\u0161en\u00ed rychlosti p\u0159enosu dat na 3 Mb\/s a zv\u00fd\u0161en\u00ed dosahu na 30 m. Technologie Bluetooth 2.0 byla tak\u00e9 optimalizov\u00e1na z hlediska \u00faspory energie a syst\u00e9mu p\u00e1rov\u00e1n\u00ed SSP. Kvalita zvuku, a\u010dkoli byla lep\u0161\u00ed ne\u017e u p\u0159edchoz\u00ed generace, st\u00e1le z\u016fst\u00e1vala na pov\u00e1\u017eenou, a to p\u0159edev\u0161\u00edm kv\u016fli hardwarov\u00fdm omezen\u00edm kodeku SBC. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bluetooth - t\u0159et\u00ed generace (2009)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nBluetooth 3.0, zn\u00e1m\u00fd tak\u00e9 jako Bluetooth 3.0+HS, ji\u017e umo\u017e\u0148oval p\u0159ipojen\u00ed Wi-Fi a rychlost p\u0159enosu dat byla zv\u00fd\u0161ena a\u017e na 24 Mb\/s, co\u017e prosp\u011blo kvalit\u011b p\u0159enosu zvukov\u00fdch soubor\u016f a zajistilo dostate\u010dn\u011b kvalitn\u00ed p\u0159enos videosoubor\u016f. V t\u00e9to generaci byla tak\u00e9 zavedena podpora protokolu L2CAP. Bohu\u017eel byla v\u011bnov\u00e1na p\u0159\u00edli\u0161 mal\u00e1 pozornost \u00faspo\u0159e energie – za\u0159\u00edzen\u00ed Bluetooth 3.0+HS vy\u017eadovala velmi rychl\u00e9 nab\u00edjen\u00ed baterie. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bluetooth - \u010dtvrt\u00e1 generace (2010)<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nPouh\u00fd rok po vyd\u00e1n\u00ed t\u0159et\u00ed generace Bluetooth p\u0159i\u0161la jej\u00ed \u010dtvrt\u00e1 iterace, zn\u00e1m\u00e1 jako Bluetooth Smart Ready a Bluetooth Low Energy (BLE). Oproti p\u0159edchoz\u00ed generaci se v\u00fdvoj\u00e1\u0159i p\u0159iklonili k \u0159e\u0161en\u00ed probl\u00e9mu rychl\u00e9ho vyb\u00edjen\u00ed baterie v za\u0159\u00edzen\u00edch. Technologie Bluetooth Smart Ready umo\u017enila roz\u0161\u00ed\u0159it funk\u010dnost p\u0159enosu dat mezi za\u0159\u00edzen\u00edmi, jako jsou notebooky, tablety a chytr\u00e9 telefony, a umo\u017enila nejen p\u0159enos zvuku, ale nap\u0159\u00edklad i \u0159\u00eddic\u00edch zpr\u00e1v pro za\u0159\u00edzen\u00ed internetu v\u011bc\u00ed. D\u00edky nov\u00e9mu kodeku aptX se zlep\u0161ila tak\u00e9 kvalita p\u0159enosu zvuku a fyzick\u00fd dosah se zv\u00fd\u0161il na 60 m. Podpora technologie Bluetooth Smart Ready je v\u0161ak poskytov\u00e1na pouze v p\u0159\u00edpad\u011b, \u017ee ji maj\u00ed implementovanou ob\u011b za\u0159\u00edzen\u00ed Bluetooth. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bluetooth - p\u00e1t\u00e1 generace (2016)\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nSt\u00e1le lep\u0161\u00ed a lep\u0161\u00ed z generace na generaci! P\u00e1t\u00e1 verze Bluetooth spat\u0159ila sv\u011btlo sv\u011bta v roce 2016. Tentokr\u00e1t odd\u011blen\u00ed v\u00fdzkumu a v\u00fdvoje Bluetooth SIG kladlo zvl\u00e1\u0161tn\u00ed d\u016fraz na efektivitu interakce s hardwarov\u00fdmi aplikacemi internetu v\u011bc\u00ed. Zv\u00fd\u0161il se tak\u00e9 dosah v otev\u0159en\u00e9m prostoru – a\u017e na 240 m. V\u00fdvoj\u00e1\u0159i implementovali nov\u00fd kodek LC3, kter\u00fd zaji\u0161\u0165uje, \u017ee p\u0159enos zvukov\u00fdch soubor\u016f s n\u00edzk\u00fdm bitov\u00fdm rozli\u0161en\u00edm nen\u00ed na \u00fakor zhor\u0161en\u00ed v\u00fdsledn\u00e9 kvality zvuku. Ve \u010dtvrt\u00e9 a p\u00e1t\u00e9 generaci byla d\u00edky technologii SAM zlep\u0161ena tak\u00e9 odolnost proti ru\u0161en\u00ed ze s\u00edt\u00ed LTE. Bluetooth 5.0 tak\u00e9 umo\u017e\u0148uje paraleln\u00ed p\u0159ipojen\u00ed ke dv\u011bma zvukov\u00fdm za\u0159\u00edzen\u00edm sou\u010dasn\u011b. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bluetooth - zp\u011btn\u00e1 kompatibilita<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nP\u0159i v\u00fdb\u011bru za\u0159\u00edzen\u00ed podporuj\u00edc\u00edch technologii Bluetooth je vhodn\u00e9 v\u011bnovat pozornost tomu, jakou technologii podporuj\u00ed. Nap\u0159\u00edklad za\u0159\u00edzen\u00ed Bluetooth 5.0 jsou zp\u011btn\u011b kompatibiln\u00ed se za\u0159\u00edzen\u00edmi Bluetooth 4.0. To znamen\u00e1, \u017ee sluch\u00e1tka vybaven\u00e1 p\u0159ipojen\u00edm Bluetooth 4.2 mohou bez probl\u00e9m\u016f fungovat s telefonem podporuj\u00edc\u00edm Bluetooth 5.0. Bohu\u017eel n\u011bkter\u00e1 vylep\u0161en\u00ed, kter\u00e1 byla provedena v Bluetooth 5.0, nebudou fungovat se za\u0159\u00edzen\u00edmi Bluetooth 4.2, nap\u0159\u00edklad funkce Dual Audio, kter\u00e1 byla implementov\u00e1na a\u017e v Bluetooth 5.0. Pokud chcete, aby va\u0161e za\u0159\u00edzen\u00ed byla vz\u00e1jemn\u011b pln\u011b kompatibiln\u00ed, je nejlep\u0161\u00ed vyb\u00edrat modely vybaven\u00e9 stejnou verz\u00ed Bluetooth. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Provozn\u00ed profily komunikace Bluetooth\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\nProfily Bluetooth jsou souborem specifikac\u00ed nebo pravidel, kter\u00e9 definuj\u00ed zp\u016fsob pou\u017e\u00edv\u00e1n\u00ed za\u0159\u00edzen\u00ed. Dne\u0161n\u00ed konstrukce bezdr\u00e1tov\u00fdch sluch\u00e1tek Bluetooth jsou v\u00edce\u00fa\u010delov\u00e9. N\u011bkter\u00e1 z nich uskute\u010d\u0148uj\u00ed a p\u0159ij\u00edmaj\u00ed hovory nebo ovl\u00e1daj\u00ed p\u0159ehr\u00e1v\u00e1n\u00ed hudby. Tyto \u00falohy vy\u017eaduj\u00ed ke spr\u00e1vn\u00e9mu fungov\u00e1n\u00ed specifick\u00e9 profily Bluetooth, mezi nimi\u017e rozli\u0161ujeme: \n<\/p>\n

    \n\n
  • HFP (Hands-Free Profile) – umo\u017e\u0148uje sluch\u00e1tk\u016fm uskute\u010d\u0148ovat hovory a p\u0159istupovat k funkc\u00edm telefonu, jako je opakovan\u00e9 vyt\u00e1\u010den\u00ed, \u010dekaj\u00edc\u00ed hovor a hlasov\u00e9 vyt\u00e1\u010den\u00ed;\n\n
  • HSP (Headset Profile) – umo\u017e\u0148uje u\u017eivateli uskute\u010d\u0148ovat a p\u0159ij\u00edmat hovory, odpojovat a nastavovat hlasitost pomoc\u00ed sluch\u00e1tek;\n\n
  • A2DP (Advanced Audio Distribution Profile) – umo\u017e\u0148uje u\u017eivateli streamovat zvuk z jednoho za\u0159\u00edzen\u00ed do druh\u00e9ho, nap\u0159. ze smartphonu do n\u00e1hlavn\u00ed soupravy, ze smartphonu do autor\u00e1dia nebo z mikrofonu do po\u010d\u00edta\u010de;\n\n
  • AVRCP (profil d\u00e1lkov\u00e9ho ovl\u00e1d\u00e1n\u00ed audia\/videa) – umo\u017e\u0148uje u\u017eivateli pou\u017e\u00edvat sluch\u00e1tka jako d\u00e1lkov\u00fd ovlada\u010d pro p\u0159ehr\u00e1v\u00e1n\u00ed m\u00e9di\u00ed; pomoc\u00ed tohoto profilu m\u016f\u017eete pozastavit, p\u0159ehr\u00e1vat a zastavit p\u0159ehr\u00e1v\u00e1n\u00ed hudby a p\u0159eskakovat skladby;\n\n
  • PBAB (profil p\u0159\u00edstupu k telefonn\u00edmu seznamu) – umo\u017e\u0148uje sluch\u00e1tk\u016fm p\u0159\u00edstup k telefonn\u00edm kontakt\u016fm u\u017eivatele v r\u00e1mci funkce upozorn\u011bn\u00ed na volaj\u00edc\u00edho.\n<\/li>\n<\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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    Bluetooth - v\u00fdkonov\u00e9 t\u0159\u00eddy<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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    \nV\u00fdkonov\u00e9 t\u0159\u00eddy Bluetooth ud\u00e1vaj\u00ed v\u00fdstupn\u00ed v\u00fdkon a bezdr\u00e1tov\u00fd dosah za\u0159\u00edzen\u00ed Bluetooth. \u010c\u00edm vy\u0161\u0161\u00ed je v\u00fdstupn\u00ed v\u00fdkon, t\u00edm vy\u0161\u0161\u00ed je dosah. Mezi za\u0159\u00edzen\u00ed Bluetooth t\u0159\u00eddy 1 a 2 obvykle pat\u0159\u00ed notebooky a stoln\u00ed po\u010d\u00edta\u010de, zat\u00edmco ostatn\u00ed men\u0161\u00ed mobiln\u00ed za\u0159\u00edzen\u00ed spadaj\u00ed do t\u0159\u00eddy 3. Rozd\u011blen\u00ed podle v\u00fdkonov\u00e9 t\u0159\u00eddy a dosahu Bluetooth je n\u00e1sleduj\u00edc\u00ed: \n<\/p>\n

      \n\n
    • T\u0159\u00edda 1 – Maxim\u00e1ln\u00ed v\u00fdkon: 100 mW (20 dBm), maxim\u00e1ln\u00ed dosah: 100 m;\n\n
    • T\u0159\u00edda 2 – maxim\u00e1ln\u00ed v\u00fdkon: 2,5 mW (4 dBm), maxim\u00e1ln\u00ed dosah: 10 m;\n\n
    • T\u0159\u00edda 3 – maxim\u00e1ln\u00ed v\u00fdkon: 1 mW (0 dBm), maxim\u00e1ln\u00ed dosah: 1 m.\n<\/li>\n<\/ul>\n

      \nPokud tedy chcete p\u0159i poslechu hudby pln\u011b vyu\u017e\u00edt dosah 100 m, pak mus\u00ed b\u00fdt p\u0159ehr\u00e1va\u010d MP3 i sluch\u00e1tka za\u0159\u00edzen\u00edmi t\u0159\u00eddy 1. Pokud je naopak p\u0159ehr\u00e1va\u010d MP3 t\u0159\u00eddy 1 a sluch\u00e1tka t\u0159\u00eddy 2, pak bude maxim\u00e1ln\u00ed dosah p\u0159ipojen\u00ed pod \u0161ir\u00fdm nebem 10 m, a to z d\u016fvodu ni\u017e\u0161\u00ed v\u00fdkonov\u00e9 t\u0159\u00eddy jednoho z obou za\u0159\u00edzen\u00ed – v tomto p\u0159\u00edpad\u011b sluch\u00e1tek. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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      Bluetooth - princip fungov\u00e1n\u00ed\n<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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      \nBluetooth funguje tak, \u017ee r\u00e1diov\u00fd modul pomoc\u00ed p\u0159eskakov\u00e1n\u00ed frekvenc\u00ed s rozprost\u0159en\u00edm spektra p\u0159en\u00e1\u0161\u00ed data mezi des\u00edtkami kan\u00e1l\u016f pracuj\u00edc\u00edch v p\u00e1smu VHF. Tento zp\u016fsob komunikace sni\u017euje probl\u00e9my s ru\u0161en\u00edm a zvy\u0161uje jistotu spr\u00e1vn\u00e9ho p\u0159enosu sign\u00e1lu Bluetooth. V z\u00e1vislosti na pou\u017eit\u00e9m standardu Bluetooth se mohou jednotliv\u00e1 za\u0159\u00edzen\u00ed li\u0161it ve zp\u016fsobu komunikace – kv\u016fli pou\u017eit\u00fdm kodek\u016fm a jejich p\u0159\u00edslu\u0161n\u00e9mu k\u00f3dovac\u00edmu algoritmu. K\u00f3dov\u00e1n\u00ed Bluetooth zahrnuje p\u0159enos dat ve form\u011b paket\u016f. Jednotliv\u00e9 kodeky se li\u0161\u00ed parametry, jako je spot\u0159eba energie, datov\u00e1 propustnost, kvalita zvuku a maxim\u00e1ln\u00ed garantovan\u00fd stabiln\u00ed dosah spojen\u00ed. Jedin\u00fdm kodekem, kter\u00fd mus\u00ed b\u00fdt pou\u017eit ve v\u0161ech za\u0159\u00edzen\u00edch Bluetooth, je SBC neboli k\u00f3dov\u00e1n\u00ed d\u00edl\u010d\u00edch p\u00e1sem. V\u0161echny ostatn\u00ed mo\u017enosti, a\u0165 u\u017e jsou zam\u011b\u0159eny na zvuk s vysok\u00fdm rozli\u0161en\u00edm nebo na co nejkrat\u0161\u00ed dobu odezvy na pohyb tla\u010d\u00edtka nebo joysticku na hern\u00ed konzoli, jsou integrov\u00e1ny podle uv\u00e1\u017een\u00ed v\u00fdrobce konkr\u00e9tn\u00edho hardwaru. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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      P\u00e1rov\u00e1n\u00ed za\u0159\u00edzen\u00ed - jak pou\u017e\u00edvat Bluetooth?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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      Za\u0159\u00edzen\u00ed Bluetooth mus\u00ed b\u00fdt navz\u00e1jem sp\u00e1rov\u00e1na.<\/figcaption>\n\t\t\t\t\t\t\t\t\t\t<\/figure>\n\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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      \nVe v\u011bt\u0161in\u011b p\u0159\u00edpad\u016f, kdy chcete sp\u00e1rovat nap\u0159\u00edklad chytr\u00fd telefon nebo tablet se za\u0159\u00edzen\u00edm Bluetooth, jako jsou reproduktory, se tento proces prov\u00e1d\u00ed ru\u010dn\u011b – v nastaven\u00ed mobiln\u00edho za\u0159\u00edzen\u00ed je t\u0159eba zapnout Bluetooth. T\u00edm se smartphone stane viditeln\u00fdm pro ostatn\u00ed za\u0159\u00edzen\u00ed Bluetooth. Nyn\u00ed sta\u010d\u00ed vybrat za\u0159\u00edzen\u00ed, kter\u00e9 v\u00e1s zaj\u00edm\u00e1, a sp\u00e1rovat je s telefonem. P\u0159i p\u0159ep\u00edn\u00e1n\u00ed na reproduktory Bluetooth se obvykle automaticky vypne vestav\u011bn\u00fd reproduktor telefonu. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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      Bluetooth a Wi-Fi - rozd\u00edly<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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      \nP\u0159esto\u017ee Bluetooth i Wi-Fi vyu\u017e\u00edvaj\u00ed k bezdr\u00e1tov\u00e9 komunikaci r\u00e1diov\u00e9 vlny, tyto technologie se velmi li\u0161\u00ed. U Wi-Fi je obvykle k dispozici v\u00fdkonn\u00fd hotspot, p\u0159es kter\u00fd se mohou p\u0159ipojovat extern\u00ed za\u0159\u00edzen\u00ed a p\u0159en\u00e1\u0161et mezi sebou velk\u00e9 mno\u017estv\u00ed dat. Krom\u011b toho p\u0159ipojen\u00ed Wi-Fi poskytuje vy\u0161\u0161\u00ed datovou propustnost, je bezpe\u010dn\u011bj\u0161\u00ed, m\u00e1 v\u011bt\u0161\u00ed fyzick\u00fd dosah a m\u016f\u017ee podporovat v\u00edce u\u017eivatel\u016f sou\u010dasn\u011b. P\u0159ipojen\u00ed Bluetooth naproti tomu vykazuje ni\u017e\u0161\u00ed spot\u0159ebu energie – \u0159\u00e1dov\u011b ve zlomc\u00edch wattu. Jsou pomalej\u0161\u00ed a pou\u017e\u00edvaj\u00ed se sp\u00ed\u0161e pro rychl\u00e9, jednoduch\u00e9 a p\u0159\u00edm\u00e9 p\u00e1rov\u00e1n\u00ed za\u0159\u00edzen\u00ed ne\u017e pro aplikace s pevn\u00fdm um\u00edst\u011bn\u00edm. \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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      Jak\u00e1 za\u0159\u00edzen\u00ed pou\u017e\u00edvaj\u00ed Bluetooth?<\/h2>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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      \nBluetooth je dnes technologie, kterou lze nal\u00e9zt t\u00e9m\u011b\u0159 ve v\u0161ech typech za\u0159\u00edzen\u00ed spot\u0159ebn\u00ed elektroniky, ale nejen v nich. Bluetooth najdeme v chytr\u00fdch telefonech, tabletech, po\u010d\u00edta\u010d\u00edch, kl\u00e1vesnic\u00edch, my\u0161\u00edch, sluch\u00e1tk\u00e1ch, gamepadech, tisk\u00e1rn\u00e1ch, diagnostick\u00fdch rozhran\u00edch OBD pro automobily a dokonce i v elektrick\u00fdch zubn\u00edch kart\u00e1\u010dc\u00edch – legenda o starosv\u011btsk\u00e9m kr\u00e1li \u017eije d\u00e1l! \n<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

      Ne\u017e sp\u00e1rujeme chytr\u00fd telefon s nov\u00fdmi sluch\u00e1tky… Stoj\u00ed za to se sezn\u00e1mit s jejich v\u00fdbavou!<\/p>\n","protected":false},"author":22,"featured_media":63122,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[549,557],"tags":[],"class_list":["post-96148","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kompendium-cs","category-zajimavosti"],"acf":[],"yoast_head":"\nJak funguje Bluetooth - dosah, rozd\u00edly - Botland<\/title>\n<meta name=\"description\" content=\"Nav\u0161tivte Botland blog, kde najdete podrobnosti o jednom z nejobl\u00edben\u011bj\u0161\u00edch bezdr\u00e1tov\u00fdch standard\u016f, Bluetooth!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/botland.cz\/blog\/jak-funguje-bluetooth-dosah-rozdily\/\" \/>\n<meta property=\"og:locale\" content=\"cs_CZ\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Jak funguje Bluetooth - 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