{"id":8300,"date":"2023-08-25T00:00:00","date_gmt":"2023-08-25T00:00:00","guid":{"rendered":"https:\/\/tech-lib.eu\/tech\/porozumeni-latenci-jak-velka-je-povazovana-za-spatnou\/"},"modified":"2023-08-25T00:00:00","modified_gmt":"2023-08-25T00:00:00","slug":"porozumeni-latenci-jak-velka-je-povazovana-za-spatnou","status":"publish","type":"post","link":"https:\/\/tech-lib.eu\/tech\/porozumeni-latenci-jak-velka-je-povazovana-za-spatnou\/","title":{"rendered":"Porozum\u011bn\u00ed latenci. Jak velk\u00e1 je pova\u017eov\u00e1na za \u0161patnou?"},"content":{"rendered":"
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<\/div>\n

Ka\u017ed\u00e1 digit\u00e1ln\u00ed komunikace nebo s\u00ed\u0165ov\u00e9 spojen\u00ed mus\u00ed br\u00e1t v \u00favahu latenci. Doba, kter\u00e1 uplyne mezi odesl\u00e1n\u00edm dat z jednoho m\u00edsta do druh\u00e9ho a jejich p\u0159ijet\u00edm, se ozna\u010duje jako zpo\u017ed\u011bn\u00ed. A\u0165 u\u017e hrajete videohry, streamujete videa nebo se \u00fa\u010dastn\u00edte videokonferenc\u00ed, latence m\u016f\u017ee m\u00edt velk\u00fd vliv na to, jak v\u0161e prob\u00edh\u00e1. V tomto p\u0159\u00edsp\u011bvku se budeme zab\u00fdvat t\u00e9matem latence, \u0159ekneme si, jak moc je \u0161kodliv\u00e1, a odpov\u00edme na n\u011bkter\u00e9 \u010dasto kladen\u00e9 ot\u00e1zky t\u00fdkaj\u00edc\u00ed se t\u00e9to problematiky. Je latence 1000 dobr\u00e9 \u010d\u00edslo? <\/p>\n

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V aplikac\u00edch re\u00e1ln\u00e9ho \u010dasu se latence 1000 milisekund (ms) obvykle pova\u017euje za pom\u011brn\u011b vysokou a m\u00e1 potenci\u00e1l v\u00e9st k pozorovateln\u00fdm zpo\u017ed\u011bn\u00edm. Zejm\u00e9na p\u0159i \u010dinnostech s rychlou odezvou, jako je hran\u00ed online her nebo videokonference v re\u00e1ln\u00e9m \u010dase, m\u016f\u017ee toto zpo\u017ed\u011bn\u00ed znep\u0159\u00edjemnit pr\u00e1ci. Z\u00e1kladn\u00ed prohl\u00ed\u017een\u00ed webu nebo streamov\u00e1n\u00ed lze sice zvl\u00e1dnout i s latenc\u00ed 1000 ms, ale nen\u00ed to optim\u00e1ln\u00ed. Pro bezprobl\u00e9movou a rychlou odezvu interakc\u00ed se doporu\u010duje krat\u0161\u00ed latence. Je 30 ms latence p\u0159ijateln\u00e1? <\/p>\n

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V\u011bt\u0161ina aplikac\u00ed pova\u017euje latenci 30 ms za docela dobrou. Ve skute\u010dnosti je pova\u017eov\u00e1na za skv\u011blou latenci pro \u010dinnosti v re\u00e1ln\u00e9m \u010dase, jako je streamov\u00e1n\u00ed videa a hran\u00ed online her. S latenc\u00ed 30 ms m\u016f\u017eete o\u010dek\u00e1vat jen m\u00e1lo zpo\u017ed\u011bn\u00ed a bezchybn\u00fd z\u00e1\u017eitek. Je v\u0161ak d\u016fle\u017eit\u00e9 m\u00edt na pam\u011bti, \u017ee n\u011bkte\u0159\u00ed profesion\u00e1ln\u00ed nebo konkuren\u010dn\u00ed u\u017eivatel\u00e9 mohou usilovat o je\u0161t\u011b ni\u017e\u0161\u00ed latence a sna\u017eit se o 20 ms nebo ni\u017e\u0161\u00ed, aby z\u00edskali malou v\u00fdhodu. Pro v\u011bt\u0161inu spot\u0159ebitel\u016f je v\u0161ak zpo\u017ed\u011bn\u00ed 30 ms zcela p\u0159ijateln\u00e9. <\/p>\n

Jak \u0161patn\u00e1 je latence 250? <\/div>\n

Zejm\u00e9na u \u00faloh, kter\u00e9 vy\u017eaduj\u00ed rychl\u00e9 reakce, lze latenci 250 ms pova\u017eovat za vysokou. N\u011bkter\u00e9 operace, jako je sledov\u00e1n\u00ed videa nebo p\u0159\u00edstup na web, m\u016f\u017eete b\u00fdt st\u00e1le schopni dokon\u010dit, i kdy\u017e m\u016f\u017ee doch\u00e1zet k pozorovateln\u00fdm prodlev\u00e1m. Nap\u0159\u00edklad p\u0159i hran\u00ed online her m\u016f\u017ee m\u00edt latence 250 ms za n\u00e1sledek trhav\u00e9 hran\u00ed a znev\u00fdhodnit v\u00e1s p\u0159i h\u0159e v\u00edce hr\u00e1\u010d\u016f. Podobn\u00e9 probl\u00e9my se synchronizac\u00ed zvuku a videa mohou nastat p\u0159i videokonferenc\u00edch nebo hovorech. Sn\u00ed\u017een\u00ed latence se doporu\u010duje, kdykoli je to mo\u017en\u00e9, aby se zv\u00fd\u0161il u\u017eivatelsk\u00fd komfort. Jak mohu sn\u00ed\u017eit latenci? <\/p>\n

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Sn\u00ed\u017een\u00edm latence lze v\u00fdrazn\u011b zlep\u0161it v\u00e1\u0161 digit\u00e1ln\u00ed z\u00e1\u017eitek. Ke sn\u00ed\u017een\u00ed latence m\u016f\u017eete podniknout n\u00e1sleduj\u00edc\u00ed kroky: Pou\u017eijte kabelov\u00e9 p\u0159ipojen\u00ed: Pokud v sou\u010dasn\u00e9 dob\u011b pou\u017e\u00edv\u00e1te bezdr\u00e1tov\u00e9 p\u0159ipojen\u00ed, p\u0159echod na kabelov\u00e9 p\u0159ipojen\u00ed m\u016f\u017ee v\u00fdrazn\u011b sn\u00ed\u017eit latenci. Ve srovn\u00e1n\u00ed s Wi-Fi nab\u00edzej\u00ed ethernetov\u00e9 kabely bezpe\u010dn\u011bj\u0161\u00ed a spolehliv\u011bj\u0161\u00ed p\u0159ipojen\u00ed. Optimalizujte nastaven\u00ed s\u00edt\u011b: <\/p>\n

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2. Ujist\u011bte se, \u017ee je va\u0161e s\u00ed\u0165 nastavena na n\u00edzkou latenci. To zahrnuje konfiguraci nastaven\u00ed kvality slu\u017eby (QoS) na sm\u011brova\u010di, kter\u00e9 d\u00e1v\u00e1 ur\u010dit\u00e9mu s\u00ed\u0165ov\u00e9mu provozu – nap\u0159\u00edklad p\u0159i hran\u00ed her nebo streamov\u00e1n\u00ed videa – p\u0159ednost. Zav\u0159ete procesy na pozad\u00ed: Odstran\u011bn\u00ed nepot\u0159ebn\u00fdch proces\u016f a program\u016f na pozad\u00ed uvoln\u00ed syst\u00e9mov\u00e9 prost\u0159edky a sn\u00ed\u017e\u00ed latenci. 4. Upgradujte sv\u00e9 internetov\u00e9 p\u0159ipojen\u00ed: Pokud se \u010dasto setk\u00e1v\u00e1te se zna\u010dn\u00fdm zpo\u017ed\u011bn\u00edm, zva\u017ete p\u0159echod na rychlej\u0161\u00ed internetov\u00fd bal\u00ed\u010dek. Chcete-li prozkoumat alternativy, obra\u0165te se na sv\u00e9ho poskytovatele internetov\u00fdch slu\u017eeb (ISP). <\/p>\n

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5. Pe\u010dliv\u011b vyb\u00edrejte servery: P\u0159i \u00fa\u010dasti na online aktivit\u00e1ch si vyb\u00edrejte servery nebo m\u00edsta, kter\u00e1 jsou bl\u00ed\u017ee va\u0161\u00ed poloze. Sn\u00ed\u017een\u00edm vzd\u00e1lenosti, kterou mus\u00ed data urazit, m\u016f\u017eete p\u0159isp\u011bt ke sn\u00ed\u017een\u00ed latence. <\/p>\n

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Z\u00e1v\u011brem lze \u0159\u00edci, \u017ee vy\u0161\u0161\u00ed latence obvykle vedou k m\u00e9n\u011b ide\u00e1ln\u00edm z\u00e1\u017eitk\u016fm, i kdy\u017e p\u0159esn\u00e1 hranice „\u0161patn\u00e9“ latence se m\u016f\u017ee li\u0161it v z\u00e1vislosti na povaze aktivity. Zat\u00edmco 30 ms je pova\u017eov\u00e1no za dobrou latenci, 1000 ms je pova\u017eov\u00e1no za vysokou. Zpo\u017ed\u011bn\u00ed, kter\u00e1 jsou znateln\u00e1, mohou zp\u016fsobit latence vy\u0161\u0161\u00ed ne\u017e 250 ms. Pou\u017eit\u00edm v\u00fd\u0161e uveden\u00fdch opat\u0159en\u00ed ke sn\u00ed\u017een\u00ed latence m\u016f\u017eete zlep\u0161it sv\u016fj online z\u00e1\u017eitek a vyu\u017e\u00edt v\u00fdhod interakc\u00ed, kter\u00e9 jsou rychlej\u0161\u00ed a plynulej\u0161\u00ed.<\/p><\/div>\n

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FAQ<\/div>\n
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Jak velk\u00e1 latence po\u010d\u00edta\u010de je dobr\u00e1?<\/div>\n

V z\u00e1vislosti na konkr\u00e9tn\u00edm p\u0159\u00edpadu pou\u017eit\u00ed lze za p\u0159ijatelnou pova\u017eovat r\u016fznou m\u00edru latence po\u010d\u00edta\u010de. Ni\u017e\u0161\u00ed latence je \u010dasto up\u0159ednost\u0148ov\u00e1na, proto\u017ee znamen\u00e1 rychlej\u0161\u00ed odezvu mezi po\u010d\u00edta\u010dem a u\u017eivatelem. P\u0159ijateln\u00e1 latence pro v\u011bt\u0161inu aplikac\u00ed se pohybuje mezi 1 a 10 milisekundami (ms), co\u017e by m\u011blo v\u00e9st k rychl\u00e9 a plynul\u00e9 odezv\u011b u\u017eivatele. Je\u0161t\u011b ni\u017e\u0161\u00ed latence, zejm\u00e9na pod 1 ms, je vy\u017eadov\u00e1na u aplikac\u00ed pracuj\u00edc\u00edch v re\u00e1ln\u00e9m \u010dase, jako jsou hry nebo \u017eiv\u00fd p\u0159enos zvuku\/videa. Je d\u016fle\u017eit\u00e9 si uv\u011bdomit, \u017ee r\u016fzn\u00e9 \u010dinnosti mohou m\u00edt r\u016fzn\u00e9 po\u017eadavky, proto se to, co p\u0159edstavuje vhodnou latenci, m\u016f\u017ee m\u011bnit v z\u00e1vislosti na po\u017eadavc\u00edch u\u017eivatele. <\/p>\n<\/div>\n

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Je latence 500 p\u0159i spu\u0161t\u011bn\u00e9 h\u0159e dobr\u00e1?<\/div>\n

B\u011bhem hran\u00ed hry by latence 500 byla obvykle pova\u017eov\u00e1na za pom\u011brn\u011b vysokou a mohla by m\u00edt nep\u0159\u00edzniv\u00fd vliv na hern\u00ed z\u00e1\u017eitek. V z\u00e1jmu rychlej\u0161\u00ed odezvy a plynulej\u0161\u00edho hran\u00ed se ve hr\u00e1ch up\u0159ednost\u0148uje ni\u017e\u0161\u00ed latence. U online her je ide\u00e1ln\u00ed latence 500 milisekund nebo m\u00e9n\u011b. Je d\u016fle\u017eit\u00e9 m\u00edt na pam\u011bti, \u017ee vn\u00edman\u00fd efekt latence se m\u016f\u017ee li\u0161it v z\u00e1vislosti na hran\u00e9 h\u0159e a individu\u00e1ln\u00ed toleranci hr\u00e1\u010de. <\/p>\n<\/div>\n

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Je latence 500 ms \u0161patn\u00e1?<\/div>\n

V mnoha situac\u00edch je latence 500 ms (milisekund) vn\u00edm\u00e1na jako relativn\u011b vysok\u00e1 a pomal\u00e1. Term\u00edn „latence“ ozna\u010duje \u010dasov\u00fd interval mezi iniciac\u00ed podn\u011btu nebo po\u017eadavku a obdr\u017een\u00edm odpov\u00eddaj\u00edc\u00ed reakce nebo v\u00fdsledku. A\u010dkoli typ aplikace nebo prost\u0159ed\u00ed m\u016f\u017ee ur\u010dovat, jak\u00e1 latence je p\u0159ijateln\u00e1, interakce, kter\u00e9 jsou rychlej\u0161\u00ed a pohotov\u011bj\u0161\u00ed, \u010dasto t\u011b\u017e\u00ed ze sn\u00ed\u017een\u00ed latence. Za ur\u010dit\u00fdch okolnost\u00ed, nap\u0159\u00edklad p\u0159i hran\u00ed online her nebo videokonferenc\u00edch v re\u00e1ln\u00e9m \u010dase, se m\u016f\u017ee projevit latence 500 ms, kter\u00e1 m\u016f\u017ee m\u00edt nep\u0159\u00edzniv\u00fd vliv na u\u017eivatelsk\u00fd z\u00e1\u017eitek. U n\u011bkter\u00fdch aplikac\u00ed nebo operac\u00ed, kter\u00e9 neprob\u00edhaj\u00ed v re\u00e1ln\u00e9m \u010dase, jako je e-mail nebo prohl\u00ed\u017een\u00ed webov\u00fdch str\u00e1nek, v\u0161ak latence 500 ms nemus\u00ed b\u00fdt pova\u017eov\u00e1na za z\u00e1sadn\u00ed probl\u00e9m.<\/p>\n<\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Ka\u017ed\u00e1 digit\u00e1ln\u00ed komunikace nebo s\u00ed\u0165ov\u00e9 spojen\u00ed mus\u00ed br\u00e1t v \u00favahu latenci. Doba, kter\u00e1 uplyne mezi odesl\u00e1n\u00edm dat z jednoho m\u00edsta do druh\u00e9ho a jejich p\u0159ijet\u00edm, se ozna\u010duje jako zpo\u017ed\u011bn\u00ed. A\u0165 u\u017e hrajete videohry, streamujete videa nebo se \u00fa\u010dastn\u00edte videokonferenc\u00ed, latence m\u016f\u017ee m\u00edt velk\u00fd vliv na to, jak v\u0161e prob\u00edh\u00e1. V tomto p\u0159\u00edsp\u011bvku se budeme zab\u00fdvat … \u010c\u00edst d\u00e1l<\/a><\/p>\n","protected":false},"author":304,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3218],"tags":[],"class_list":["post-8300","post","type-post","status-publish","format-standard","hentry","category-latence"],"_links":{"self":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/posts\/8300","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/users\/304"}],"replies":[{"embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/comments?post=8300"}],"version-history":[{"count":0,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/posts\/8300\/revisions"}],"wp:attachment":[{"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/media?parent=8300"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/categories?post=8300"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tech-lib.eu\/tech\/wp-json\/wp\/v2\/tags?post=8300"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}