peredacha informatsii

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powerpoint presentation peredacha informatsii nargiza mamatova 01 protsessi kodirovaniya i dekodirovaniya 02 pomexi i shum pri peredache 03 informatsionnie kanali i media plan: metodi sjatiya dannix metodi sjatiya dannix, kak rle, effektivni dlya izobrajeniy s bolshimi odnorodnimi oblastyami; arifmeticheskoe kodirovanie dostigaet visokoy kompressii; sjatie s poteryami (mpeg, mp3) umenshaet razmer faylov, podxodit dlya striminga. obrabotka rechi i zvuka peredacha informatsii po audiokanalam ispolzuet modulyatsiyu (am, fm, ofdm) v veshanii i sotovoy svyazi (5g >1 gbit/s). kodirovanie (turbokodi, ldpc) povishaet pomexoustoychivost (oshibki 1 mbit/s). obrabotka rechevogo signala (lpc, spektralnoe vichitanie, filtr vinera) povishaet razborchivost rechi, uluchshaya otnoshenie signal/shum na 15-20 db v raznix usloviyax (shumnie pomesheniya, konferents-svyaz) zashita informatsii pri peredache zashishyonnaya peredacha dannix po protokolu tls 1.3 mejdu serverami aws v londone i frankfurte s ispolzovaniem 256-bitnogo aes shifrovaniya i 4096-bitnogo rsa obmena klyuchami dlya konfidentsialnoy finansovoy informatsii. peredacha dannix cherez vpn (openvpn) s 2048-bitnim obmenom klyuchami diffi-xellmana mejdu ustroystvami …

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arnie sputniki). naprimer, data-tsentri kremnievoy dolini polagayutsya na visokoskorostnie seti dlya effektivnogo obmena dannimi mejdu serverami. perenos biologicheskoy informatsii perenos informatsii v ekosistemax osushestvlyaetsya razlichnimi mexanizmami: krugovorot pitatelnix veshestv, potok energii i signalnoe povedenie. propusknaya sposobnost kanala i teoriya kodirovaniya teoriya kodirovaniya, kodi xemminga (7,4), kodi rida-solomona, svertochnie kodi, turbo-kodi, nizkoplotnostnie kodi proverki na chetnost (ldpc), obnarujenie i korrektsiya oshibok, dekodirovanie minimalnogo rasstoyaniya, granitsa gilberta-varshamova, energeticheskiy viigrish kodirovaniya (db), peredacha dannix (naprimer, cherez atlanticheskiy okean). propusknaya sposobnost kanala, teorema shennona (1948), bit/s, ogranicheniya polosi propuskaniya (gts), shum (otnoshenie signal/shum), kodi korrektsii oshibok, teorema kotelnikova-shennona, sjatie dannix, istochnik informatsii (naprimer, peredatchik v londone). sjatie izobrajeniy i video jpeg, mpeg-4, h.264/avc — kodeki so sjatiem s poteryami dlya izobrajeniy i video; umenshayut razmer faylov (naprimer, s 10 mb do 1 mb) s pomoshyu takix metodov, kak diskretnoe kosinusnoe preobrazovanie (dct) i otsenka dvijeniya, vliyaya na kachestvo peredacha tsifrovix izobrajeniy zavisit ot formatov …

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i kogerentnoe detektirovanie; kodi korrektsii oshibok (naprimer, rida-solomona) vajni dlya tochnogo vosstanovleniya dannix na zashumlyonnix kanalax; otnoshenie signal/shum (ossh) sushestvenno vliyaet na proizvoditelnost demodulyatsii. osnovi teorii informatsii teoriya informatsii izmeryaet entropiyu shennona (h) v bitax, otsenivaya umenshenie neopredelyonnosti cherez teoremi kodirovaniya istochnika, vliyaya na algoritmi sjatiya dannix, takie kak kodirovanie xaffmana, v kanalax s ogranichennoy propusknoy sposobnostyu (naprimer, wi-fi 2,4 ggts) osnovi obrabotki signalov effektivnost peredachi informatsii zavisit ot propusknoy sposobnosti kanala (teorema shennona-xartli), urovnya shumov (snr, ber) i ispolzuemix kodov (xemminga, rida-solomona) dlya korrektsii oshibok. prakticheskoe primenenie – ot sotovoy svyazi (gsm, lte) do sputnikovoy (gps, goes), otrajaya raznoobrazie sred i protokolov osnovi obrabotki signalov vklyuchayut preobrazovaniya fure (bpf), filtratsiyu (kix, bix) i veyvlet-analiz, vajnie dlya obrabotki signalov v audio (22,05 kgts), izobrajenii (prostranstvennie chastoti) i biomeditsine (ekg, eeg) setevie protokoli i standarti 01 02 sales 1st qtr 2nd qtr 100 0 sales 1st qtr 2nd qtr 100 0 …

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powerpoint presentation peredacha informatsii nargiza mamatova 01 protsessi kodirovaniya i dekodirovaniya 02 pomexi i shum pri peredache 03 informatsionnie kanali i media plan: metodi sjatiya dannix metodi sjatiya dannix, kak rle, effektivni dlya izobrajeniy s bolshimi odnorodnimi oblastyami; arifmeticheskoe kodirovanie dostigaet visokoy kompressii; sjatie s poteryami (mpeg, mp3) umenshaet razmer faylov, podxodit dlya striminga. obrabotka rechi i zvuka peredacha informatsii po audiokanalam ispolzuet modulyatsiyu (am, fm, ofdm) v veshanii i sotovoy svyazi (5g >1 gbit/s). kodirovanie (turbokodi, ldpc) povishaet pomexoustoychivost (oshibki 1 mbit/s). obrabotka rechevogo signala (lpc, spektralnoe vichitanie, filtr vinera) povishaet razborchivost rechi, uluchshaya otnoshenie signal/shum na 15-2...

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