Noiseless 'kala' ikusonyeza: mmene onse anayamba?

Si chinsinsi n'chakuti kulanda zambiri za uthenga uliwonse akhoza molakwika, mwachitsanzo chimene anatumiza zikhoza kuwerenga olakwika. Chithunzi cholakwika angayambe mchikakamizo cha khamu yotakata zinthu, koma ambiri ndi zotsatirazi:

- pakutchulidwa wa kutumiza, chipangizo kulandira kapena mavuto chopatsilira ndi hardware kapena mapulogalamu gawo;

- pamaso pa phokoso mu kulumikiza kulankhulana njira, omwe mwina chifukwa kaya kulephera chifukwa kuwonongeka, ndipo ndi mavuto chifukwa kukhalapo ndi chikoka Link (akulimbana kapena mwachisawawa).

Pofuna umphumphu wa uthenga deta kufala pa njira zosiyanasiyana kulankhulana, ndi umisiri zosiyanasiyana ntchito lero, koma ambiri, otchuka, losavuta ndi yabwino njira kuonetsetsa chitetezo deta wokhudza 'kala' ikusonyeza noiseless.

History limatchinjiriza zambiri pa kufala inayamba mu 1948, pamene inasindikizidwa wotchuka ntchito Shannon a "masamu Chiphunzitsochi Kulankhulana." Ndi nkhaniyi ndi mfundo yofunika kwambiri mapangidwe chinthu choterocho monga 'kala' ikusonyeza noiseless, kutanthauza 'kala' ikusonyeza kuti amapereka ulamuliro chifukwa cha mphulupulu ndipo ngati n'koyenera, awathandize.

Ku nkhani ndi Shannon motere mapeto zidzasintha: kuchita ntchito yomanga ngalande kulankhulana kuchepetsa mapangidwe uthenga zolakwa, n'zovuta ndi chuma unfeasible. Savutika ndi mtengo kugwiritsa ntchito njira zosiyanasiyana kabisidwe zambiri. Pa nthawi yomweyo Shannon kodi sizikusonyeza zizindikiro zapadera, ndi kwangotsimikizira moyo wawo.

Mitundu ya wolemba pulogalamu zambiri akhala kwambiri anaphunzira makumi asanu Mu zaka zapitazo, koma zotsatira sanam'bweretsere mphamvu iliyonse othandiza. Zaka khumi zotsatira zinali zodzaza ndi kupeza kwa njira kuti adzalola kuti alenge osiyanasiyana matekinoloje kuchepetsa mosavuta mapangidwe uthenga kufala zolakwa.

Kagwiridwe woyamba amatchedwa zizindikiro chipika, ndipo makamaka masamu mu chirengedwe. Noiseless 'kala' ikusonyeza kwa nthawi yoyamba mu mawonekedwe kumene kunachitika 1950s, pamene chipika zizindikiro angathe kukonza kulakwitsa kumodzi kokha. Kumene, zizindikiro izi ndi osamveka, koma chifukwa kwa nthawi yaitali zosiyanasiyana kafukufuku. Zotsatira ndi gulu lonse la zizindikiro younikira ndi lolondola zolakwa angapo.

luso lina uliri zolakwa kulamulira 'kala' ikusonyeza, - amayesayesa kumvetsetsa kabisidwe ndi decoding, maonekedwe ndi zolakwa mawu a chiphunzitso cha Mwina. Chifukwa, maphunziro yaitali kalasi malamulo Nonblock wakhala analenga, imene ambiri ankagwiritsa ntchito zizindikiro convolutional.

Mu makumi asanu ndi awiri a atumwi wotsiriza, njira awiriwa akhala m'nkhani mtsempha yomweyo, ndi chifukwa kuti potsiriza anakwanitsa ndendende zizindikiro zimenezo zimene zinachititsa kuti m'nkhani yake, Shannon. Chifukwa cha kuchuluka kwa ntchito m'madera awiri amene anapanga zizindikiro banja akhala akufuna ndipo anapereka kofunikira kwambiri kuonetsetsa uthenga kukhulupirika pa kufala ake kupyolera mu njira zolankhulirana.

Chinali mbiri ya mapangidwe zolakwa kukonza 'kala' ikusonyeza. Lero akufuna zosiyanasiyana madera ndiponso mfundo zokhudza kusamala kufala mudziwe amene ali functionals osiyana, redundancy, kudalirika kwa dongosolo, dzuwa ndi magawo ena ofunika.