Waehere Noiseless: pehea ka anga te reira katoa?

Ko kahore ngaro ko te meka e taea te hē te whakawhiti o ngā mōhiohio o tetahi karere, arā i roto i te mea kua tonoa kia meinga pānuitanga hape. Ka taea e hē puta i raro i te mana o te ngohi whanui o āhuatanga, engari ko te noa tino te whai ake:

- te takanga o te unga, te pūrere te fariiraa i te raruraru tuku ki pūmārō pūmanawa wahi ranei ranei;

- te aroaro o ngangau i roto i te honotanga hongere kōrero, e ai kia tika rānei ki te kore e tika ki te kino, a ka ki te raruraru e tika ana ki te aroaro o awenga waho (ngā ranei tupurangi).

I roto i te tikanga ki te whakarite i te tapatahi o te tuku karere raraunga i runga i ngā hongere kōrero, te ngā hangarau e whakamahia ana i tenei ra, engari te tikanga tino noa, rongonui, ohie, me te watea o te whakarite tiaki raraunga ki te waehere noiseless.

timata ngā mōhiohio History tiaki i roto i te tuku i roto i 1948, i te mea kua whakaputaina te reira i te mahi rongonui o a Shannon "Mathematical Theory o Communication." Ko tenei tuhinga he he parau tumu faufaa mo te hanganga o te taua mea rite te waehere noiseless, e pā ana ki te waehere e whakarato ana mana mo hapa, me te, ki te tika, fakatonutonu ratou.

Mai i te tuhinga e Shannon whai he mutunga auheke: ki te whai wāhi i roto i te hanga o te takere kōrero e whakaiti i te hanganga o te hapa karere, he uaua, me te ōhanga e whaihua. Ko reira nui māmā me te iti ki te tono i ngā tikanga o whakawaehere mōhiohio. I te wa ano kihai i Shannon tohu i tetahi tikanga motuhake, a whakamatauria ratou oraraa anake.

Ngā momo o Tapa kōrero kua ngā ako i roto i te rima tekau o te rau tau whakamutunga, engari kihai i nga hua kawea tetahi pānga mahi. I tohua te tekau tau i muri i te kitenga o te tikanga e pai tukua ki te waihanga i te whānuitanga o ngā hangarau ki te whakaiti i te tūponotanga o te hanganga o te karere hapa tuku.

huaina te hangarau tuatahi te waehere poraka, a ko te nuinga pāngarau i roto i te natura. whakaurua waehere Noiseless mo te wa tuatahi i roto i tenei puka i roto i te 1950, ka taea fakatonutonu waehere poraka kotahi anake hapa. O te akoranga, e whai hua ana enei waehere, engari tū he momo o te rangahau me te whanaketanga hoki mo te wa roa. Ko te hua ko te piha katoa o waehere ki te aru me te hapa maha tika.

Ko tētahi atu hangarau e faaite te waehere mana hapa, - ngana ki mahino te whakawaehere me wetemuna, te ahua me te hapa i roto i ngā o te ariā o te tūponotanga. Ka rite ki te hua, kua hanga rangahau wā roa-te piha waehere Nonblock, i roto i nei te waehere convolutional whakamahia tino whānui.

I roto i te mau hitu ahuru o te rau tau whakamutunga, kua enei tikanga e rua whakaaro i roto i te rua kotahi, me te hua e pae hopea te whakahaere ki te tiki rite aua waehere, i arahina reira i roto i tona tuhinga, Shannon. Ka rite ki te hua o te plurality o mahi iahiko e rua i hanga e kua whakaarohia waehere utuafare, a ngā taumata teitei whakarite tapatahi karere i roto i tona tuku i roto i nga awa kōrero.

Taua ko te hītori o te hanganga o te hapa te whakatikatika waehere. O te akoranga, whakaarohia tenei ra te whānui o iahiko me ngā ariā o te tiaki o te mōhiohio tuku e he functionals rerekē, hapanga, tika o te hanganga, te kakama, me te tahi atu tawhā matua momo.