Ngā momo o tohu: tairitenga, mamati, mamati

Katoa ra, e fehangahangai iwi ki te whakamahi o ngā pūrere hiko. Te kore ratou, te ora hou e taea. Kei te korero tatou e pā ana ki te TV, reo irirangi, rorohiko, waea, me te tahi atu mau mea multivarka. I mua, he tau torutoru ki muri, e kore tetahi whakaaro e pā ana ki te mea kua whakamahia ahua o te tohu mo ia kōwae operable. Na kua roa kua ki te kupu "tairitenga", "mamati", "mamati" i te rongo. Ētahi momo o enei tohu e-kounga tiketike, me te pono.

whakamahia tuku Digital i nui i muri atu i tairitenga. Ko e tika ana ki te meka tenei e he nui māmā ki te mau tonu te tohu, a kihai i pera ake taputapu i taua wa.

Ki te ariā o "motuhake" anga tangata katoa tonu. Ki te iriti koe te kupu i Latin, te auraa ko reira he "te whakamutu". Te ihupuku tawhiti ki te pūtaiao, e nehenehe tatou e te mea e te tohu mamati ko te tikanga o whakawhitihia ngā mōhiohio, e whai wāhi te tauiraa i roto i te wa o te reo-kawe. Ko te whakamutunga e tetahi uara i taea katoa. Na te motumotu haere i te ara, i muri i i whakaritea e te reira ki te whakaputa i te pūnaha i runga i te maramara. He ōrite ratou, me katoa o nga wae taunekeneke tata ki ia atu. Ko te āhua motuhake e rite te ritenga atu katoa - i oti taipitopito katoa kua ka hono ki ētahi atu e tikanga o ngā hononga motuhake.

tohu

Ko te tohu ko te waehere motuhake tuku nei i roto i te wāhi o te kotahi, neke atu rānei ngā pūnaha. Ko te noa tenei reo.

I roto i te mara o te mōhiohio me te kōrero tohu i huaina pāpāho motuhake o tetahi raraunga whakamahia e te ki te tuku karere. Ka taea te hanga te reira, engari e kore e whāngai, e kore te mea e tika ana te huru muri. Ki te ko te tohu he karere whakaaro ana "ika" te tika.

waehere whakaahuatia raraunga tautuhia e te pānga pāngarau. whakaahua ana te reira i te huringa taea katoa o ngā tawhā. Te ariā hiko, whakaaro tenei tauira ko te turanga. Ko te tohu orotahi kua huaina haruru. Ko reira he mahi o te wa, i te mea noa ki te taunekeneke ki te waehere tuku a faahuru reira.

Ko te tuhinga whakaahua ana te momo o tohu: mamati, tairitenga me mamati. Ano poto homai te ariā taketake o te kaupapa whakaahuatia.

momo o tohu

He maha ngā momo o te whakarōpū o tohu tīariari. Kia kite tatou he aha e nga momo.

1. E ai ki te reo ngā kawe raraunga tohu hiko tinana, whatu, oro, me te hiko. He maha atu momo, engari e kore e mohiotia te pai ratou.
2. Na roto i te ara o tohu tohutoro e wehea ki auau, me te kōhikohiko. Ko te tuatahi ko te tikanga tuku raraunga deterministic, e kua tautuhia e te mahi tātari. whakatakoto Random te i te utu o te ariā o te tūponotanga, me te tango ratou i tetahi uara i rerekē wā wā.
3. Tei runga i te mahi e whakaahua tawhā tohu katoa, kia waiho tikanga tuku raraunga tairitenga, motuhake, mamati (he tukanga quantized nei i te taumata). E whakamahia ratou mo te mahi o maha whakaaro hiko.

Na he maheni ki ngā momo katoa o te tangata kē te kaipānui. Mahino ratou kahore raruraru ki tetahi, te mea matua - ki te whakaaro i te iti, me te mahara ahupūngao tiketike-kura.

He aha te tohu tukatuka te?

tukatuka te tohu i roto i te tikanga ki te tuku me te farii i ngā mōhiohio, whakamuna nei te reira. Kia te nekehia atu te reira, ka taea te whakamahi i te reira i roto i ngā huarahi. I roto i te tahi mau āhuatanga whakahōpututia reira.

Tera atu ano tetahi take mo te tukatuka o tohu katoa. Ko te auau hukihuki iti (kia rite kore ki te tūkino i te mōhiohio). I muri i taua, kua whakahōpututia reira, ka tuku i kīia e puhoi.

Ko te tohu tairitenga me mamati, kei te whakamahia ngā rautaki motuhake. I roto i ngā, tātari, convolution, te faatanoraa. E tika ana ki te whakahoki i te tohu ratou, ki te he te reira papaka ranei he haruru.

Creation me te whanaketanga

E mea pinepine te tohu e hiahiatia ana mō te hanga i tētahi tairitenga-ki-mamati (ADC) me (DAC) pūtahuri mamati-ki-tairitenga. Nuinga o ngā wā, ko e rua whakamahia anake i roto i ngā āhuatanga ki te DSP-hangarau ratou. I roto i te wā atu, te whakamahi anake o tika ana DAC.

A, no te hanga koe i te waehere tairitenga tinana ki atu te whakamahi o ngā tikanga mamati whakawhirinaki i runga i te kōrero tuku e te ki mea motuhake.

whānuitanga hihiri

tātai ngā tohu e te rerekētanga nui me rōrahi iti, e kua whakahuatia i roto i waeoro. Ko tino ti'aturi i runga i nga āhuatanga mahi, me te mahi ia. Kei te korero tatou e pā ana ki te ara waiata me te Kōrero tikanga i waenganui i te iwi. Ki te tangohia e tatou, mo te tauira, te auvaha e pānui te rongo, he tawhio noa tona whānuitanga hihiri 25-30 DB. A i roto i te korerotanga o tetahi mahi e taea e ia tupu ake ki te 50 DB.

Ko te tohu tairitenga

He tonu te tohu tairitenga i wa, te tikanga tuku raraunga. He ngoikoretanga taea te huaina te hakari haruru, e ētahi wā arata'i ki te mate tino o te mōhiohio. Tino maha i reira e āhuatanga e ko e taea ki te whakatau i te wahi i roto i te waehere te raraunga tino nui, me te wahi i te distortions mua.

Ko reira no te mea o tenei tukatuka tohu mamati riro kua he rota o te rongonui, me te te āta whakakapi tairitenga.

tohu mamati

Ko te tohu mamati ko te rere raraunga ngā, kua whakaahuatia ai i te utu o ngā mahi motuhake. kia tango i ona kaha tīwera te uara motuhake o te kua tautuhia. Ki te taea e ki te mahi ki te nui nui o te haruru te tohu tairitenga ko, te whiriwhiringa mamati i roto i te nuinga o te reo hua.

I tua atu, tenei ahua o raraunga whakawhiti ai ngā mōhiohio, kahore nui kawenga pū. I muri i tetahi teihana tinana e taea te tono tangata ki waehere maha.

Ngā momo o te tohu mamati kore e tīari, rite tu te reira rite te tikanga whakawhiti raraunga motuhake, me te motuhake. tohu te reira i te awa pūtakerua. I roto i to tatou wa, whakaaro te tohu kei te ki hei te rongonui tino. Ko e tika ana ki te noho pai o te whakamahi tenei.

Taupānga o Digital Signal

He aha te mea te rerekētanga i waenganui i te tohu hiko mamati i te tahi atu? Ko te take i he taea ki te hanga i te ora tonu i roto i te transponder ia. A, no te e tango te taputapu kōrero he tohu he te pokanoa iti, te reira e taui tonu tona ahua ki mamati. Tenei taea, hei tauira, te pourewa TV ki te whakaputa ano he tohu, engari kahore te pānga haruru.

I roto i taua take, ki te te kua tukua te waehere ki distortion nui, ka, kāore, e kore te mea ia i raro ki te toe fakafoki. Ki te tangohia e koe i roto i versus hononga tairitenga, ka i roto i te āhuatanga ōrite, te repeater taea unu wahi o nga raraunga, te haamau'araa i te rota o te pūngao.

Te matapaki i te kōrero pūtau i roto i ngā hōputu, ki te distortion kaha i roto i te rārangi mamati he tata e taea ki te kōrero, no te mea kahore ratou e rongo kupu kīanga katoa ranei. He whai hua atu te hononga tairitenga i roto i tenei take, no te mea ka taea e koe tonu ki te whai wāhi i roto i te kōrero.

Ko reira no te mea o taua mau fifi o repeaters tohu mamati hanga rawa maha i roto i te tikanga ki te whakawhāiti i te hono āputa.

tohu Mamati

Na kei te te whakamahi i te katoa he waea pūkoro etahi ahua o "kaiwaea" i runga i tō rorohiko ranei. Ko tētahi o nga mahi o ngā pūrere ranei te pūmanawa - he tuku tohu, i roto i tenei take i te awa reo. Hei whakawhiti ngaru tonu titau te hongere e pai ai kia te taumata teitei o te kaha e puta. Ko te aha hanga te whakatau i ki te whakamahi i te tohu mamati. e kore e hanga e ia te poipoi iho, me tona ahua mamati. He aha te mea e? No te mea ko te tuku i te toi (hei tauira, waea rorohiko ranei). He aha e nga painga o tenei momo o te whakawhitinga raraunga? Ki te heke te reira whakaritea te nui katoa o te raraunga tuku te me māmā pānui puranga.

Ko te ariā o "te kohi" Kua roa kua whakamahia i ngā wā katoa i roto i te engineering rorohiko. Nā ki te tohu taua e kore he tonu e tuku i te mōhiohio, e te tino whakawaeheretia pūāhua motuhake me pukapuka, me te raraunga i kohia i roto i te poraka motuhake. Ko ratou matūriki motuhake, me te oti. Tenei tikanga whakawaehere kua roa i taumaru iho, engari e kore e ngaro rawa. Ki reira ka taea e ngāwari koe te whakawhiti nga wahi iti o te mōhiohio.

Whakatauritenga o tohu mamati me tairitenga

Hoko taputapu, whakaaro whakauaua te tangata e pā ana ki te mea momo o tohu e whakamahia ana i roto i te kotahi ara i tetahi mea ranei, me e pā ana ki to ratou taiao, me te āhua noa atu. Otiia ētahi wā tonu i ki te mahi ki te ariā.

Kua roa kua reira mārama e ki te hangarau tairitenga ngaro tono, no te mea he koretake o ratou te whakamahi. Engari mai kōrero mamati. whai ki te matau te mea i haere i runga i me he aha paru o te tangata koe.

I roto i te poto, te tohu tairitenga - he tikanga o whakawhitihia ngā mōhiohio, i ngā whakaahuatanga raraunga mahi tonu o te wā. I roto i te meka, āta korero, te kaha tīwera oscillation taea e rite ki tetahi uara i roto i te rohe tautuhi.

whakaahuatia tukatuka tohu Digital e te mahi wā motuhake. I roto i te mau parau te tahi atu, te kaha tīwera o te oscillation o tenei tikanga, ko te uara tino whakaritea.

Moving i ariā ki te mahi, me ka mea ai e te āhuatanga o te raweketia tohu tairitenga. Ki te mamati he kahore raruraru pera, no te mea ia pai ratou "maeneene atu". Nā ki hangarau hou tikanga taua whakawhiti raraunga taea i runga i to ratou ake, kahore te wawaotanga o te pūtaiao ki te whakahoki i te kōrero taketake katoa.

Korero o te pouaka whakaata, ka taea e kua matou te mea ki te tino e kua roa ra io tairitenga tuku tona whai. Kei te whakawhiti te nuinga kiritaki ki te tohu mamati. ngoikoretanga whakamutunga ko e ki he ahei o te fariiraa i tetahi pūrere, te ara atu hou te tuku tairitenga - taputapu motuhake anake. Kua roa hinga ahakoa tono mo te tikanga tawhito, heoi ko tonu e kore enei momo o tohu taea ki te rawa tiki atu i te ora ia.