Video: Yuav ua li cas yog digitized signals xa?
2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47
Ib qho cov teeb liab yog binary code, ib hom lus ntawm zeroes thiab cov uas cov computers siv los sib txuas lus. Ib tug hauv binary tig rau ntawm teeb liab , thaum xoom tig tawm lub teeb liab . Zoo li lub teeb hloov, digital signals muaj ob tus nqi. Digital signals xa ntu, thaum analog teeb liab xa nruam ntws.
Ib yam li ntawd, tib neeg nug, vim li cas cov cim digitized yog ib txoj hauv kev zoo tshaj plaws los xa cov ntaub ntawv tshaj li kev sib kis analog?
digitized teeb liab yog a txoj kev ntseeg ntau dua mus encode thiab xa cov ntaub ntawv tshaj li cov cim analog . yog transmittal ntawm digital signals nruab nrab ntawm ob los yog ntau cov ntsiab lus hauv kev sib txuas lus. Cov teeb liab tuaj yeem ua binary lossis lwm hom kev sib cais-qib digital mem tes.
Qhov thib ob, vim li cas cov teeb liab digital thiaj li ntseeg tau ntau dua? Qhov zoo ntawm Digital Signal Tshaj Analog Cov teeb liab Digital yog ntau ruaj ntseg, thiab lawv tsis raug puas los ntawm lub suab nrov. Lawv tso cai rau teeb liab kis tau tus kab mob mus ntev. Los ntawm kev siv cov no teeb liab , peb tuaj yeem txhais cov lus, suab, video rau hauv hom lus.
Yog li ntawd, hom teeb liab twg yog qhov kev ntseeg siab dua?
Digitized teeb liab (xa raws li nthwv dej pulses) yog a txhim khu kev qha txoj kev encode thiab xa cov ntaub ntawv.
Cov yam ntxwv tshwj xeeb dab tsi ua rau kev sib kis ntawm cov teeb liab muaj kev ntseeg siab dua li kev sib kis ntawm cov teeb liab?
Cov teeb liab yog a txhim khu kev qha daim ntawv ntawm kis tau cov ntaub ntawv vim tias qhov yuam kev hauv qhov amplitude lossis zaus tus nqi yuav tsum loj heev thiaj li ua rau dhia mus rau qhov sib txawv. Teeb liab yog tsim los ntawm infinite muaj nuj nqis. Teeb liab tsuas yog muaj ob qhov txiaj ntsig tau: 0 lossis 1.
Pom zoo:
Dab tsi yog qhov txawv ntawm analog thiab digital signals?
Analog thiab Digital signals yog hom teeb liab nqa cov ntaub ntawv. Qhov sib txawv loj ntawm ob lub teeb liab yog tias cov teeb liab analog uas muaj hluav taws xob tas mus li, thaum cov teeb liab digital tsis txuas hluav taws xob
Daim duab digitized li cas?
Txheej txheem digitization. Cov txheej txheem digitization feem ntau yog siv los hloov cov ntaub ntawv analog, xws li xov xwm, suab, duab, thiab ntawv, ua tus lej sawv cev los ntawm ob kauj ruam tsis sib xws: Sampling thiab Quantization. Thawj kauj ruam, cov ntaub ntawv raug coj mus rau ib ntus, xws li daim phiaj ntawm pixels siv los sawv cev rau cov duab digital
Puas yog digital signals txuas ntxiv?
Digital Signals tsis txuas ntxiv vim lawv tsis sib cais nyob rau hauv ob lub sij hawm thiab amplitude. Analog signals yog tas li nyob rau hauv ob lub sij hawm thiab amplitude. Li no, Digital signals yog ib qho kev kwv yees ntawm cov teeb liab analog
Yuav ua li cas yog ib co zoo ntawm analog signals?
Qhov zoo ntawm lub kaw lus kaw lus analog yog qhov tsis muaj aliasing distortion thiab quantization suab nrov; qhov dav dynamic ntau yam; thiab kev ua haujlwm hauv cov xwm txheej overload. Cov tshuab digital, lub sijhawm no, muaj kev kaw suab zoo dua thiab kev sib koom ua ke yooj yim dua rau cov khoos phis tawj ntawm tus kheej thiab cov ntawv thov software
Puas yog qhov kis nruab nrab yog ib feem ntawm lub cev txheej vim li cas los yog vim li cas ho tsis?
Lub cev txheej hauv OSI Model yog txheej qis tshaj plaws thiab siv rau kev xa cov ntaub ntawv hauv nws daim ntawv yooj yim: ntsis-qib. Qhov nruab nrab kis tau tus mob tuaj yeem yog wired lossis wireless. Cov txheej txheem ntawm lub cev nyob rau hauv ib tug qauv wired muaj xws li cables thiab connectors uas yog siv los nqa cov ntaub ntawv los ntawm ib qho chaw mus rau lwm qhov