NTSC vs PAL
Tsis paub dab tsi txog NTSC thiab PAL tsis ua qhov sib txawv loj hauv lub neej ntawm ib tug txiv neej. Cov no yog cov lus luv luv rau TV encoding systems thiab NTSC thiab PAL yog ob lub tshuab uas tau tswj hwm lub ntiaj teb tam sim no. Cov tshuab no yog tsim rau cov kws tshaj lij tshaj tawm thiab lub teb chaws twg siv NTSC lossis PAL yog nyob ntawm qhov zaus ntawm cov khoom siv hluav taws xob siv los ntawm nws. Qhov sib txawv ntawm NTSC thiab PAL yuav pom tseeb rau cov neeg nyeem tom qab nyeem tsab xov xwm no.
Hauv Asmeskas thiab lwm lub tebchaws Asmeskas, cov khoom siv hluav taws xob yog nyob ntawm 60Hz, uas txhais tau tias NTSC teeb liab kuj raug xa tawm ntawm 60fps. Qhov no txhais tau li cas yog tias 30 cov duab raug xa tawm ib thib ob ua raws li 30 kab sib tshuam. Txawm li cas los xij, tus ncej tus nqi siab heev uas tib neeg lub qhov muag tsis tuaj yeem ntes ib qho kev hloov pauv thiab ib tus pom cov duab tsis cuam tshuam zoo li yog zaj duab xis khiav ntawm lub projector. Yog li yog tias koj muaj NTSC TV teeb, koj tau txais 30 dluab ib ob.
Hauv Tebchaws Europe, cov khoom siv hluav taws xob yog 50Hz yog li, cov kab PAL raug xa tawm ntawm 50 kab ib ob, lossis ua haujlwm 25 duab ib ob. Qhov no txhais tau tias 5 ntas ib ob tsawg dua hauv NTSC. Yog li, yog tias koj tab tom saib ib qho kev pab cuam hauv NTSC ntawm PAL, koj yuav pom tias vim tias tsawg dua ntais ib ob, cov lus tsa suab zoo li me ntsis distorted raws li qhov xwm txheej hauv cov yeeb yaj kiab uas ntsiag to, qhov twg cov cim tshwm sim sai dua. Saib cov yeeb yaj kiab PAL hauv NTSC ua rau muaj qhov sib txawv thiab ua rau qhov kev txiav txim saib qeeb dua li qhov nws yog.
Txawm li cas los xij, qhov no tsis yog qhov txawv ntawm NTSC thiab PAL nkaus xwb; kuj tseem muaj qhov sib txawv ntawm qhov pom tseeb ntawm daim duab. Txawm hais tias muaj 5 thav duab ib ob tsawg dua hauv PAL, muaj ntau txoj kab kev daws teeb meem ntau dua hauv NTSC. Whereas, muaj 625 kab ntawm kev daws teeb meem hauv PAL tshaj tawm, tsuas muaj 525 nyob rau hauv cov ntaub ntawv NTSC tshaj tawm. Cov kev daws teeb meem siab dua pom tseeb ua rau cov duab pom tseeb dua hauv PAL. NTSC system yog laus dua PAL thiab nyob rau hauv qhov chaw thaum B / W tshaj tawm hauv vogue. Cov tshaj tawm yuav tsum tau ua ntau yam kev hloov pauv thaum cov xim tshaj tawm tau tshwm sim ntawm qhov chaw. PAL tau tsim tom qab thiab yog li nws yog qhov tsim nyog rau kev tshaj tawm xim. Thaum ib qho kev pab cuam hauv NTSC yuav tsum tau formatted rau PAL, ib tug tuaj yeem pom cov kab dub nyob rau sab saum toj thiab hauv qab uas yog siv los sau cov chaw khoob.
DVD's yog tsim nyob rau hauv NTSC los yog PAL, thiab lawv tsuas yog cia li nqa cov ntaub ntawv audio video compressed sab hauv. Yog tias cov ntaub ntawv nyob rau hauv qhov kev daws teeb meem ntawm 720 × 576 pixels, nws yog hu ua PAL DVD, thiab yog tias qhov kev daws teeb meem yog 720 × 480 pixels, DVD hu ua NTSC DVD. Kuj tseem muaj tus nqi sib txawv raws li, thiab qhov no yog 25fps thaum PAL thiab 30fps hauv NTSC DVD. Cov ntaub ntawv no yog muab los ntawm lub DVD player thiab nws formats cov ntaub ntawv no rau tso saib nyob rau hauv PAL los yog NTSC.
In luv:
Difference between NTSC and PAL
• NTSC stands for National Television Standards Committee, hos PAL stands for Phase Alternating Line.
• NTSC yog siv rau kev tshaj tawm hauv lub tebchaws uas muaj hluav taws xob nyob hauv 60Hz, qhov PAL siv nyob rau hauv cov tebchaws uas muaj hluav taws xob yog 50Hz
• PAL muaj kev daws teeb meem siab dua NTSC
• NTSC muaj ntau dua ntas ib ob ceev (30) dua PAL (25)
• Duab zoo hauv PAL zoo dua hauv NTSC
• Ib txheej ua hauv Tebchaws Europe yuav tsis ua haujlwm zoo hauv Asmeskas.
