MP3, AAC, WMA, FLAC, ALAC, WAV, AIFF, thiab PCM piav qhia
Feem ntau cov cuab yeej muaj peev xwm ua tau ntau yam ntawm cov xov xwm digital tawm hauv lub thawv, feem ntau tsis muaj software lossis firmware tshiab. Yog tias koj ntxeev dhau los ntawm cov khoom hauv phau ntawv tej zaum koj yuav xav tsis thoob los ntawm seb muaj pes tsawg hom uas muaj.
Dab tsi ua rau lawv sib txawv ntawm ib leeg, thiab qhov no puas tseem ceeb rau koj?
Suab Seev Cov Ntaub Ntawv Nkauj
Thaum nws los txog rau ntawm cov suab paj nruag , puas yog hom ntawv tseem ceeb? Lo lus teb yog: nws nyob ntawm.
Muaj compressed thiab uncompressed audio files , uas tej zaum yuav muaj xws li ib tug lossy los yog lossless zoo rau nws. Cov ntaub ntawv tsis tseem ceeb yuav loj tshaj, tab sis yog tias muaj kev cia siab (piv txwv li, lub PC lossis laptop, lub tshuab khiav lag luam, cov neeg ua hauj lwm tawm tswv yim, thiab lwm yam), thiab koj muaj cov cuab yeej suab paj nruag, muaj cov txiaj ntsim kev siv cov uas tsis muaj suab paj nruag .
Tab sis, yog qhov chaw nyob ntawm tus nqi, xws li hauv smartphones , cov ntsiav tshuaj, thiab cov khoom ntiag tug, los yog koj npaj siab siv cov headphones los yog cov neeg tham, ces cov ntaub ntawv me me ntawm cov ntaub ntawv yog tiag tiag txhua yam koj xav tau.
Yog li cas koj xaiv? Ntawm no yog kev sib cais ntawm ntau hom hom, qee yam ntawm lawv cov yam ntxwv tseem ceeb, thiab yog vim li cas koj yuav siv lawv.
- MP3: Tsim los ntawm Cov Yeeb Yaj Teb Cov Kws Paub Cov Neeg Paub (MPEG), ib lub koom haum uas tsim cov qauv siv rau cov suab thiab suab video, MPEG-1 / MPEG-2 Layer 3 (MP3) yog qhov feem ntau thiab txhawb nqa cov ntaub ntawv lub suab.
- MP3 yog ob qho tib si thiab cov lus suab nrov , nrog rau cov nqi me ntsis ntawm 8 kbit / s mus txog 320 kbit / s, thiab piv txwv frequencies xws li 16 kHz mus txog 48 kHz. Cov ntaub ntawv me me ntawm MP3s txhais tau hais tias cov ntaub ntawv hloov tsheb sai dua thiab siv tsawg dua qhov chaw, tab sis thaum tus nqi qis dua hauv suab zoo thaum piv rau hom ntaub ntawv tawm tsis ua haujlwm.
- AAC: Ua nrov ntawm Apple iTunes, Advanced Audio Coding (AAC) hom ntawv zoo ib yam li MP3, tab sis nrog ib qho ntxiv ntawm kev pab cuam ntau dua.
- AAC yog ob qho tib si compressed thiab cov lus suab, nrog rau cov nqi me ntsis ntawm 8 kbit / s mus txog 320 kbit / s, thiab piv txwv frequencies xws li 8 kHz mus txog qhov siab tshaj-nrog txoj cai ntawm qhov code ntawm 96 kHz.
- Cov ntaub ntawv AAC tuaj yeem xa tib lub suab zoo li MP3 thaum siv sijhawm tsawg dua. ACC kuj txhawb txog li 48 channels, thaum cov ntaub ntawv MP3 feem ntau tsuas lis tau ob leeg. AAC yog dav tshaj tab sis tsis txwv rau iOS, Android, thiab cov gaming gaming.
- WMA: Tsim los ntawm Microsoft ua tus sib tw rau lub MP3, Windows Media Audio Files muab kev zoo sib xws, kev ua lag luam tshwj xeeb. Tus txheej txheem WMA yog ob qho tib si thiab cov lus suab, tab sis newer, cov sub-versions nrog ntau codecs yuav muab ib qho kev xaiv tsis raug.
- Hos muaj ntau hom kev tshaj lij xov tooj thiab cov khoom siv hauv tsev lom ze WMA cov ntaub ntawv los ntawm kev ua haujlwm, ob peb lub xov tooj cua xws li smartphones thiab ntsiav tshuaj ua. Ntau yuav tsum downloading ib tug tshaj app thiaj li ua si WMA suab, uas yuav ua rau nws tsis yooj yim rau siv siv MP3 lossis AAC.
- FLAC: Tsim los ntawm Xiph.Org Foundation, Txoj Kev Tsis Pub Dawb Los Tsis Pub Dawb (FLAC) muaj ntau yam tsis txaus siab vim nws txoj kev tso cai pub dawb thiab qhib hom.
- FLAC yog ob qho tib si thiab tsis muaj suab hom, nrog cov ntaub ntawv zoo mus txog 32-ntsis / 96 kHz (los ntawm kev sib piv, CD yog 16-ntsis / 44.1 kHz). FLAC txaus siab rau qhov kev txo cov ntaub ntawv me me (li ntawm 30 txog 40 feem pua me dua cov ntaub ntawv tseem ceeb) tsis tas yuav muaj kev xyeem zoo, uas ua rau nruab nrab ntawm cov qauv siv digital archiving (ie, muab cov ntaub ntawv sau cia / cov ntaub ntawv rau kev mloog lus).
- ALAC: Apple's version of FLAC, Apple Lossless Audio Codec (ALAC) feem ntau nrog rau lub suab zoo thiab cov ntaub ntawv loj nrog FLAC.
- ALAC yog ob qho tib si lub suab yoojyim thiab kev poob siab. Nws tseem yog tag nrho-txhawb los ntawm iOS no thiab iTunes, whereas FLAC yuav tsis raug txhawb. Yog li ntawd, ALAC feem ntau yog siv los ntawm cov neeg siv cov khoom siv Apple.
- WAV: Tsim los ntawm Microsoft, Waveform Audio File Format yog ib qho qauv siv rau qhov system hauv Windows thiab tau tshaj ntau yam software siv.
- WAV yog ob qho tib si (tab sis kuj tuaj yeem raug cim raws li cov ntawv sau tawm) thiab lub suab tsis zoo, qhov tseem ceeb ntawm daim ntawv qhia qhov tseeb. Cov tib neeg cov ntaub ntawv tuaj yeem siv tau ib qho tseem ceeb ntawm qhov chaw, ua qhov hom ntawv zoo tshaj rau kev siv archiving thiab audio editing. Cov ntaub ntawv WAV audio zoo ib yam li PCM thiab AIFF audio files.
- AIFF: Kuj yog tsim los ntawm Kua, Lub Suab Sib Hloov Cov Ntaub Ntawv (AIFF) yog tus txheej txheem rau kev khaws cov suab ntawm Mac computers.
- AIFF yog ob qho tib si uncompressed (muaj kuj yog ib qho varied variant) thiab lub suab hom lossless. Zoo li Microsoft lub WAV ntaub ntawv hom ntawv, AIFF cov ntaub ntawv tuaj yeem siv ntau qhov chaw cia, ua qhov zoo tshaj plaws rau archiving thiab editing.
- PCM: Siv digitally sawv cev rau analog signals, Pulse Code Modulation (PCM) yog tus txheej txheem rau cov CDs, tab sis kuj rau cov computers thiab lwm cov ntawv suab.
- PCM yog ob qho tib si uas tsis muaj teebmeem thiab poob suab, feem ntau kuj ua haujlwm raws li cov ntaub ntawv qhia txog kev tsim lwm hom suab hom.