AC3 Isiguquli

Tshintsha AC3 kuya futhi kusuka kumafomethi ahlukahlukene

Mayelana AC3

AC-3 (Dolby Digital) yindawo yokubuka-yokusakazwa kwesandi esetshenziswa kuma-DVD nama-TV, ethatha ama-channels angama-6.

Ukusetshenziswa Okuvamile

DVD audio
Surround sound
Blu-ray audio

AC3 Ukushintsha

Yini ihele AC3?

AC3 (Dolby Digital) is a multi-channel surround sound audio format.

Ingabe i-AC3 idinga ukudlalwa nge-headphones?

Akunalutho - lokhu kuyi-cinema delivery bitstream. I-AC3 stream ifaka i-multichannel mix esetshenziselwa ukucutshungulwa yi-AV receiver futhi ithunyelwe kuma-speakers angempela abekwe endaweni. Ifoni noma i-laptop kufanele ivuleke ngezansi kuma-channels amabili ngaphambi kokuba ikwazi ukudlala ngaso sonke isikhathi, futhi le-downmix ivame ukuba ne-soundless futhi i-flatter kune-stereo track e mastered njenge-stereo. Guqula uma indawo esiya kuyo i-headphones; gcina uma indawo esiya kuyo i-receiver. AC-3 yi-surround track ngayinye ye-AV receiver, DVD player ne-TV decodes ngokusemthethweni, ngakho-ke ihlala iyi-baseline yokusabalalisa.

Ingabe ubuhle bulahlekile kuhele AC3?

Noma yini encoder yakuqala ekhetha ukuyisusa, futhi ayikwazi ukubuyiselwa. AC3 icindezela ngokumodela lokho okungekuqaphela indlebe - imisindo ekhululekile ehlala ngaphansi kwezikhulu, iziqongo eziphezulu zokulalela - futhi isuse ngokuqhubekayo. Ku-bitrate ephephile engeke ikwazi ukulalela wonke umuntu. Okunye okungaba khona kubuyiselwa emuva, ngakho ukushintshana kufomethi engalahlekelwa yisimo samanje ngaphandle kokubuyisela okungaphambili. AC-3 yisandi esingenalutho esingena-channel, sivame u-5.1 ku-384 noma ku-448 kbps, ne-metadata yokuxoxa nokuhlanganiswa ngezansi.

Kungani umsindo ophumayo ecwecweni uhlala AC3?

Ngenxa yokuthi isilinganiso sediski siyibiza ngokuthi. Umdlali wadinga ukucisha umsindo kwihardware esebenza kahle eqinile ngaphandle kwesoftware noma ukuhlaziywa, ngakho ukucaciswa kwakhetha uhlobo olulodwa futhi wonke umsindo ocindezelwe kusukela wathwala. Lokhu kusho ukuthi umthumeli uphatha lokhu ngaphandle kokukhathazeka futhi umsakazo awuzowuchofoza — uhlobo lwahamba kuwo wonke amathuluzi ajwayelekile, futhi akukho kuphi. AC-3 yiDolby Digital, ifomu elijikelezayo elijwayelekile le-laserdisc, DVD, ATSC broadcast ne-cinema ekuqaleni kuka-1990.

Kungani ihele lami AC3 livela ngaphandle kwegama lesiqongo noma isithombe?

Ngenxa yokuthi ifomu alikho indawo efanele yokuzigcina. AC3 yacaciswa ngaso sonke isikhathi ngaso sonke isikhathi, ngaphandle kwendawo ejwayelekile yesihloko, i-album noma isithombe sokuzivikela, ngakho abadlali babuyela emuva ukukhombisa igama lefayela. Ukushintshana kufomethi ephawuliwe kwenza i-library ifinyeleleke — amathegi abhalwe ngesikhathi sokuguqulwa ngaphezu kokubuyiselwa, ngakho-ke cabanga ukugcwalisa noma yini engingakhombisi i-source. AC-3 ayisebenzi kahle ngokuya ngemigomo yamanje futhi ayivunyelwe yiziphequluli, amafoni noma abadlali abaningi be-web ngaphandle kokuxhuma phezulu kwe-stereo.

Kungani i AC3 ikhona kumadiski amaningi nakwezinye izisakazo uma angizange ngiyikhethe?

Ngenxa yokuthi ilayisense ifakwe kwihardware hhayi ekhethiwe ngumlalela. Ifomethi yacaciswa njenge-audio edingekayo ye-optical disc ne-digital broadcast standards, ngakho wonke umdlali, umtholi kanye nebhokisi leset-top liyi-decoded iminyaka eminingana futhi imboni yezinto eziqukethwe i-encoded kuyo ngokuhambisana. Lo mqondo wokuthi ukhona kuwo wonke amadivayisi egumbi lokuphumula ufana ngokugcwele nokungakholeki kwayo kuma-browsers nama-apps wefoni.

Ingabe ihele AC3 lingathwala i-5.1 surround mix?

Yebo - ifomu liphatha iziqhagamshelanisi ezingaphezu kwezingu-2 ngokufanele, ngakho-ke ukuhlanganisa okugqamile kugcina isakhiwo sesiqhingi saso ngaphandle kokucindezelwa kwe-stereo ngendlela efanele. Uma ukhuluma ngayo njenge-surround kuxhomekeka kukuphela kokuphela: umlayezo uzosusa wonke ama-channels, ifoni izocindezela phantsi ngesikhathi sokudlala ngaphandle kokukhathazeka. Ukushintshana ku-stereo-only format kwenza ukuthi ucindezelwe ngokuqhubekayo.

Ingabe kubaluleke ukuthi AC3 ingaphezu kweminyaka engu-30?

Ubudala bukhona akuyona inkinga - amafomethi amaningi onyaka akhona alungile, ngokucacile ngoba konke kudlule iminyaka eminingi ukuwafaka. Okubalulekile ukuthi unyaka uthathe isinqumo: amafayela amancane, amaprosesa aphansi, akukho nethiwekhi, futhi amakhono angeke afune umuntu. lapho amanani ahlala khona, ifomu lilungile. lapho ayikho, lena yisizathu sokushintsha.

Kungani ihele AC3 alidlalwa kumsakazo wami?

Amabhuleki aqopha uhlu oluncane, oluqinile lwefomethi yomsindo futhi AC3 ungaphandle kwalo, ngakho ihele likhuphuka endaweni yokudlala noma umdlali ukhombisa iphutha. Isofthiwe yedesktop enesethingi se-codec esibanzi ivula ngaphandle kwezinkinga. Uma umsindo udlala kukhasi le-web, ukushintsha kuyinto elungile — akukho ukumiswa komdlali kuzongeza umbhalo oqoshiwe umbhukeli awuthumeli.

Yini i-bitrate okufanele ngiyiguqule amafayela ami AC3?

Uhlu lwendawo esiya kuyo, hhayi umsuka. Ukudlalwa kwengoma, 256 kuya ku-320 kbps kucacile kuwo wonke umuntu olalelayo; ukukhuluma nokulalela, 96 kuya ku-128 kbps kuningi futhi kushiya ihele ngaphesheya. Ukungenisa umsindo ngaphezu komsuka we-bitrate kulahlekile isikhala — kugcina umsindo osele udlulele nge-lossy pass futhi akubuyiseli lutho umngenisi wokuqala olahlekile.

Ingabe ukusebenzisa AC3 kuthatha ilayisense lepatenti?

Akunakho okukudingayo. Ama-codecs ahlobene ahlobene ne-patent pools, futhi ilayisense ibekwe ngabantu abathumela ama-decoders - ifoni, i-browser, i-operating system - isikhathi eside ngaphambi kokuba ihele lifike kuwe. Lokhu kusho ukuthi ifomu likhona kuwo wonke amahardware futhi kungani ama-royalty-free alternatives akhona, futhi ashintshanga noma yini mayelana nokushintsha ifayela oline.

Ingabe ukushintshana kushintsha isilinganiso sesampula se AC3 yami yomsindo?

Akunakwenzeka ngaphandle kokuthi ucela. Ukuguquka kugcina umsuka wezinga — 48 kHz uhlala 48 kHz, 44.1 kHz uhlala 44.1 kHz — ngoba ukusatshalaliswa kabusha kubiza kakhulu futhi akusebenzi uma akukho okudingayo. Iziphuzo zikhona: ama-CD omsindo adinga u-44.1 kHz, abanye abadlali behardware abadala bamukela okuthile, futhi amapayipi omsindo avame ukudinga u-16 kHz. Misela izinga ngokucacile ngalezi zinkinga bese ushiya icala linye.