Ingabe i-plus version ye-AAC yenza kube ngcono kuzo zonke izimo?
Ungase ucabange ukuthi i-Apple inesibopho sokuthuthukisa ifomethi ye-AAC Plus (ngezinye izikhathi ibizwa ngokuthi i-AAC +). Kodwa, empeleni, igama lebhizinisi elisetshenziswa yi- Coding Technologies yefomethi yabo yokucindezela ye-HE-AAC V1. Uma uzibuza ukuthi ingabe i-HE ingxenye yegama limelela, khona-ke kulula ukuphumelela okuphezulu . Eqinisweni, i-AAC Plus ivame ukubizwa ngokuthi i-HE-AAC kunokuba isebenzise igama elilodwa noma uphawu.
Izandiso zefayili yefomethi yomsindo ehambisana ne-AAC Plus yilezi:
- .m4a
- .MP4
- ., M4b
- .m4V
Kodwa, uyini umehluko phakathi kwalokhu nefomethi ejwayelekile ye- AAC ?
Inhloso eyinhloko ye-HE-AAC (High-Efficiency Advanced Encoding Audio) yilapho umsindo udinga ukukhokhwa ngokuphumelelayo ngamanani aphansi. Esinye sezibonelo ezinhle kakhulu yilokhu lapho izingoma zidinga ukusakazwa phezu kwe-Intanethi isebenzisa inani elingaphansi lomkhawulokudonsa kungenzeka. Uma kuqhathaniswa ne-AAC evamile kungcono kakhulu ekulondolozeni ikhwalithi ebonakalayo ngezinga elingaphansi kwezingu 128 Kbps - ngaphezulu ngokuzungeze ama-48 Kbps noma ngaphansi.
Ungase ucabange ukuthi kungcono ekukhomeni umsindo ngezinga eliphezulu kakhulu futhi. Ngempela, akuyona i-Plus emva kwe-AAC (noma i-HE ngaphambi kwayo) akunike umqondo wokuthi kungcono nxazonke?
Ngokudabukisayo lokhu akunjalo. Ayikho ifomethi ingaba yinhle kukho konke futhi yilapho i-AAc Plus inesidingo uma iqhathaniswa ne-AAC ejwayelekile (noma ngisho ne-MP3). Uma ufuna ukulondoloza ikhwalithi yokurekhoda komsindo usebenzisa i- codec elahlekile , kusengcono ukusebenzisa i-AAC ejwayelekile lapho ama-bitrate namasayizi wefayela engeyona inkinga yakho enkulu.
Ukuhambisana Ne-iOS Ne-Android Devices
Yebo, iningi (uma kungenjalo) amadivaysi aphathekayo asekelwe ku-iOS ne-Android azokwazi ukunciphisa umsindo kwifomethi ye-AAC Plus.
Amadivaysi e-iOS aphezulu kune-version 4, amafayela e-AAC Plus aqoshiwe ngekhwalithi ephezulu. Uma une idivayisi ye-Apple eyekhulile kunalokhu uzobe usakwazi ukudlala lawa mafayela, kodwa kuyoba nokunciphisa ukuthembeka. Lokhu kungenxa yokuthi ingxenye ye-SBR, equkethe imininingwane ephezulu kakhulu (ehamba phambili), ayisetshenzisiwe uma i-decoding. Amafayela azophathwa njengama-encoded nge-AAC-LC (i-Low Complexity AAC).
Kuthiwani Mayelana Nezici Zabezindaba Zesofthiwe?
Izinhlelo zezindaba ze-Software ezifana ne-iTunes (inguqulo 9 nangaphezulu) kanye ne-Winamp (version pro) isekela ukufaka ikhodi nokucubungula kwe-AAC Plus. Ngenkathi enye isofthiwe efana ne-VLC Media Player ne-Foobar2000 ingadlala kuphela amafayela womsindo we-HE-AAC.
Indlela Ifomathi Ephumelela Ngayo I-Audio
I-algorithm ye-AAC Plus (esetshenziswa ngamasevisi omculo wokusakaza njengoPandora Radio), isebenzisa ubuchwepheshe obubizwa ngokuthi i-Spectral Band Replication (SBR) ukuthuthukisa ukukhiqizwa komsindo ngenkathi kunciphisa ukusebenza kahle kokucindezela. Lolu hlelo luchaza ngempela ama-frequencies alahlekile ngokudlulisa ama-frequencies aphansi - lezi zigcinwe ku-1.5 Kbps. Ngesinye isikhathi, i-SBR isetshenziswe nakwezinye izinhlobo ezifana ne-MP3Pro.
Ukusakaza Umsindo
Kanye nama- media media abadlali abeseka i-AAC Plus, amasevisi omculo oku-intanethi njengoPandora Radio okukhulunywe ngaye ngaphambilini (nezinye izinsizakalo zomsakazo we-Intanethi ) angasebenzisa le fomethi ekusakaza okuqukethwe. Kuyinto uhlelo lokusebenza oluhle lokunciphisa umsindo oluzosetshenziselwa ngenxa yezimfuneko zalo eziphansi zomkhawulokudonsa - ukukhulumisana kwenkulumo ikakhulukazi lapho ngisho nokuya ngaphansi kwe-32 Kbps kuvamile izinga elimamukelekayo.