AAC File: Gịnị bụ AAC Format? Best Settings maka High AAC Quality?

Bụ AAC mma karịa MP3?

AAC e mepụtara ka a nọchiri MP3. Ma MP3 na AAC bụ lossy mkpakọ faịlụ, ha nile nwere ha kpọkwara na demerits. Ihe atụ, AAC nwere a elu ụda àgwà tụnyere MP3, na ọ bụ na-obere. MP3, na aka nke ọzọ, bụ ihe dakọtara na ihe media Player na ngwaọrụ karịa AAC. Ọ bụrụ na i mee ihe nile ihe echiche, ọ bụ ike iji chọpụta nke format dị mma karịa ndị ọzọ. Otú ọ dị, ọ bụrụ na ị na-achọ ụda àgwà àgwà na file size, mgbe AAC bụ ihe kasị mma file gị. MP3 dị mma mgbe atụle ndakọrịta okwu.

• Part 1. Gịnị bụ AAC File? Na mmalite nke AAC Format?
• Part 2. AAC-LC vs O-AAC: Gịnị bụ AAC-LC / O-AAC na Differences?
• Part 3. Best Setting maka AAC Format
• Part 4. AAC Codec aro
• Part 5. Best AAC Ntụgharị

Part 1. Gịnị bụ AAC File? Na mmalite nke AAC Format?

# 1. AAC Format:

AAC nke bụ obere ụdị n'ihi Advanced Audio nzuzo na-ezo aka a etozu, lossy mkpakọ na ngbanwe usoro maka digital ọdịyo. Ọ e mepụtara na-nọchiri nke MP3 format. Mgbe koodu na yiri bitrates, AAC oji mma ụda àgwà karịa MP3. AAC e kere na onyinye nke ụlọ ọrụ ndị gụnyere Fraunhofer IIS, Dolby Laboratories, AT & T Bell Laboratories, Nokia na Sony Corporation. Na 1997, ọ e kwuru mba ọkọlọtọ site N'ịga Foto ọkachamara Group. Ọ na-kpọmkwem dị ka akụkụ nke 7 nke MPEG-2 ọkọlọtọ, na subpart 4 nke akụkụ 3 na MPEG-4 ọkọlọtọ. The mmepe na evolushọn nke AAC agụnye dị iche iche atụmatụ dị ka AAC 2.0 nke bụ version 2 nke AAC nke dabeere SBR, na parametric stereo nzuzo ngwaọrụ na MPEG-4 Audio ọkọlọtọ.

# 2. AAC SBR:

AAC SBR ka eji na mmepe nke AAC audio format na-ezo aka spektral Band replication na zuru. Ọ bụ a technology mee aka audio codecs, karịsịa ala bitrates.

# 3. AAC baraaka:

AAC stereo na mmepe nke AAC bụ usoro nke ụda amụba na Nleta-aghọgbu nke multi-directional audible anya. Ọ na-enweta site na eji nke abụọ ma ọ bụ karịa, nọọrọ onwe audio ọwa. AAC 5.1 bụ ọkọlọtọ n'ihi na mgbasaozi ụda na AAC ọdịyo. Egbu, AAC ADTS (Audio Data Transport Stream) bụ a format tinye n'ọrụ site na MPEG-TS na-enubata AAC ọdịyo.

Part 2. AAC-LC vs O-AAC

# 1. O-AAC:

O-AAC na-ezo aka High-arụmọrụ Advanced Audio nzuzo. Ọ bụ ihe na audio nzuzo format maka lossy data mkpakọ nke dijitalụ ọdịyo. A na-akpọ MPEG-4 Audio profaịlụ IEC / ISO 14496-3. The nzuzo bụ ndọtị nke AAC LC na na kachasị ala bitrates.

# 2. AAC-LC:

AAC-LC ezo aka Low Complexity AAC. Ọ na-akasị kachasị elu bitrates. LC comprises nke a isi format nke dị ka AT na T si Perceptual Audio nzuzo (PAC) format na Na ɛhe Noise n'ịkpụzi.

# 3. Differnces N'etiti O-AAC na AAC-LC:

1. O-AAC dị mma maka ala bitrates dị ka 80kbps na n'okpuru mgbe AAC LC na kachasị elu bitrates dị ka 90kbps na n'elu. Na ikpe, O-AAC dị mma ma ọ bụrụ na ị na-eme atụmatụ na-akpọ faịlụ na kọmputa na iji a software dakọtara ma ọ bụ mgbe ngbanwe na ala bitrates. N'aka nke ọzọ, LC-AAC adabara hardware nkwado na ngbanwe na elu bitrates dị ka 90kbps na n'elu.
2. LC-AAC ọnwụ sọ gị batrị ụgwọ ma na ala ụgbọ ala gị ma ọ bụ mkpanaka gị na ngwaọrụ mgbe O-AAC uzo batrị gị nnọọ mfe.
3. The O-AAC bọmbụ V1 ụda àgwà na 64 KB / s yiri AAC-LC na 96 KB / s.

Part 3. Best Setting maka AAC Format

Bit Rate: 320kbps ma ọ bụ elu 2 ọwa (a elu bitrate bụ mgbe niile ka mma, Otú ọ dị, na 256 kbps bụkwa anabata).

Sample Rate: 44.1Khz

Channels: 2 (stereo)

Part 4. AAC Codec aro

# 1. AAC-LC:

AAC na-ezo aka na ala mgbagwoju AAC. Ọ na-akwado maka mono / stereo / 5.0 / 5.1 ọdịnaya na ọkọlọtọ nlele ọnụego si 8 na 48 kHz.

Akwado OS: Android 4.1+, Windows 8 ekwentị na processor MSM8x27, MSM8x30, MSM8960 na MSM8974
akwado Container: 3GP, 3G2, MP4, M4A, MPR, AAC

# 2. O-AACv1 (AAC +):

Nke a codec anọchi HE- AAC version 1 profaịlụ. The codec utilizes spektral Band replication (SBR) aka na mkpakọ arụmọrụ ke ugboro domain. Ọ na-akwado ndị mono / stereo / 5.0 / 5.1 ọdịnaya na ọkọlọtọ nlele ọnụego si 8 na 48 kHz.

Akwado OS: Android 4.1+, Windows 8 ekwentị na processor MSM8x27, MSM8x30, MSM8960 na MSM8974
akwado Container: 3GP, 3G2, MP4, M4A, AAC

# 3. O-AACv2 (enwekwukwa AAC +):

Nke a bụ HE- AAC version 2 profaịlụ ma ọ enyekwara SBR na Parametric baraaka (PS) iji na-akwalite mkpakọ arụmọrụ nke stereo n'ókè. The version bụ imeziwanye na a etozu version maka AAC gbakwunyere. Ọ na-akwado stereo / 5.0 / 5.1 ọdịnaya na ọkọlọtọ nlele ọnụego si 8 na 48 kHz.

Akwado OS: Android 4.1+, Windows 8 ekwentị na processor MSM8x27, MSM8x30, MSM8960 na MSM8974
akwado Container: 3GP, 3G2, MP4, M4A, AAC

# 4. AAC-ELD (enwekwukwa ala-egbu oge AAC):

Makwaara dị ka MPEG-4 Low Oge Audio coder. Ọ na-agwakọta uru nke perceptual audio nzuzo na a ala na-egbu oge ka mma abụọ na-ụzọ nkwurịta okwu. Ọ na-enye nkwado maka mono na stereo ọdịnaya na ọkọlọtọ nlele ọnụego si 16 48 kHz.

Akwado OS: Android 4.1+
na-akwado Container: 3GPP (.3gp), MPEG-4 (.mp4, .m4a), MPEG-TS

# 5. AAC-HEv2:

Nkwado maka mono ma ọ bụ stereo ọdịnaya na ọkọlọtọ nlele ọnụego si 16 48 kHz.

Akwado OS: Android 4.1+
na-akwado Container: 3GPP (.3gp), MPEG-4 (.mp4, .m4a)

Part 5. Best AAC Ntụgharị

iSkysoft iMedia Ntụgharị Deluxe bụ kasị ukwuu ngwọta niile video na audio akakabarede ọrụ. Ọ na-akwado akakabarede n'etiti ihe karịrị 150 faịlụ na ndị ọhụrụ a na-kwukwara na ọhụrụ upgrades. Ọ bụrụ na ị chọrọ iji tọghata ọ bụla faịlụ, ị pụrụ ịgbaso atọ dị mfe nzọụkwụ na-esi na a format nke bụ enyi na enyi gị media player. The AAC Ntụgharị-azọpụta gị data n'etinyeghị na àgwà nke faịlụ gị, ma ị nwere ike tọghata ozugbo na ngwaọrụ format site n'ịhọrọ ngwaọrụ ụdị dị ka mmepụta format si AAC. I nwekwara ike wụnye a AAC Ntụgharị gị Windows PC ma ọ bụ Mac kọmputa site na-ahọpụta version gị kwadoro sistemụ arụmọrụ kọmputa. The akakabarede ọsọ bụkwa ngwa ngwa, na i nwere ike tọghata a dịgasị iche iche nke faịlụ a laa.