ISO/IEC 14496-3:2019 December 2019; 4 years ago (2019-12)
Type of format
Lossy audio
Contained by
MPEG-4 Part 14, 3GP and 3G2, ISO base media file format and Audio Data Interchange Format (ADIF)
Standard
ISO/IEC 13818-7, ISO/IEC 14496-3
Open format?
Yes
Free format?
No[3]
Advanced Audio Coding (AAC) is an audio coding standard for lossy digital audio compression. It was designed to be the successor of the MP3 format and generally achieves higher sound quality than MP3 at the same bit rate.[4]
AAC has been standardized by ISO and IEC as part of the MPEG-2 and MPEG-4 specifications.[5][6] Part of AAC, HE-AAC ("AAC+"), is part of MPEG-4 Audio and is adopted into digital radio standards DAB+ and Digital Radio Mondiale, and mobile television standards DVB-H and ATSC-M/H.
AAC supports inclusion of 48 full-bandwidth (up to 96 kHz) audio channels in one stream plus 16 low frequency effects (LFE, limited to 120 Hz) channels, up to 16 "coupling" or dialog channels, and up to 16 data streams. The quality for stereo is satisfactory to modest requirements at 96 kbit/s in joint stereo mode; however, hi-fi transparency demands data rates of at least 128 kbit/s (VBR). Tests[which?] of MPEG-4 audio have shown that AAC meets the requirements referred to as "transparent" for the ITU at 128 kbit/s for stereo, and 384 kbit/s for 5.1 audio.[7] AAC uses only a modified discrete cosine transform (MDCT) algorithm, giving it higher compression efficiency than MP3, which uses a hybrid coding algorithm that is part MDCT and part FFT.[4]
AAC is the default or standard audio format for iPhone, iPod, iPad, Nintendo DSi, Nintendo 3DS, Apple Music,[a] iTunes, DivX Plus Web Player, PlayStation 4 and various Nokia Series 40 phones. It is supported on a wide range of devices and software such as PlayStation Vita, Wii, digital audio players like Sony Walkman or SanDisk Clip, Android and BlackBerry devices, various in-dash car audio systems,[when?][vague] and is also one of the audio formats used on the Spotify web player.[8]
^Cite error: The named reference businesswire was invoked but never defined (see the help page).
^ISO (1997). "ISO/IEC 13818-7:1997, Information technology — Generic coding of moving pictures and associated audio information — Part 7: Advanced Audio Coding (AAC)". Archived from the original on 2012-09-25. Retrieved 2010-07-18.
^Advanced Audio Coding (MPEG-4) (Full draft). Sustainability of Digital Formats. Washington, D.C.: Library of Congress. 22 June 2010. Retrieved 1 December 2021.
^ abBrandenburg, Karlheinz (1999). "MP3 and AAC Explained" (PDF). Archived from the original (PDF) on 2017-02-13.
^ISO (2006) ISO/IEC 13818-7:2006 – Information technology — Generic coding of moving pictures and associated audio information — Part 7: Advanced Audio Coding (AAC) Archived 2016-03-03 at the Wayback Machine, Retrieved on 2009-08-06
^ISO (2006) ISO/IEC 14496-3:2005 – Information technology — Coding of audio-visual objects — Part 3: Audio Archived 2016-04-13 at the Wayback Machine, Retrieved on 2009-08-06
^"The AAC Audio Coding Family For Broadcast and Cable TV" (PDF). 2013. p. 6. Archived from the original (PDF) on 2023-09-28. Retrieved 2024-01-29.
^"Audio file formats for Spotify". Spotify. Retrieved 20 September 2021.
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and 23 Related for: Advanced Audio Coding information
compression#AudioAudio file format List of audio compression formats The term "audiocoding" can be seen in e.g. the name AdvancedAudioCoding, and is analogous...
container file. Although most audio file formats support only one type of audiocoding data (created with an audiocoder), a multimedia container format...
basis for most audiocoding standards, such as Dolby Digital (AC-3), MP3 (MPEG Layer III), AdvancedAudioCoding (AAC), Windows Media Audio (WMA), and Vorbis...
perceptual coding and is widely used in speech coding, while MDCT coding is widely used in modern audiocoding formats such as MP3 and AdvancedAudioCoding (AAC)...
MP3 (formally MPEG-1 Audio Layer III or MPEG-2 Audio Layer III) is a coding format for digital audio developed largely by the Fraunhofer Society in Germany...
Unified Speech and AudioCoding (USAC) is an audio compression format and codec for both music and speech or any mix of speech and audio using very low bit...
FAAC (Freeware AdvancedAudioCoder) is a software project which includes the AAC encoder FAAC and decoder FAAD2. It supports MPEG-2 AAC as well as MPEG-4...
MediaHuman Audio Converter is based on Qt Widgets. High-Efficiency AdvancedAudioCoding Comparison of audio formats List of free software for audio List of...
jointly by ISO and IEC that sets standards for media coding, including compression coding of audio, video, graphics, and genomic data; and transmission...
Coding Technologies AB was a Swedish technology company that pioneered the use of spectral band replication in AdvancedAudioCoding. It is a major provider...
proprietary software. It allows digital audio content, primarily in MP3 or High-Efficiency AdvancedAudioCoding format. The most common use of Shoutcast...
AudioCodes Ltd. is an Israeli-American company that provides advanced communication software, products, and services for enterprises and service providers...
audio coding systems (source coding) depending on the bitrate: MPEG-4 HE-AAC (High Efficiency AdvancedAudioCoding). AAC is a perceptual coder suited...
ATRAC, Cook, AdvancedAudioCoding (AAC), High-Definition Coding (HDC), LDAC, Dolby AC-4, and MPEG-H 3D Audio, as well as speech coding standards such...
High-Efficiency AdvancedAudioCoding (HE-AAC)". "1224887 – Implement OpenMax IL AAC audio decoding client". "Media type and format guide: image, audio, and video...
containing visual (video without audio) data in a video coding format (e.g. VP9) alongside audio data in an audiocoding format (e.g. Opus). The container...
Windows Media Audio (WMA) is a series of audio codecs and their corresponding audiocoding formats developed by Microsoft. It is a proprietary technology...
decoding digital audio in the AdvancedAudioCoding (AAC) format. Fraunhofer IIS, developed this library for Android 4.1. It supports several Audio Object Types...
and MPEG-1 Audio: AdvancedAudioCoding (AAC) Also MPEG-4 Part 3 audio objects, such as Audio Lossless Coding (ALS), Scalable Lossless Coding (SLS), MP3...
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