AAC (Advanced Audio Coding) is a technology provided by Dolby Laboratories for music, which can accommodate up to 48 audio tracks with a sampling rate of 96 KHz. Appears in 1997, which is an audio coding technology based on MPEG-2. By Flawn Hof IIS, Dolby, Apple, AT & amp； T, Sony and other companies * * * replaced mp3 format. In 2000, the MPEG-4 standard was introduced, and AAC re-integrated its characteristics, so it is now also called MPEG-4 AAC, namely m4a.
The full name of MP3 is Audio Layer III of Moving Picture Experts Group. This is a popular digital audio coding and lossy compression format. It aims to greatly reduce the amount of audio data, but for most users, the sound quality of playback has not decreased significantly compared with the original uncompressed audio. It was invented and standardized in 199 1 by a group of engineers from Fraunhofer-Gesellschaft in Hellem.
So MP3 has a longer history.