What audio format is aac?

aac is a lossy compressed audio format. The Chinese name is "Advanced Audio Coding". It uses a new algorithm for encoding, which is more efficient and has a higher "cost-effectiveness"; using the AAC format, It can make people feel that the sound quality is not significantly reduced, and it is more compact.

The operating environment of this tutorial: Windows 7 system, Dell G3 computer.

What audio format is aac?

AAC (Advanced Audio Coding), Chinese name: Advanced Audio Coding. Appeared in 1997, based on MPEG-2 audio coding technology. It is jointly developed by Fraunhofer IIS, Dolby Laboratories, AT&T, Sony and other companies with the purpose of replacing the MP3 format.

AAC is a file compression format designed specifically for sound data. Different from MP3, it uses a new algorithm for encoding, which is more efficient and has a higher "cost-effectiveness". Using the AAC format can make people feel that the sound quality is not significantly reduced, and it is more compact. Apple iPod and Nokia mobile phones support audio files in AAC format.

Advantages: Compared with mp3, AAC format has better sound quality and smaller file size.

Shortcomings: AAC is a lossy compression format, and there is an "essential" gap in sound quality compared with the popular lossless formats such as APE and FLAC. In addition, USB3.0 with faster transmission speed and large-capacity MP3 above 16G are accelerating in popularity, which also makes AAC’s “compact” halo no longer exist.

Features

①Improved compression rate: higher sound quality can be obtained with smaller file size;

②Support multi-channel: Can provide up to 48 full-range sound channels;

③ Higher resolution: supports up to 96KHz sampling frequency;

④ Improved decoding efficiency: decoding and playback takes up fewer resources ;

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