Different mobile phones support different formats.

Samsung i5820 supports MP3/AAC/AAC+/e-AAC+/WMA and other formats.

MP3 is An audio compression technology, its full name is Moving Picture Experts Compression Standard Audio Level 3 (Moving

Picture

Experts

Group

Audio

Layer

III), referred to as MP3. It is designed to greatly reduce the amount of audio data. Utilize

MPEG

Layer

3

technology, music can be reproduced at 1:10

or even

1:12

compression ratio, compressed into a smaller file size, and for most users, the playback sound quality does not significantly decrease compared with the original uncompressed audio. It was released in 1991

AAC (Advanced

Audio

Coding) was invented and standardized in 2001 by a group of engineers at the Fraunhofer-Gesellschaft, a research organization in Erlangen, Germany. , called "Advanced Audio Coding" in Chinese, appeared in 1997 and was based on

MPEG-2 audio coding technology. It was developed by Fraunhofer

IIS, Dolby Laboratories, AT&T, Sony (Sony) and other companies jointly developed it with the purpose of replacing the MP3 format. In 2000, after the MPEG-4 standard emerged, AAC reintegrated its features and added SBR technology and PS technology. Different from the traditional

MPEG-2

AAC

also known as

MPEG-4

AAC .Advantages: Compared with lossy formats such as mp3, the AAC format has better sound quality and smaller files. Disadvantages: AAC is a lossy compression format. Compared with the popular lossless formats such as APE and FLAC, the sound quality is "essentially" inferior. The gap. In addition, the popularity of USB3.0 with faster transmission speed and large-capacity MP3 above 16G is accelerating, which also makes the "compact" halo over AAC no longer exist.

AAC+ is also called It is HE-AAC. HE means

high

efficiency. HE-AAC mixes AAC and SBR technology. SBR stands for Spectral

Band

Replication (frequency band replication). The key to SBR is to provide full-bandwidth encoding at low bit rates without generating redundant signals