The full name of MP3 is Moving Picture Experts Group Audio Layer III. Simply put, MP3 is an audio compression technology, since this compression mode is called MPEG Audio Layer3, it is simply referred to as MP3. MP3 is a technology using MPEG Audio Layer 3, and the compression ratio of 1:10 or even 1:12, compresses the smaller File, in other words, can compress files to more Small degree. And it is still very good to maintain the original sound quality. It is because the MP3 is small, and the sound quality is high, making the MP3 format almost synonymous with online music. The MP3 format of the music per minute is only about 1MB, so that the size of each song is only 3-4 megabytes. Using the MP3 player for real-time decompression (decoding), so that high quality MP3 music is played.