What are the advantages and disadvantages of the mp3 format? Part 2
Now that MP3 is so popular, you must have thought like me, if there is MPEG Audio Layer-2 or MPEG Audio Layer-1, yes, they exist, and many of us are already using it, but we don’t know it.
For example, the VCD that we often see is recorded and stored in the MPEG-1 compression method.
Well, first of all, the bottom part is the size of the Wave data, in order, it’s MPEG-1, MPEG-2, MPEG-3. Why do we take the Wave data as a reference for our comparison? Because Wave data is an uncompressed music file format, its only advantage is that it is not distorted, so from the image above we can clearly see that MP3 is indeed the most powerful in compression, which can reach 1: The ratio of 10 ~1:12, so we can fit dozens of songs in a small memory. You may be wondering, how is this done?
The principle is very simple. The first is advanced encryption technology, which re-encrypts and compresses all data, and the second is to use data reduction. For example, our human ears aren’t very sensitive to sounds over 15 KHz, so smart scientists thought, since I can’t hear it, why do I record it? So I removed some data to make it smaller, so even if all the data is distorted, we can’t feel it. Sound data in MP3 format is a type of sound wave data. It is a file format that compresses the original sound wave data in MP3. After this special method, a Wave file of almost 50-60 MB can be converted into a file. You need more than 4 MB of files, and the sound quality is almost the same as the original, saving almost ten times the storage space, so an MP3 music CD can contain more than a dozen music CDs and an album of music CDs can play for 60 minutes To calculate, an MP3 music CD can play almost ten hours of music, just like a small music collection cabinet. Well, having said so much, MP3 is good, but because MP3 uses a compressed format, there is some loss in sound quality. However, the lower the compression ratio, the better the effect.
