What is the mp3 format? Part 2
MP3 is an audio compression technology, its full name is Moving Picture Experts Group Audio Layer III, called MP3.
It is designed to drastically reduce the amount of audio data. With MPEG Audio Layer 3 technology, music is compressed into a smaller file with a compression ratio of 1:10 or even 1:12, and for most users, the playback quality is not as good as that of the original uncompressed audio. Significant decrease.
MP3 was invented and standardized in 1991 by a group of engineers at the Fraunhofer-Gesellschaft research organization in Erlangen, Germany. Music stored in the form of MP3 is called MP3 music, and a machine that can play MP3 music is called an MP3 player.
Extended information:
MP3 converts the time-domain waveform signal to a frequency-domain signal by using the human ear’s insensitivity to high-frequency sound signals and splits it into multiple frequency bands, using different compression rates for different frequency bands and increasing the compression ratio for high frequencies (even ignoring the signal) Use a small compression ratio for low frequency signals to ensure that the signal is not distorted. In this way, it is equivalent to discarding the high-frequency sound that is basically inaudible to the human ear, and only retaining the low-frequency part that can be heard, thus compressing the sound with a compression ratio of 1:10 or even 1:12. Because the full name of this compression method is called MPEG Audio Player3, people call it MP3 for short.
