What's the difference between MP3, MP4 and MP5?

MP3 refers to a music player. . Nowadays, many MP3 players with video function are nicknamed MP3.5 by many people. The difference between MP3 and MP4 is that MP4 should reach a display screen with a resolution above 2.4, a resolution above 320*240 and a color above 6W5,000. Support MP3/MP4/AVI/RM, etc. Its own storage capacity is not less than 20G (there are many large-screen MP3s now, and the space is only 1G-4G. Support memory card expansion, they dare to call MP4, which is a joke). In terms of format alone. MP3 is a pure music file. MP4 is a music video file. MP5 is the abbreviation of MPEGLayer5, which is an algorithm developed by domestic technology manufacturers. MP5 music is a sound file format. In fact, it can make a complete wav, mp3 or cda sound file into a music sound file with a compression ratio of about 1: 10 through MP5 compression technology. MP5 uses a "special compression algorithm" to filter out sounds that humans can't hear, so as to gain more storage space. Therefore, the music compressed by MP5 technology should be slightly worse than MP3, but the audience will not notice it. In fact, this name is just a gimmick of domestic manufacturers. It only improves the compression ratio of MP3. The real MP5 is HK (Heckler &; ; Koch) weapons developed by the company. MPHK54 is named MP5(MachinePistol5) submachine gun.