Difference between mp1 mp2 mp3 mp4?

Answer 1

The MP1 audio file format used MPEG Layer 1 compression; that supported data rates of 384 kbps and was used primarily by Philips DCC Digital Compact cassettes; which has been, for the most part, replaced by the newer MP2 and MP3 formats.

The MP2 audio file format used MPEG-1 Layer II compression to reduce the file size and for the most part, has mainly been replaced by the ubiquitous MP3 format. However; MP2 is still used for digital radio and digital television broadcasts.

The quality of an MP3 file depends largely on the bit rate used for compression; common bit rates are 128 kbps, 160 kbps, and 192 kbps; higher bit rates result in higher quality files that also require more disk space. MP3 files are supported by most portable music players such as the Apple iPod; Microsoft Zune; and can also be played on the Amazon Kindle. Furthermore, MP3 audio music files can be played on virtually all home based sound systems.

An MP3 file is limited with regard to the method of compression and can only store audio. MP4 on the other hand, can store video as well as audio. It can even store subtitles for a video file. Also, since MP4 is a container, it can store audio and video that have been compressed in different fashions. In fact, an MP4 file could be audio that has been compressed as an MP3.