What does MP3 stand for. I saw they now have MP4 songs why?

Answer 1

MP3 stands for MPEG-3. MP4 stands for MPEG-4. Contrary to popular belief MP4 is not something new. AAC which is what iTunes music is based on is a MP4 format and has been around for years. It's not necessarily better sounding than what MP3 is but is much easier to attach video to hence why that is the basic format that most video players use. Mp4 is also backwards compatible with MP3 so that a MP4 player will play MP3 files.

Answer 2

MPEG-1 Audio Layer 3, (Moving Picture Experts Group M-PEG) more commonly referred to as MP3, is an audio encoding format.

It uses a lossy compression algorithm that is designed to greatly reduce the amount of data required to represent the audio recording, yet still sound like a somewhat faithful reproduction of the original uncompressed audio to most listeners. It was invented at the University and the IIS institute of Erlangen, Germany by a team of European engineers of , Fraunhofer Society Germany, IRT, CCETT and Philips, who worked in the framework of the EUREKA 147 DAB digital radio research program, and it became an ISO/IEC standard in 1991.

MP3 is an audio-specific format. The compression removes certain parts of sound that are outside the normal human hearing range so cannot be heard by the listener. It provides a representation of pulse-code modulation — encoded audio in much less space than straightforward methods, by using psychoacoustic models to discard components less audible to human hearing, and recording the remaining information in an efficient manner. Similar principles are used by JPEG, an image compression format

And MP-4

MPEG-4 is a suite of standards which has many "parts", where each part standardizes various entities related to multimedia, such as audio, video, and file formats.
MPEG-4 Part 14, formally ISO/IEC 14496-14:2003, is a multimedia container format standard specified as a part of MPEG-4. It is most commonly used to store digital audio and digital video streams, especially those defined by MPEG, but can also be used to store other data such as subtitles and still images. Like most modern container formats, MPEG-4 Part 14 allows streaming over the Internet. The official filename extension for MPEG-4 Part 14 files is .mp4, thus the container format is often referred to simply as MP4. Devices that play .mp4 files are referred to as MP4 players.

Answer 3

Okay Hi, mp3 stands for music player three and an mp4 is vidios

Answer 4

They are both compression schemes for audio and/or video memory.

Without a compression scheme your Ipod would only hold 20 songs or so.