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MP3 stands for MPEG Audio Layer III and it is a standard for audio compression that makes any music file smaller with little or no loss of sound quality. MP3 is part of MPEG, an acronym for Motion Pictures Expert Group, a family of standards for displaying video and audio using lossy compression. Standards set by the Industry Standards Organization or ISO, beginning in 1992 with the MPEG-1 standard. MPEG-1 is a video compression standard with low bandwidth. The high bandwidth audio and video compression standard of MPEG-2 followed and was good enough to use with DVD technology. MPEG Layer III or MP3 involves only audio compression. MP4 or MPEG-4 is a highly compressed video format first introduced in 1998. MP4 follows the standards implemented by the Motion Picture Experts Group (MPEG). This format is a set of standards in which implementation varies depending on purpose. There are about 23 parts or implementations of this format. The Earliest version of MPEG-4 was developed as early as 1993 to 1994 and was originally started as a "very low audio-video bitrate" format. Today, MP4 is used in Internet video streaming, CD distribution, videophones, and even in Television broadcasting.
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