mp3 vs mp4

	MP3	MP4
FORMAT	audio	Multimedia container
FILE EXTENSION	.mp3	.mp4
MIME TYPE	Audio/mpeg	Video/mp4, audio/mp4, application/mp4
DEVELOPED BY	a group of engineers from Europe, belonging to Philips, CCETT (Centre commun d'études de télévision et télécommunications), IRT and Fraunhofer Society	ISO
EXTENDED FROM	Mp2	Apple's Quicktime .mov
ORIGINAL NAME	MPEG – 1 Audio Layer 3	MPEG-4 Part 14
HANDLES	Audio only	Audio, Video, Text & images
RELEASED FOR PUBLIC USE ON	7th of July, 1994	2003
PORTABILITY	Virtually all music players support MP3 files.	iPods and iPhones support MP4 files
STANDARDS	ISO/IEC 11172-3, ISO/IEC 13818-3	ISO/IEC 14496-14
ALGORITHM	Lossy Compresssion
POPULARITY	De facto standard for audio files
QUALITY	MP3 offers lower quality than AAC at the same bitrate.
TYPE CODE		mpg4

mp3

                   vs 

 mp4