Technical Details
The 3GP and 3G2 file formats are both structurally based on the ISO base media file format defined in ISO/IEC 14496-12 - MPEG-4 Part 12, but older versions of the 3GP file format did not use some of its features. 3GP and 3G2 are container formats similar to MPEG-4 Part 14 (MP4), which is also based on MPEG-4 Part 12. The 3GP and 3G2 file format were designed to decrease storage and bandwidth requirements in order to accommodate mobile phones.
3GP and 3G2 are similar standards, but with some differences:
- 3GPP file format was designed for GSM-based Phones and may have the filename extension .3gp
- 3GPP2 file format was designed for CDMA-based Phones and may have the filename extension .3g2
Some cell phones use the .mp4 extension for 3GP video.
Read more about this topic: 3GP And 3G2
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