Convert aac to mpg

What is the difference between .aac and .mpg?

Developer: Bell Labs, Fraunhofer Institute, Dolby Labs, Sony and Nokia; MPEG (Moving Picture Experts Group)

Description: Compressed audio file similar to an .MP3 file, but offers several performance improvements; examples include a higher coding efficiency for both stationary and transient signals, a simpler filterbank, and better handling of frequencies above 16 kHz; maintains quality nearly indistinguishable from the original audio source.; The MPG file format, short for MPEG Video, stands for Moving Picture Experts Group Video. It is a popular video file format standardized by the MPEG group, which is known for developing video and audio encoding standards. MPG files are compressed using either MPEG-1 or MPEG-2 compression, making them suitable for storing video data in a compressed form without significantly sacrificing quality. This format is widely used for creating movies that are distributed over the internet due to its good balance between file size and video quality.