AAC vs AC3

AAC means Advanced Audio Coding, is a type of digital audio file and has been promoted as the successor to the once-dominant digital audio file type, MP3.

AC3 means Audio Coding 3, is a file extension for surround sound audio files used on DVDs format. It was created by Dolby Labs for use in a Dolby Digital audio on DVD, Blu-ray and other digital video formats.

Summary:
AAC is more advanced lossy audio format than AC3, it will produce better audio quality than AC3 with same bitrate, especialy on low bitrates.

Other Comparison: MP4 vs FLV / MKV vs MP4 / MP4 vs MP3 / 3GP vs MOV / 3GP vs FLV / M2TS vs MP4 / MP4 vs 3GP / SWF vs 3GP

Related Post of AAC File formats

Related Post of AC3 File formats