[std]AC-3. Dolby Digital. AC3 or AC-3 may refer to: Video games[edit] Ace Combat 3, part of the Ace Combat series of video gamesArmored Core 3, part of the Armored Core series of video gamesAssassin's Creed III, part of the Assassin's Creed series of video games Signal processing[edit] AC3Filter, a DirectShow filter for real time audio decoding and processingDolby AC-3, a Dolby Digital audio codec Transport[edit]
Advanced Audio Coding. Advanced Audio Coding (AAC) is a standardized, lossy compression and encoding scheme for digital audio.
Designed to be the successor of the MP3 format, AAC generally achieves better sound quality than MP3 at similar bit rates.[2] AAC has been standardized by ISO and IEC, as part of the MPEG-2 and MPEG-4 specifications.[3][4] Part of the AAC known as High Efficiency Advanced Audio Coding (HE-AAC) which is part of MPEG-4 Audio is also adopted into digital radio standards like DAB+ and Digital Radio Mondiale, as well as mobile television standards DVB-H and ATSC-M/H. History[edit] Audio compression (data)