- Codec ID: 0x2000
- Specification for A/52a: no longer available
- Specification for A/52b: http://www.atsc.org/standards/a_52b.pdf
ATSC A/52a is a standard for lossy encoding of audio in digital television broadcasting in the United States. It is the same as Dolby AC3. ATSC A/52b is an extension to A/52a and was approved for the Bluray and HD-DVD standard. It is the same as Enhanced AC3 or EAC3 for short. EAC3 is also supposed to be backwards compatible with AC3.