**DD+ aka E-AC3**<br>

[From Wikipedia, the free encyclopedia](https://en.wikipedia.org/wiki/Dolby_Digital_Plus){:target="\_blank" rel="noopener noreferrer"}

Dolby Digital Plus, also known as Enhanced AC-3 (commonly abbreviated as DD+ or E-AC-3, or EC-3), is the successor to Dolby Digital (AC-3). It is a digital audio compression scheme developed by Dolby Labs for the transport and storage of multi-channel digital audio.