Dolby Digital Plus (DD+ or E-AC-3 (Enhanced AC-3), and sometimes incorrectly as EC-3) is a digital audio compression scheme. E-AC-3 has a number of improvements including support for a wider range of data rates (32kbit/s to 6144kbit/s), increased channel count and multi-program support (via substreams) compared with Dolby Digital (AC-3). While Dolby Digital (AC-3) supports up to 5 full-bandwidth audio channels at a maximum bitrate of 640kbit/s, E-AC-3 supports up to 15 full-bandwidth audio channels at a maximum bitrate of 6.144 Mbit/s.